DEV Community: jamesliu

ESP32-C3 vs ESP32-S3 — A WiFi Module Selection Guide to Avoid Pitfalls

jamesliu — Tue, 02 Jun 2026 06:13:29 +0000

Section: MCU / Wireless Modules

Our company recently started two projects simultaneously, using the EBYTE E101-C3MN4 series (ESP32-C3) and E101-S3WN8 series (ESP32-S3) respectively. The differences are significant — here's what I learned to help you avoid mistakes.

Core Differences:

ESP32-C3 (E101-C3MN4 series)

Architecture: Single-core RISC-V 32-bit, 160MHz
Positioning: Best value for money, WiFi + BLE 5.0, low cost
Use Cases: Smart plugs, lighting control, simple sensor gateways — IoT endpoints with low compute requirements
Limitations: No camera interface, no USB OTG, essentially limited to TCP/UDP/MQTT

ESP32-S3 (E101-S3WN8 series)

Architecture: Dual-core Xtensa LX7, 240MHz, with integrated neural network processor
Positioning: AI edge computing, supports vector instructions and SIMD acceleration
Use Cases: AIoT products with vision recognition, voice recognition, or LCD display
Advantages: 2.4G+5G dual-band WiFi, supports USB OTG and camera interface

My Experience:

If your project only needs data collection and WiFi connectivity → choose C3, save cost and power. AT commands work universally.

If your project needs AI algorithms, display, or video processing → you must go with S3, otherwise the compute power won't be enough.

Reminder: EBYTE modules all support AT commands, which is very friendly for engineers unfamiliar with WiFi development — you can drive them directly via serial port. But if you need deep customization, I recommend using Espressif's official ESP-IDF framework.

Wi-SUN Module with a German Chip — Real-World Test of the E51-470NW16S

jamesliu — Tue, 02 Jun 2026 06:12:20 +0000

Section: Smart Home / Smart City

I've been researching smart streetlight projects that require building ultra-large-scale wireless networks with thousands of nodes. Traditional LoRa is good, but the lack of unified protocol standards makes cross-vendor interoperability a persistent headache.

Then I came across the EBYTE E51-470NW16S, a Wi-SUN SoC module based on the Silicon Labs EFR32FG25 chip (German-designed) . It perfectly solved my pain points.

Why Choose Wi-SUN?

Open Standard Protocol: Wi-SUN is an international standard — devices from different manufacturers can interoperate, with no limits on future expansion.
Massive Scale: Based on IPv6, theoretically supporting thousands of nodes — ideal for smart city and smart grid applications.
Long Distance + High Speed: Uses OFDM modulation in the 470-510MHz band, with close-range data rates up to 3.6Mbps and open-area communication distances of 0.3~2.5km.

Real-World Impressions:

The EFR32FG25 chip runs at 97.5MHz with up to 1152KB Flash — very capable processing power.
The module exposes USB 2.0, EUART, SPI, PWM, ADC and other rich interfaces, making secondary development very flexible.
Supports Silicon Labs' official Simplicity Studio + Gecko SDK development environment, with excellent code quality and documentation.

Comparison with SPI-based Modules:

Traditional SI4463/CC1101 modules require you to write your own protocol stack — long development cycles.
The E51 series is essentially a "plug-and-play Wi-SUN terminal," significantly lowering the development barrier.

Note: Wi-SUN is still relatively new in China, and its ecosystem is not as mature as LoRa. However, overseas (especially Japan and Europe), it is already the mainstream standard for smart cities. If you have overseas projects or require standard protocol compliance, this module is well worth considering.

In-Depth Product Introduction — 1W High-Power LoRa MESH Module E52 Series

jamesliu — Mon, 01 Jun 2026 09:42:49 +0000

Section: Wireless Communications / Product Review

I recently worked on a wireless sensor network project covering a 3-square-kilometer industrial park, requiring long-distance transmission, multi-node networking, and high reliability. After comparing several solutions, I chose the EBYTE E52-400NW30S and E52-900NW30S as the core networking modules. The experience has been great, so I'm sharing it here.

What exactly are these modules?

These are EBYTE's 1W high-power LoRa MESH networking modules, with a transmit power of up to 30dBm (1W) and decentralized MESH technology. The only difference is the operating frequency band:

E52-400NW30S — 410~509MHz (default 433.125MHz), for China and European markets
E52-900NW30S — 850~929MHz (default 868.125MHz), for North America and Asia-Pacific markets

Five Key Highlights:

1W High Power: Ideal open-area communication distance of up to 4km (air data rate 7Kbps). Strong signal penetration, significantly better coverage in complex environments than standard 22dBm modules.
Decentralized MESH Networking: No central node required. Every device can act as a router. If any node goes offline, the rest of the network is unaffected — extremely high reliability.
Self-Healing Network: When a link is interrupted, routing nodes automatically rediscover paths, ensuring no data loss.
Multi-hop Routing: Data can hop through multiple relay nodes, easily covering large areas or complex terrain.
Four Communication Modes: Supports Unicast, Multicast, Broadcast, and Anycast, flexibly adapting to different application logic.

Key difference from the 22S version: The 30S has 8dBm higher transmit power (about 2.5x the power), with roughly 1.5km more range, but is larger (40.5×25mm) and consumes more power (710mA transmit current), making it better suited as a backbone relay node. In practice, you can mix 30S and 22S modules in the same network to balance range and cost.

This module has been running stably in my project for a month now. Highly recommended for anyone working on long-distance wireless networking.

E52-400NW30S vs E52-900NW30S — Full Parameter Comparison

jamesliu — Mon, 01 Jun 2026 09:42:33 +0000

Section: Technical Resources / Component Selection

When choosing between the E52-400NW30S and E52-900NW30S, aside from the frequency band, almost all technical parameters are identical. Here's a detailed comparison table based on the datasheet:
Core Parameter E52-400NW30S E52-900NW30S
Frequency Band 410.125~509.125 MHz 850.125~929.125 MHz
Default Frequency 433.125 MHz 868.125 MHz
Transmit Power 30dBm (1W), user adjustable 30dBm (1W), user adjustable
Air Data Rate 7K / 21.875K / 62.5K bps (3 levels) Same
Receive Sensitivity -121dBm @7K -121dBm @7K
Reference Range 4.0 km (open area, 7K, 3.5dBi antenna) 4.0 km (open area, 7K, 3.5dBi antenna)
Operating Voltage 3.3~5.5V (≥5.0V for full power) 3.3~5.5V (≥5.0V for full power)
Transmit Current 710 mA (instantaneous) 710 mA (instantaneous)
Receive Current ~14 mA ~14 mA
Interface UART (3.3V TTL) UART (3.3V TTL)
Max Baud Rate 460800 bps 460800 bps
Single Packet Size 200 Bytes 200 Bytes
Antenna Interface IPEX / Stamp Hole (50Ω) IPEX / Stamp Hole (50Ω)
Dimensions 40.5 × 25.0 mm 40.5 × 25.0 mm
Operating Temp -40℃ ~ +85℃ (industrial) -40℃ ~ +85℃ (industrial)

Selection Guide:

China & European markets: Choose the E52-400NW30S (433MHz band). This band has better diffraction capability, ideal for environments with many obstacles.
North America & Asia-Pacific markets: Choose the E52-900NW30S (868/915MHz band), compliant with local ISM band regulations.
Parameter tuning: For maximum range, set the air data rate to 7Kbps and lower the baud rate. For higher throughput, set the rate to 62.5Kbps, but range will drop to approximately 1.6km.

E52-400/900NW30S Frequently Asked Questions (FAQ)

jamesliu — Mon, 01 Jun 2026 09:42:17 +0000

Section: Technical Support / Q&A

While using the EBYTE E52-400NW30S and E52-900NW30S modules, engineers often run into the same issues. I've compiled this FAQ based on the datasheet and my own experience — hope it helps!

Q1: Actual transmission distance is far less than 4km. What can I do?

A: The 4km figure is an ideal value measured in clear open areas with 7Kbps air rate, 3.5dBi antenna gain, and 2.5m antenna height. In real-world use, these factors reduce range:

Obstacles: Walls, trees, and metal objects significantly attenuate the signal.
Air data rate: 7Kbps → 21.875Kbps can drop range to ~2km; 62.5Kbps may yield only ~1.6km.
Supply voltage: Make sure voltage is ≥5.0V, otherwise transmit power drops.
Antenna quality: Use an antenna with 3.5dBi gain or higher, and keep it away from metal objects.

Q2: The module gets very hot. Is this normal?

A: Yes, this is normal. The transmit current is up to 710 mA, so temperature rise during continuous transmission is expected. Recommendations: ① Leave space around the module for heat dissipation; ② Avoid long periods of continuous full-power transmission; ③ Reserve copper pour or thermal vias on the PCB design.

Q3: How do I avoid damaging the module?

A: ① Power supply: Voltage must not exceed 5.5V, otherwise the module may be destroyed. ② ESD protection: Wear an anti-static wrist strap when handling. ③ Never leave the antenna port open during transmission — an antenna must be connected, otherwise the power amplifier can be damaged by excessive standing wave ratio (SWR).

Q4: How do I check the module's current parameters?

A: Send the AT command AT+INFO=? via serial port. The module will return complete information including model, firmware version, transmit power, operating frequency, PANID, air data rate, and more. This is a powerful diagnostic tool.

Q5: The routing table is empty. What's wrong?

A: The routing table is only populated after data exchange occurs in the network. If the module was just powered on or there's no network traffic, an empty routing table is normal. Let multiple modules exchange data first, then read the routing table again.

Q6: How do I configure a module remotely?

A: When sending remote configuration commands, the target port must be set to Port 14 (other ports don't support remote configuration). Refer to Chapter 7 of the user manual for specific command formats.

Q7: The module won't enter configuration mode. What should I do?

A: Pull the M0 pin low, then power on the module — it should enter configuration mode. If it still doesn't work, check the M0 pin voltage level and verify the serial connection is correct.

E52 Series in Real-World Scenarios — Application & Selection Guide

jamesliu — Mon, 01 Jun 2026 09:41:57 +0000

Section: Application Cases / Solutions

In industrial IoT projects, choosing the right wireless networking方案 often determines success or failure. Based on my in-depth experience with the E52-400NW30S and E52-900NW30S, here are some typical application scenarios and selection tips.

Scenario 1: Industrial Park Environmental Monitoring

Requirements: Cover 3km², 50+ sensor nodes, data aggregated to a central control room.
Solution: Use 4 E52-400NW30S modules as backbone relay nodes (mounted high), each covering 8-10 E52-400NW22S end-node sensors. The network uses MESH self-organizing — any single relay node going offline won't affect the whole system.
Result: Full coverage with no dead zones. System has been running stably for 3 months with a packet loss rate below 0.1%.

Scenario 2: Smart Agriculture Greenhouse Cluster

Requirements: 20 greenhouses, each with temperature, humidity, light, and CO2 sensors. Gateway located in the central management room.
Solution: One E52-900NW22S node per greenhouse collects sensor data. E52-900NW30S modules provide inter-greenhouse relay, eventually converging at the gateway.
Result: Solved the severe signal blockage caused by greenhouse metal frames. Communication distance meets cross-greenhouse requirements.

Scenario 3: Building Automation

Requirements: 10-story office building, sensors and actuators on each floor, control center in the basement.
Solution: One E52-400NW30S per floor as a floor relay. MESH routing automatically hops between floors. The self-healing feature ensures that even if one floor's module loses power, other floors continue communicating normally.
Result: Good floor-to-floor signal penetration. No wiring needed — installation costs reduced by 70%.

Selection Summary:

400MHz version: For China and European markets. Better diffraction, ideal for obstacle-rich environments.
900MHz version: For North America and Asia-Pacific markets. Smaller antenna size, more friendly to local spectrum regulations.
30S vs 22S: Use 30S as backbone relays, 22S as end-node sensors. Mixed deployment balances range and cost.

E52 Series MESH Networking Features & Debugging Tips

jamesliu — Mon, 01 Jun 2026 09:41:25 +0000

Section: Technical Deep Dive / System Design

The MESH networking capability of the E52-400NW30S and E52-900NW30S is what makes them truly special. After some deep debugging sessions, I've整理 a few technical要点 and tips for anyone working on similar projects.

Four Communication Modes Explained

Unicast: Point-to-point communication. Data is sent only to the specified target node. Good privacy.
Multicast: Group communication. Data is sent to all members of a specified group. Great for批量 command distribution.
Broadcast: Data is sent to every node in the network. Suitable for alarm notifications.
Anycast: Data is sent to any one node that meets the criteria. Useful for load balancing scenarios.

Pro tip: Need to push configuration changes across the entire network? Use Broadcast mode to do it in one shot. Only need to control a single device? Use Unicast to avoid wasting network bandwidth.

Self-Healing Mechanism

When a node fails or a link is interrupted due to signal blockage, the E52 series automatically triggers path reconstruction. This process typically takes 2-5 seconds, during which a small number of data packets may be lost. Recommendation: Implement a data retransmission mechanism at the application layer (e.g., ACK confirmation) to ensure critical data reliability.

Handy AT Commands for Debugging

Here are the most frequently used debug commands:
Command Description
AT+INFO=? Query full module parameters (model, firmware, power, frequency, rate, etc.)
AT+PANID=? Query or set the network ID (different PANIDs isolate networks)
AT+ROUTE=? Query the current routing table (requires network traffic)
AT+NETINFO=? View network status information

Common Troubleshooting Steps

Can't form a network: Check if PANIDs match; check if air data rates are the same; check if working channels are consistent.
A specific node has communication issues: Use AT+ROUTE=? to check its routing table; verify its supply voltage; check if the antenna is intact.
High packet loss across the network: Check for co-channel interference; lower the air data rate to improve抗干扰能力; verify the master node's power supply stability.
Mixed Networking Recommendations

In real projects, I recommend mixing E52-30S and E52-22S modules. Use 30S modules for the backbone network (open areas like park main roads, building corridors), and 22S modules for end-node sensors. As long as they share the same PANID and air data rate, they'll automatically form a unified MESH network — achieving efficient "backbone + endpoint" coverage.

Summary: The E52 series has powerful networking capabilities, but you need to understand MESH protocol principles and the AT command set. Master these debugging tips and your project will go much smoother. Feel free to share your own debugging experiences in the comments!

How Does the EWM22A "3-in-1" Module Simplify IoT Design?

jamesliu — Fri, 08 May 2026 03:36:16 +0000

In complex scenarios—such as smart homes and industrial sensor networks—devices often require simultaneous support for direct mobile connectivity (BLE), internet access (Wi-Fi), and long-range networking (LoRa). Traditional solutions necessitate the integration of three separate modules, a practice that not only consumes valuable PCB real estate but also increases design complexity and cost. Ebyte’s EWM22A series modules offer an elegant solution: integrating BLE 5.0, Wi-Fi, and LoRa into a compact package measuring just 14 x 20 mm.
This "3-in-1" module supports up to nine distinct operating modes. For instance, it can transmit serial data over long distances via LoRa while simultaneously allowing a mobile phone to monitor that data via Bluetooth; alternatively, it can connect to a router via Wi-Fi to upload data directly to the cloud. With a deep-sleep current consumption as low as 6.7μA, it is perfectly suited for battery-powered applications. For product developers seeking high levels of integration and flexibility, the EWM22A not only streamlines hardware design but also delivers unprecedented deployment versatility, making it the ideal choice for building the next generation of IoT devices.

A Brief Discussion on the Ultra-Low Power and Long-Range Design of LoRa Modules

jamesliu — Fri, 08 May 2026 03:35:47 +0000

In IoT projects, engineers often face a dilemma: achieving long-range communication typically requires high power output, leading to skyrocketing power consumption; conversely, prioritizing low power consumption often results in a severely compromised communication range. Ebyte’s LoRa modules—such as the E22 and E220 series—cleverly resolve this inherent conflict by leveraging Semtech’s next-generation LoRa spread spectrum technology.
At the core of this capability lies the "Wake-on-Air" function. For the majority of the time, the module remains in a deep sleep state (with sleep current consumption as low as 2µA in the E22 series), periodically waking up only to listen for wake-up signals. This mechanism enables battery-powered devices—such as remote field sensors—to achieve a battery life spanning several years while simultaneously maintaining a communication range of several kilometers. Furthermore, by flexibly adjusting the air data rate (ranging from 2.4 Kbps to 62.5 Kbps) and transmit power via AT commands, developers can strike the optimal balance between power consumption and communication distance. For instance, power output can be reduced in short-range scenarios to conserve energy, while the data rate can be lowered in long-range scenarios to gain higher receiver sensitivity. This design philosophy makes it possible to truly "have the best of both worlds."

E160-TxF12S2 OOK Wireless Transmitter Module

jamesliu — Tue, 14 Apr 2026 01:54:55 +0000

Introduction
Against the backdrop of rapid expansion in the global consumer electronics and smart home markets, Grand View Research data shows that the global wireless remote control device market size reached US$19.8 billion in 2025, with an expected CAGR of 7.2% by 2030. Among them, Sub-1GHz OOK/ASK modulation solutions, with their advantages of low cost, low power consumption and strong anti-interference capability, account for more than 70% of the consumer remote control product market share. Chengdu Ebyte Electronic Technology Co., Ltd., a leading domestic provider of wireless communication solutions, has launched the E160-TxF12S2 OOK wireless transmitter module for low-cost remote control scenarios, which has become an ideal choice for small home appliances, toys, access control and other fields with its ultra-high cost-effectiveness and industrial-grade reliability.

Based on official manual parameters, this article comprehensively analyzes the technical features, application solutions and deployment guidelines of the E160-TxF12S2, providing selection references for consumer electronics developers.

Table of Contents

Core Product Features

Detailed Technical Specifications

Hardware Design and Pin Definition

Software Development and Coding Rules

Typical Applications and Reference Circuits

Frequently Asked Questions and Solutions

Soldering and Mass Production Guide

Selection Reference and Supporting Solutions

Core Product Features The E160-TxF12S2 is an OOK/ASK modulated wireless transmitter module specially designed for low-cost remote control scenarios. It has a built-in high-performance RF chip and power amplifier, factory-cured EV1527 standard encoding and 20bits unique address code, enabling rapid productization without additional encoding development. The core advantages are as follows:

Feature Category
Specific Parameters

Modulation Method
OOK/ASK (Amplitude Shift Keying/On-Off Keying)

Operating Frequency Band
315MHz (E160-T3F12S2) / 433.92MHz (E160-T4F12S2)

Transmit Power
+13dBm (@3.3V power supply)

Communication Range
Up to 210m in ideal environment (paired with E160-RxMD2 receiver module, 1.5dBi antenna, 2m height)

Power Consumption Performance
Transmit current 10mA, sleep current only 1μA

Encoding Features
Built-in EV1527 standard encoding, factory-cured 20bits unique address code (million groups without repetition)

Button Support
3 independent input pins, expandable to 6 buttons through combination

Reliability Design
±4KV ESD electrostatic protection (±6KV for RF pin), industrial temperature range of -40℃~+85℃

Power Supply Features
Wide voltage 1.8V~3.6V, supports button battery power supply

Dimensions
20.4×13.3×2.5mm ultra-small size, stamp hole SMD package

Each module has a globally unique 20bits address code, with an address repetition probability of only one in a million, effectively avoiding crosstalk between different devices.

Detailed Technical Specifications 2.1 RF Parameters

RF Parameter
Parameter Value
Remarks

Operating Frequency
315MHz / 433.92MHz
Two models available

Modulation Method
ASK/OOK
Amplitude shift keying modulation

Maximum Transmit Power
13±1.0dBm
Typical value, @3.3V power supply

Harmonic Suppression

45dBc
@433MHz, second harmonic

Transmission Rate
28kbps
Fixed value

Frequency Offset

±0.05MHz

Antenna Impedance

50Ω

Reference Communication Range
210m
Paired with E160-RxMD2 receiver module, clear open environment

2.2 Electrical Parameters

Electrical Parameter
Minimum
Typical
Maximum
Remarks

Operating Voltage
1.8V
3.3V
3.6V
≥3.3V ensures maximum output power, exceeding 3.6V has burn-out risk

Communication Level
1.8V
3.3V
3.6V
Consistent with power supply voltage

Transmit Current

10.0mA

Instantaneous power consumption @3.3V power supply, 433.92MHz, 13dBm transmission

Sleep Current

1μA

Automatically enters sleep when no data is sent

ESD Protection
-4KV

+4KV
HBM standard, ±6KV for RF pin

Operating Temperature

-40℃

+85℃
Industrial-grade design

Operating Humidity

10%rh

90%rh

Storage Temperature

-65℃

+150℃

2.3 Hardware Parameters

Hardware Parameter
Parameter Value
Remarks

Crystal Frequency
26.25MHz (315MHz version) / 26.2982MHz (433MHz version)

Module Dimensions
20.413.32.5mm
LWH

Antenna Form

Stamp hole

Communication Interface
GPIO
1.8~3.6V level, 3.3V recommended for reliability

Package Form
SMD/stamp hole
Pin pitch 2.54mm

Weight

3.65g

Hardware Design and Pin Definition 3.1 Pin Layout The E160-TxF12S2 adopts a 9-pin SMD package. The core pin definitions are as follows:

Pin Number
Pin Name
Direction
Function Description

1
K0
Input
Button input pin, active low, at least 100ms duration, key value "0001"

2
K1
Input
Button input pin, active low, at least 100ms duration, key value "0010"

3
K2
Input
Button input pin, active low, at least 100ms duration, key value "0100"

4
NC
Output
LED output pin, active low, outputs low when button is pressed, outputs high when released

5
VDD
Power
DC 1.8~3.6V power input

GND

Power ground

GND

Power ground

GND

Power ground

9
ANT
Output
Antenna pin, only transmits signals, no receiving function

Combined button expansion: Through button matrix design, up to 6 button functions can be realized, corresponding key values: K3="1000", K4="0101", K5="0110"

3.2 Hardware Design Notes

Power Design: It is recommended to use a DC regulated power supply with ripple coefficient less than 100mV, reserve more than 30% power margin, ensure reliable grounding of the module, and do not reverse the positive and negative poles of the power supply.

Wiring Specification: High-frequency digital traces, analog traces and power traces should avoid passing under the module. If necessary, lay copper on the contact layer of the module and ground it well, and the traces should be placed on the bottom layer.

Electromagnetic Compatibility: The module should be kept away from strong electromagnetic interference sources such as power supplies, transformers and high-frequency wiring, and maintain an appropriate distance from 2.4GHz devices such as USB 3.0.

Antenna Deployment: The antenna should be exposed as much as possible and vertically upward. If installed in a metal case, an antenna extension cable must be used to lead it out to avoid significant signal attenuation.

Software Development and Coding Rules The E160-TxF12S2 has built-in EV1527 standard encoding, no additional encoding development is required, and it can be directly used with the E160-RxMD2 receiver module, or users can develop their own decoding logic.

4.1 Data Frame Structure
The data frame sent by the module follows the EV1527 encoding rule, consisting of a synchronization code, 20-bit address code and 4-bit key value code, with a basic unit time T≈35μs:

Synchronization code: 32T high level + 80T low level

Data bit "1": 3T high level + 1T low level

Data bit "0": 1T high level + 3T low level

The complete frame structure is as follows:

32*T
204T
44T

Synchronization code
20-bit address code (C0~C19)
4-bit key value code (D0~D3)

4.2 Usage Methods

Direct button connection: Connect one end of the button to the K0/K1/K2 pin of the module, and the other end to ground. Pressing the button will automatically send the corresponding encoded signal, no MCU participation required.

MCU control: The MCU pin can simulate the button level change to realize data transmission, suitable for scenarios requiring dynamic control.

Receiver decoding: After demodulation with the E160-RxMD2 receiver module, the MCU parses the 20-bit address code and 4-bit key value code to realize the corresponding control function.

Note: Since the module communication rate is 28kbps, it needs to be used with the E160-RxMD2 receiver module that supports this rate. High-speed receiver modules such as E160-RxMS1 are not applicable.

Typical Applications and Reference Circuits 5.1 3 Independent Buttons Application Circuit Suitable for simple remote control scenarios with less than 3 buttons, the circuit design is the simplest:

K0/K1/K2 pins are respectively connected to independent buttons, and the other end of the button is grounded

NC pin is connected in series with a 470Ω resistor and LED indicator for button status indication

The power supply uses a 3V button battery, with standby power consumption of only 1μA, and the battery life can reach more than 1 year

5.2 6 Combined Buttons Application Circuit
Through the matrix button design, 6 button functions are realized with 3 pins, suitable for multi-function remote controls:

K0+K1 combination realizes K3 function (key value 1000)

K0+K2 combination realizes K4 function (key value 0101)

K1+K2 combination realizes K5 function (key value 0110)

Supports 3 independent buttons and 3 combined buttons at the same time, meeting the needs of most consumer remote control applications

5.3 Typical Application Scenarios
The high cost-effectiveness and low power consumption features of the E160-TxF12S2 make it widely applicable to the following scenarios:

Small Home Appliance Remote Control: Wireless remote control for fans, lighting, bath heaters, humidifiers and other small home appliances

Toy Remote Control: Low-power remote control applications for remote control cars, remote control planes, electric toys, etc.

Access Control System Remote Control: Wireless remote controls for community access control, garage doors, electric rolling doors

Electric Bicycles: Anti-theft remote controls for electric bicycles and electric motorcycles

Smart Switches: Control terminals for wireless remote control switches and smart sockets

Frequently Asked Questions and Solutions 6.1 Unsatisfactory Transmission Range Possible Causes:

There are linear obstacles, same-band interference, or metal shielding near the antenna

Power supply voltage is lower than 3.3V, resulting in reduced transmit power

Poor matching between antenna and module, or poor antenna quality

Tested in environments with strong radio wave absorption such as near the ground or seaside

Solutions:

Elevate the antenna installation height, avoid obstacles and interference sources

Ensure the power supply voltage is ≥3.3V, use a regulated power supply

Replace a matched high-gain antenna, use an antenna extension cable when deployed inside a metal case

Test in an open environment, avoid using in strong absorption environments

6.2 Module Easy to Damage
Possible Causes:

Power supply voltage exceeds 3.6V, or the positive and negative poles of the power supply are reversed

No electrostatic protection during installation, causing chip breakdown

Operating environment humidity exceeds 90%, or temperature exceeds the industrial grade range

Solutions:

Add over-voltage and reverse polarity protection circuits, strictly control the power supply voltage between 1.8~3.6V

Implement electrostatic protection during installation and operation, ensure good module grounding

Avoid using in environments exceeding -40℃~+85℃ or high humidity

6.3 High Bit Error Rate
Possible Causes:

There is same-frequency signal interference nearby

Unstable power supply with excessive ripple

Antenna feeder is too long or of poor quality, resulting in signal attenuation

Solutions:

Replace modules of different frequency bands (switch between 315MHz/433MHz) to avoid interference frequency bands

Optimize power supply design, add filter capacitors to reduce power supply ripple

Shorten the antenna feeder length, use low-loss coaxial cable

Soldering and Mass Production Guide 7.1 Reflow Soldering Parameters The module supports lead-free reflow soldering, with the following soldering parameters:

Curve Feature
Leaded Soldering
Lead-free Soldering

Solder Paste Type
Sn63/Pb37
Sn96.5/Ag3/Cu0.5

Preheat Temperature Range
100℃~150℃
150℃~200℃

Preheat Time
60-120 sec
60-120 sec

Average Ramp-up Rate
≤3℃/sec
≤3℃/sec

Liquidous Temperature
183℃
217℃

Time Above Liquidous
60-90 sec
30-90 sec

Peak Temperature
220-235℃
230-250℃

Average Ramp-down Rate
≤6℃/sec
≤6℃/sec

Total Time from 25℃ to Peak
≤6 minutes
≤8 minutes

7.2 Mass Packaging Method
The modules are packaged in tape and reel, 1000pcs per reel, with packaging specifications:

Tape dimensions: width 44.5~48.5mm, thickness 2.9±0.1mm

Reel diameter: 330±0.2mm

Suitable for fully automatic SMT mounter production, improving mass production efficiency

Selection Reference and Supporting Solutions 8.1 Peer Product Comparison

Product Model
Transmit Power
Communication Range
Number of Buttons
Sleep Current
Package Size

E160-TxF12S2
13dBm
210m
6 (3 pins expanded)
1μA
20.4*13.3mm

E160-TxF20S2
20dBm
500m
6
2μA
22*15mm

Competitor Ordinary Transmitter Module
10dBm
100m
3
5μA
25*15mm

8.2 Recommended Supporting Receiver Modules

Receiver Module Model
Receive Sensitivity
Compatible Rate
Application Scenario

E160-RxMD2
-112dBm
2.4~48kbps
Best match with E160-TxF12S2, high sensitivity and low power consumption

E160-RxMS2
-108dBm
1~10kbps
Long-distance transmission scenarios, strong anti-interference capability

8.3 Recommended Antennas

Antenna Model
Type
Gain
Application Scenario

TX433-JZ-5
Spring Antenna
1.5dBi
Small remote controls, built-in installation

TX433-JK-10
Copper Rod Antenna
2.0dBi
Medium-distance transmission, external installation

TX433-XPH-300
Suction Cup Antenna
3.0dBi
Long-distance transmission, fixed equipment

About Ebyte
Chengdu Ebyte Electronic Technology Co., Ltd. is a national high-tech enterprise focusing on wireless communication applications. Its products cover the full range of wireless modules including LoRa, Bluetooth, Wi-Fi, Sub-1GHz, etc., which are widely used in consumer electronics, industrial IoT, smart home, smart agriculture and other fields. The company has more than 100 technical patents, and its products have passed international certifications such as FCC, CE and RoHS, and are exported to more than 160 countries and regions. It can provide customers with customized development and one-stop wireless communication solutions.

Official Website: https://www.cdebyte.com

Technical Support: support@cdebyte.com

Sales Hotline: +86-4000-330-990

Address: 2nd Floor, Building B2, 199 Xiqu Avenue, High-tech Zone, Chengdu, Sichuan, China

E160-TxF12S2 OOK Wireless Transmitter Module In-depth Analysis

jamesliu — Tue, 14 Apr 2026 01:51:24 +0000

Introduction
With the rapid expansion of the global consumer electronics and smart home markets, demand for short-range wireless remote control products has continued to rise in recent years. According to the latest data from Grand View Research, the global wireless remote control device market reached $19.8 billion in 2025 and is expected to maintain a 7.2% CAGR through 2030. Among various wireless remote control solutions, OOK/ASK modulation technology in the Sub-1GHz frequency band, with its outstanding advantages of low cost, low power consumption, and strong anti-interference capability, has occupied more than 70% of the consumer remote control product market share.

As a leading domestic provider of wireless communication solutions, Chengdu Ebyte Electronic Technology has launched the E160-TxF12S2 series OOK wireless transmitter module for mass application needs of small and medium-sized customers. This module integrates a high-performance RF chip and power amplifier, with factory-cured standard EV1527 encoding and a unique address code. Customers can quickly achieve mass production without additional encoding development. With its ultra-high cost-effectiveness and industrial-grade reliability, it has become the preferred solution for developers in the fields of small home appliances, toys, and access control.

Based on the measured parameters of the official technical manual, this article comprehensively analyzes the technical features, application solutions, and deployment considerations of the E160-TxF12S2, providing a complete selection reference for consumer electronics developers.

Table of Contents

Core Product Features

Detailed Technical Specifications

Hardware Design and Pin Definition

Software Development and Coding Rules

Typical Applications and Reference Circuits

Frequently Asked Questions and Solutions

Soldering and Mass Production Guide

Selection Reference and Supporting Solutions

Core Product Features The E160-TxF12S2 is an OOK/ASK modulated wireless transmitter module specially optimized for low-cost remote control scenarios. It integrates a high-performance RF chip and power amplifier, with factory-cured standard EV1527 encoding and a 20-bit unique address code. Customers can quickly achieve productization without additional encoding development. The core advantages are mainly reflected in the following aspects:

Modulation and Frequency Band: Adopts OOK/ASK amplitude shift keying modulation, providing two common frequency band options: 315MHz (model E160-T3F12S2) and 433.92MHz (model E160-T4F12S2), adapting to spectrum usage requirements in different regions.

Transmission Performance: The maximum transmit power can reach +13dBm when powered by 3.3V. When paired with the same series E160-RxMD2 receiver module, in clear open environments, with a 1.5dBi antenna and the transmitter at 2m height, the stable transmission range can reach 210m.

Power Consumption Performance: The typical current in transmit mode is only 10mA. It automatically enters sleep mode when no data is sent, with a sleep current as low as 1μA, making it very suitable for portable remote control products powered by button batteries.

Encoding Advantage: Built-in standard EV1527 encoding format. Each module is factory-cured with a globally unique 20-bit address code, with an address repetition probability of only one in a million, effectively avoiding crosstalk between different devices.

Key Expansion: Only 3 independent input pins are provided, and up to 6 key functions can be realized through a simple matrix combination design, greatly reducing the customer's hardware design cost.

Reliability Design: The whole machine meets ±4KV ESD electrostatic protection requirements (up to ±6KV for RF pins), supports an industrial operating temperature range of -40°C to +85°C, and can adapt to various complex usage environments.

Power Supply and Size: Supports 1.8V~3.6V wide voltage power supply, which can be directly powered by two dry batteries or button batteries; the overall size is only 20.4×13.3×2.5mm, adopting a stamp hole SMD package, which is easy to embed into various small devices.

Detailed Technical Specifications 2.1 RF Parameters The E160-TxF12S2 provides two frequency band versions: the 315MHz version is equipped with a 26.25MHz crystal oscillator, and the 433.92MHz version is equipped with a 26.2982MHz crystal oscillator, both using OOK/ASK amplitude shift keying modulation. The typical transmit power is 13dBm at 3.3V power supply, with a deviation range of ±1dBm. The second harmonic suppression of the 433MHz version is greater than 45dBc, complying with electromagnetic compatibility standards of various countries. The transmission rate is fixed at 28kbps, the frequency offset is controlled within ±0.05MHz, and the antenna impedance matching is standard 50Ω. When used with the same series E160-RxMD2 receiver module, the reference stable communication range is 210m.

2.2 Electrical Parameters
The module supports 1.8V to 3.6V wide voltage power supply, with a typical operating voltage of 3.3V. When the voltage is higher than 3.3V, the maximum transmit power output can be guaranteed, and exceeding 3.6V may cause chip burnout. The communication level is consistent with the power supply voltage, ranging from 1.8V to 3.6V. It is recommended to use 3.3V power supply to ensure data transmission reliability. The instantaneous transmit current at 3.3V power supply, 433.92MHz frequency band, and 13dBm transmit power is typically 10mA. It automatically enters sleep mode when no data is sent, with a sleep current of only 1μA. The electrostatic protection meets the HBM standard of ±4KV, and the RF pin can reach ±6KV. The operating temperature range is -40°C to +85°C, the operating humidity is 10%~90%RH, and the storage temperature range is -65°C to +150°C, meeting industrial application requirements.

2.3 Hardware Parameters
The 315MHz version uses a 26.25MHz crystal oscillator, and the 433.92MHz version uses a 26.2982MHz crystal oscillator. The overall size of the module is 20.4mm×13.3mm×2.5mm, adopting a stamp hole SMD package with a standard pin pitch of 2.54mm. The antenna interface is in stamp hole form, the communication interface is GPIO, and the single unit weight is only 3.65g, suitable for high-density SMT production.

Hardware Design and Pin Definition 3.1 Pin Layout The E160-TxF12S2 adopts a 9-pin SMD package, and the function definition of each pin is as follows:

K0 Pin: Input pin for button input, active low. The button press needs to last at least 100ms to ensure stable recognition, corresponding to the binary key value "0001".

K1 Pin: Input pin for button input, active low. The button press needs to last at least 100ms to ensure stable recognition, corresponding to the binary key value "0010".

K2 Pin: Input pin for button input, active low. The button press needs to last at least 100ms to ensure stable recognition, corresponding to the binary key value "0100".

NC Pin: Output pin for LED status indication, active low. It outputs low level when a button is pressed, and returns to high level when the button is released. It can be connected to an external LED to indicate the button operation status.

VDD Pin: Power input pin, supporting 1.8V~3.6V DC power supply.

GND Pin: Power ground, with a total of 3 GND pins, all of which need to be reliably grounded to ensure module performance.

ANT Pin: Antenna output pin, only used for transmitting RF signals, no receiving function, needs to be connected to a 50Ω matched antenna.

Through a simple matrix button design, up to 6 key expansion functions can be realized: K0+K1 combination corresponds to the key value "1000" (defined as K3), K0+K2 combination corresponds to the key value "0101" (defined as K4), and K1+K2 combination corresponds to the key value "0110" (defined as K5). Only 3 input pins can meet the key requirements of most consumer remote control products.

3.2 Hardware Design Notes
In terms of power design, it is recommended to use a DC regulated power supply to power the module, with the power supply ripple coefficient controlled within 100mV. It is recommended to reserve more than 30% power margin in the power supply circuit to ensure the long-term stable operation of the module. Special attention should be paid not to reverse the positive and negative poles of the power supply, otherwise it may cause permanent damage to the module.

In terms of wiring specifications, high-frequency digital traces, analog traces, and power traces should avoid passing under the module as much as possible. If it is really necessary to pass through, the module contact layer (top layer) should be fully covered with copper and grounded well, and related traces should be arranged on the bottom layer of the PCB. The module should be kept away from strong electromagnetic interference sources such as power supplies, transformers, and high-frequency wiring, and maintain an appropriate distance from 2.4GHz devices such as USB 3.0 to avoid signal interference.

In terms of antenna deployment, the antenna should be exposed as much as possible and kept vertically upward to obtain the best radiation efficiency. If the module needs to be installed inside a metal case, a low-loss antenna extension cable must be used to lead the antenna out of the case, otherwise it will cause significant signal attenuation and seriously shorten the communication range.

Software Development and Coding Rules The E160-TxF12S2 has built-in standard EV1527 encoding. Customers do not need additional encoding development, and can directly use it with the same series E160-RxMD2 receiver module, or develop their own receiver decoding logic according to the coding rules.

4.1 Data Frame Structure
The data frame sent by the module strictly follows the EV1527 encoding rules, consisting of three parts: synchronization code, 20-bit address code, and 4-bit key value code, with a basic unit time T of approximately 35μs. The synchronization code consists of 32 T high levels and 80 T low levels for receiver synchronization; data bit "1" consists of 3 T high levels plus 1 T low level, and data bit "0" consists of 1 T high level plus 3 T low levels. The total length of the complete data frame is 32T + 20×4T + 4×4T = 128T, approximately 4.48ms. Combined with multiple repeated transmission mechanisms, the bit error rate can be effectively reduced.

4.2 Usage Methods
Direct button connection is the simplest application method: connect one end of the physical button to the K0/K1/K2 pin of the module, and the other end directly to ground. When the button is pressed, the module will automatically recognize and send the RF signal of the corresponding code, completely without MCU participation, which can minimize the system cost and is suitable for remote control products with simple functions.

MCU control is suitable for scenarios requiring dynamic control: the GPIO pin of the MCU simulates the button level change, actively triggers the module to send data, and can realize more flexible control logic, such as timed transmission, condition-triggered transmission and other functions.

For receiver decoding, it is recommended to preferentially use the Ebyte E160-RxMD2 receiver module. The digital signal demodulated and output by this module can be directly sent to the MCU for analysis. According to the above coding rules, the 20-bit address code and 4-bit key value code are extracted, and the corresponding control function can be realized. It should be noted that since the module has a fixed transmission rate of 28kbps, it needs to be paired with a receiver module that supports this rate. High-speed receiver modules such as E160-RxMS1 are not applicable.

Typical Applications and Reference Circuits 5.1 3 Independent Buttons Application Circuit Suitable for simple remote control scenarios with less than 3 buttons, the circuit design is the most simplified: K0, K1, K2 pins are respectively connected to independent physical buttons, and the other end of the button is directly grounded; the NC pin is connected in series with a 470Ω current-limiting resistor and LED indicator for intuitive indication of button operation status; the power supply is directly powered by a 3V button battery. Since the standby power consumption is only 1μA, the service life of an ordinary CR2032 button battery can reach more than 1 year, which is very suitable for small remote control products.

5.2 6 Combined Buttons Application Circuit
Through the matrix button design, 6 key functions can be realized with 3 input pins, which is suitable for multi-function remote controls: in addition to the 3 independent buttons corresponding to K0, K1, and K2, three combined buttons of K0+K1, K0+K2, and K1+K2 are added, corresponding to the three functions of K3, K4, and K5 respectively. Only 3 diodes are needed in hardware to realize interlocking and avoid button conflicts, which can meet the functional requirements of most consumer remote control products.

5.3 Typical Application Scenarios
With its high cost-effectiveness and low power consumption characteristics, the E160-TxF12S2 has been widely used in various scenarios:

Small Home Appliance Remote Control: Wireless remote controls for various small home appliances such as fans, lighting, bath heaters, humidifiers, and air purifiers, replacing traditional infrared remote controls, supporting wall penetration operation, and no angle limitation.

Toy Remote Control: Low-power remote control applications for remote control cars, remote control planes, electric toys, etc., with small size and light weight, which will not increase the burden of the toy, and have a long battery life.

Access Control System Remote Control: Wireless remote controls for community access control, garage doors, electric rolling doors, and barrier gates, with unique and non-repeating address codes and high security.

Electric Bicycles: Anti-theft alarm remote controls for electric bicycles and electric motorcycles, with small size and easy to embed in the key handle.

Smart Switches: Control terminals for wireless remote control switches, smart sockets, and lighting control, which can realize remote control without wiring, greatly reducing installation costs.

Frequently Asked Questions and Solutions 6.1 Unsatisfactory Transmission Range If you find that the transmission range does not meet expectations in actual use, you can check from the following aspects:

First, check whether there are linear obstacles or same-band interference, and whether there are metal objects blocking near the antenna. Environments with strong radio wave absorption such as near the ground or the seaside will also significantly shorten the range. Second, confirm whether the power supply voltage is lower than 3.3V. The lower the voltage, the smaller the transmit power, and the shorter the range. In addition, check whether the antenna and the module are matched, whether the antenna itself is of qualified quality, and whether there is bending or damage.

The corresponding solutions include: try to elevate the antenna installation height to avoid obstacles and interference sources; ensure that the power supply voltage is stable above 3.3V, and use a regulated power supply with small ripple; replace the high-gain antenna matched with the module, and use a high-quality antenna extension cable to lead it out when installed in a metal case; try to use it in an open environment, and avoid deploying in a strong absorption environment.

6.2 Module Easy to Damage
When the module is abnormally damaged, first check whether the power supply voltage exceeds 3.6V, or whether the positive and negative poles of the power supply are reversed, which is the most common cause of damage. Second, confirm whether electrostatic protection is done during the installation process. High-frequency chips are sensitive to static electricity, and direct contact without releasing static electricity may cause hidden chip breakdown. In addition, long-term use in an environment where the humidity exceeds 90% or the temperature exceeds the industrial grade range will also accelerate component aging and lead to premature damage of the module.

The corresponding solutions include: adding overvoltage protection and reverse connection protection circuits in the power supply circuit, strictly controlling the power supply voltage within the range of 1.8V~3.6V; doing a good job of electrostatic protection measures during production and installation, operators wear electrostatic bracelets, and the workbench is well grounded; avoid using in environments exceeding -40°C~+85°C or high humidity environments, and three-proof treatment can be done for special environments.

6.3 High Bit Error Rate
When the communication bit error rate is high, first check whether there is same-frequency signal interference nearby and whether the current frequency band is occupied by other devices. Second, check whether the power supply is stable. Excessive ripple may also cause abnormal transmitted signals and garbled codes. In addition, if the antenna feeder is too long or of poor quality, it will cause serious signal attenuation and reduced signal-to-noise ratio, which will also increase the bit error rate.

The corresponding solutions include: replacing modules of different frequency bands (switching between 315MHz and 433MHz) to avoid interference frequency bands; optimizing power supply design, adding filter capacitors to reduce power supply ripple; shortening the length of the antenna feeder as much as possible, using low-loss coaxial cables to reduce signal attenuation.

Soldering and Mass Production Guide 7.1 Reflow Soldering Parameters The E160-TxF12S2 supports leaded and lead-free reflow soldering processes, and the soldering parameters need to be strictly controlled according to the following requirements:

Leaded soldering uses Sn63/Pb37 solder paste, preheat temperature range 100°C~150°C, preheat time 60~120 seconds, average heating rate not exceeding 3°C/sec, liquidus temperature 183°C, time above liquidus 60~90 seconds, peak temperature 220~235°C, average cooling rate not exceeding 6°C/sec, total time from 25°C to peak temperature not exceeding 6 minutes.

Lead-free soldering uses Sn96.5/Ag3/Cu0.5 solder paste, preheat temperature range 150°C~200°C, preheat time 60~120 seconds, average heating rate not exceeding 3°C/sec, liquidus temperature 217°C, time above liquidus 30~90 seconds, peak temperature 230~250°C, average cooling rate not exceeding 6°C/sec, total time from 25°C to peak temperature not exceeding 8 minutes.

Avoid exceeding the peak temperature for a long time during soldering, otherwise it may cause damage to the internal chip of the module.

7.2 Mass Packaging Method
The E160-TxF12S2 adopts standard tape and reel packaging, with 1000 pieces per reel, tape width 44.5~48.5mm, thickness 2.9±0.1mm, reel diameter 330±0.2mm, fully compatible with automatic SMT mounter production, which can greatly improve mass production efficiency and reduce labor costs.

Selection Reference and Supporting Solutions 8.1 Peer Product Comparison Compared with similar products on the market, the advantages of the E160-TxF12S2 are very obvious: ordinary competitor transmitter modules have a typical transmit power of only 10dBm, a communication range of about 100m, usually only support 3 buttons, a sleep current of about 5μA, and a package size of about 25×15mm; while the E160-TxF12S2 has a transmit power of 13dBm, a communication range of up to 210m, supports up to 6 buttons, a sleep current as low as 1μA, and a size of only 20.4×13.3mm. The comprehensive performance is significantly improved, but the price is basically the same.

If a longer transmission range is required, you can choose the same series E160-TxF20S2 module, with the transmit power increased to 20dBm, a communication range of up to 500m, a sleep current of only 2μA, and a size of 22×15mm, suitable for long-distance remote control scenarios.

8.2 Recommended Supporting Receiver Modules
It is recommended to preferentially use the Ebyte E160-RxMD2 receiver module. This module has a receiving sensitivity of up to -112dBm and supports a transmission rate of 2.4~48kbps. It is the best match for the E160-TxF12S2, with both high sensitivity and low power consumption characteristics. If longer-distance transmission is required, you can choose the E160-RxMS2 receiver module, with a receiving sensitivity of -108dBm, supporting a rate of 1~10kbps, and stronger anti-interference capability.

8.3 Recommended Antennas
Different antennas can be selected according to different application scenarios: for small built-in remote controls, it is recommended to use the TX433-JZ-5 spring antenna, with a gain of 1.5dBi, small size and easy installation; for medium-distance external applications, it is recommended to use the TX433-JK-10 copper rod antenna, with a gain of 2.0dBi and stable signal; for long-distance fixed equipment, it is recommended to use the TX433-XPH-300 suction cup antenna, with a gain of 3.0dBi and easy installation.

About Ebyte
Chengdu Ebyte Electronic Technology Co., Ltd. is a national high-tech enterprise focusing on wireless communication applications. Its products cover the full range of wireless modules including LoRa, Bluetooth, Wi-Fi, Sub-1GHz, etc., which are widely used in consumer electronics, industrial IoT, smart home, smart agriculture and other fields. The company has more than 100 technical patents, and its products have passed international certifications such as FCC, CE and RoHS, and are exported to more than 160 countries and regions around the world. It can provide customers with customized development and one-stop wireless communication solutions.

Official Website: https://www.cdebyte.com

Technical Support: support@cdebyte.com

Sales Hotline: +86-4000-330-990

Address: 2nd Floor, Building B2, 199 Xiqu Avenue, High-tech Zone, Chengdu, Sichuan, China

E220P-400T22S LoRa Module In-depth Analysis: Cost-effective Solution for Industrial Wireless Communication

jamesliu — Tue, 14 Apr 2026 01:50:13 +0000

Title: E220P-400T22S LoRa Module | 7km Range Industrial Wireless Transceiver | Ebyte

Keywords: E220P-400T22S, LoRa module, 433MHz wireless module, industrial IoT transceiver, long range LoRa, Ebyte LoRa module, LLCC68 wireless module, low power LoRa

Description: The E220P-400T22S is an industrial-grade LoRa module based on Semtech LLCC68 chip, offering 7km communication range, 22dBm output power, and 2μA ultra-low sleep current, ideal for smart metering, industrial sensing, and building automation applications.

Introduction
Against the backdrop of rapid growth in the global wireless communication module market, QYResearch shows that the global wireless module market size reached US$6.972 billion in 2025, and is expected to exceed US$10.36 billion by 2032, with a CAGR of 5.9%. Among them, Sub-1GHz industrial-grade communication modules, as core connectivity components for smart metering, industrial sensing, building automation and other scenarios, continue to see rising market demand. Chengdu Ebyte Electronic Technology Co., Ltd., a leading domestic provider of wireless communication solutions, relying on industry-university-research cooperation with universities such as University of Electronic Science and Technology of China and Southwest Jiaotong University, has launched the E220P-400T22S LoRa wireless module, which has become an ideal choice for industrial IoT scenarios with its low power consumption, long range and high reliability features.

Based on official manual parameters, this article comprehensively analyzes the technical features, application scenarios and deployment guidelines of the E220P-400T22S, providing selection references for industrial equipment developers.

Table of Contents

Core Product Features

Detailed Technical Specifications

Hardware Design and Pin Definition

Operating Modes and Function Description

Configuration Method and Register Description

Typical Application Scenarios

Frequently Asked Questions and Solutions

Selection Reference and Peer Comparison

Core Product Features The E220P-400T22S is a new generation LoRa wireless serial port module designed based on the Semtech LLCC68 chip. Compared with the traditional SX1276 solution, it achieves comprehensive improvements in transmission distance, speed and power consumption. The core advantages are as follows:

Feature Category
Specific Parameters

Core Solution
Semtech LLCC68 LoRa chip

Operating Frequency Band
410.125 ~ 493.125MHz (default 433.125MHz)

Transmit Power
Maximum 22dBm, multi-level software adjustable

Communication Range
Up to 7km in ideal environment (5dBi antenna, 2.5m height, 2.4kbps rate)

Power Consumption Performance
Receive current 11mA, sleep current only 2μA

Reliability Design
Built-in PA+LNA, ESD protection, ±1PPM high-precision active crystal oscillator, industrial temperature range of -40℃~+85℃

Advanced Functions
Wake-on-air, carrier sense, communication encryption, RSSI signal strength detection

Interface Compatibility
UART TTL level, supports 3.3V/5V IO voltage, dual antenna options (IPEX/stamp hole)

This module supports parameter saving after power off, with built-in watchdog design, which can automatically restart under abnormal conditions to ensure long-term stable operation.

Detailed Technical Specifications 2.1 Absolute Maximum Ratings

Parameter
Minimum
Maximum
Remarks

Supply Voltage
2.3V
5.5V
Exceeding 5.5V will cause permanent damage

Operating Temperature
-40℃
+85℃
Industrial-grade design

Blocking Power

10dBm
Very low risk of burn-out for short-distance use

2.2 Operating Parameters

Parameter
Minimum
Typical
Maximum
Remarks

Supply Voltage
3.3V
5.0V
5.5V
≥5.0V ensures optimal output power

Transmit Current

110mA

@22dBm transmit power

Receive Current

11mA

Normal receive mode

Sleep Current

2μA

Software off mode

Receive Sensitivity
-132dBm
-135dBm
-136dBm
@2.4kbps air data rate

Air Data Rate
2.4kbps
2.4kbps
62.5kbps
Configurable via software

Transmit Packet Length

200Byte

-
Supports 32/64/128/200Byte sub-packet settings

Buffer Size

400Byte

Module Dimensions

16*26mm

-
SMD package, 1.27mm pin pitch

Hardware Design and Pin Definition 3.1 Pin Layout The E220P-400T22S adopts a 22-pin SMD package. The core pin definitions are as follows:

Pin Number
Name
Direction
Function Description

1/2/3/4/11/13/19/20/22

GND

Power ground

5
M0
Input (weak pull-up)
Used with M1 to set operating mode, can be grounded if not used

6
M1
Input (weak pull-up)
Used with M0 to set operating mode, can be grounded if not used

7
RXD
Input
UART receive, connects to TXD pin of external MCU

8
TXD
Output
UART transmit, connects to RXD pin of external MCU

9
AUX
Output
Module operating status indicator, can be used to wake up external MCU, can be left floating if not used

VCC

Power input, 2.3~5.5V DC

ANT

Antenna interface, connects to 50Ω impedance antenna

12/14-18

NC

No connection pins, no need to connect

3.2 Hardware Design Notes

Power Design: It is recommended to use a DC regulated power supply with as small ripple coefficient as possible, reserve more than 30% power margin, and ensure reliable grounding of the module.

Wiring Specification: High-frequency digital traces, analog traces and power lines should avoid passing under the module. If necessary, lay copper on the contact layer of the module and ground it well.

Antenna Deployment: The antenna should be exposed as much as possible and vertically upward. If installed in a metal case, use an antenna extension cable to lead the antenna out of the case to avoid signal attenuation.

Operating Modes and Function Description 4.1 Operating Mode Switching The module supports 4 operating modes, set by the level combination of M0 and M1 pins:

Mode
M1
M0
Function Description

0 (Normal Transmission Mode)
0
0
UART and wireless channel fully open, transparent transmission mode

1 (WOR Transmit Mode)
0
1
Supports wake-on-air, can send data to wake up devices in WOR receive mode

2 (WOR Receive Mode)
1
0
Wireless transmission off, only receives data, suitable for low-power battery-powered scenarios

3 (Deep Sleep Mode)
1
1
Cannot send/receive data, can enter register configuration mode

Mode switching takes effect 2ms after the AUX pin outputs high level. If the module is processing data, it will automatically switch to the new mode after data processing is completed.

4.2 Core Function Description
4.2.1 Fixed Transmission Mode
In fixed transmission mode, the module identifies the first 3 bytes of serial port received data as target address high byte + target address low byte + target channel, and only sends data to modules with the specified address and channel, realizing point-to-point directed communication.

4.2.2 Broadcast Transmission Mode
When the module address is set to 0xFFFF or 0x0000, as a transmitter, it can broadcast data to all modules under the same channel; as a receiver, it can monitor communication data of all modules under the same channel, suitable for group communication and network monitoring scenarios.

4.2.3 AUX Pin Function
The AUX pin is used to indicate the module operating status:

Low level indicates the module is busy (data transmission in progress, self-check initialization in progress), cannot switch operating mode

High level indicates the module is idle, mode switching and data transmission can be performed

When receiving data, AUX will pull low 2-3ms in advance to wake up the external MCU to prepare for data reception

Configuration Method and Register Description The module needs to enter deep sleep mode (M1=1, M0=1) for parameter configuration, supports 9600bps 8N1 serial communication format. The core command formats are as follows:

Command Type
Send Format
Return Format
Example

Set Register
C0 + start address + length + parameters
C1 + start address + length + parameters
Set channel to 0x09: send C0 05 01 09, return C1 05 01 09

Read Register
C1 + start address + length
C1 + start address + length + parameters
Read channel: send C1 05 01, return C1 05 01 09

Temporary Set Register
C2 + start address + length + parameters
C1 + start address + length + parameters
Parameters are only valid for the current power-on cycle, restore default values after restart

5.1 Core Register Description

Address
Name
Function Description

00H-01H
ADDH/ADDL
Module address, default 0x0000, supports broadcast/monitoring when set to 0xFFFF

02H
REG0
Configure UART baud rate (1200~115200bps), parity bit, air data rate (2.4~62.5kbps)

03H
REG1
Configure sub-packet length (32/64/128/200Byte), RSSI noise detection switch, transmit power (10~22dBm)

04H
REG2
Channel setting, 0-83 corresponds to 410.125~493.125MHz, step 1MHz

05H
REG3
Configure RSSI byte output, transmission mode (transparent/fixed), LBT monitoring, WOR cycle (500~4000ms)

06H-07H
CRYPT_H/CRYPT_L
Communication encryption key, write-only, cannot be read, ensuring data transmission security

5.2 Factory Default Parameters

Parameter Item
Default Value

Operating Frequency
433.125MHz

Module Address
0x0000

Air Data Rate
2.4kbps

Serial Baud Rate
9600bps, 8N1

Transmit Power
22dBm

Transmission Mode
Transparent transmission

Typical Application Scenarios The industrial-grade design of the E220P-400T22S makes it widely applicable to the following scenarios:

6.1 Smart Metering System
In remote water, electricity, gas and heat metering scenarios, the low-power feature of the module supports battery power supply, 7km communication range can cover large-scale residential areas, and encryption function ensures metering data security, greatly reducing manual meter reading costs.

6.2 Industrial Sensor Network
In factory environments, the module can connect to various temperature, humidity, pressure and liquid level sensors to realize wireless collection of production data. The anti-interference design ensures stable communication in complex electromagnetic environments, providing data support for industrial Internet platforms.

6.3 Building Automation
Used for wireless communication in intelligent lighting, elevator monitoring and fire alarm systems, avoiding complex wiring, supporting multi-node networking, and reducing construction difficulty and cost of building intelligent transformation.

6.4 Agricultural IoT
In field planting and livestock breeding scenarios, the module can connect to soil monitoring and environmental sensing equipment to realize remote data collection and equipment control. The low-power feature is suitable for field battery-powered deployment.

6.5 Intelligent Security System
Used for wireless anti-theft alarm, access control and video monitoring data backhaul. The long-distance communication feature is suitable for large-scale security deployment in parks and factories.

Frequently Asked Questions and Solutions 7.1 Short Communication Range Possible Causes:

Obstacles, same-band interference, or metal objects near the antenna

Air data rate set too high (higher rate leads to shorter transmission distance)

Insufficient power supply voltage, resulting in reduced transmit power

Poor antenna matching or low-quality antenna

Solutions:

Elevate the antenna installation height as much as possible, avoid obstacles and interference sources

Reduce the air data rate, adjust the transmit power to the maximum value

Ensure the power supply voltage is ≥5V, use a regulated power supply

Replace a matched high-gain antenna, use an antenna extension cable when deployed inside a metal case

7.2 Module Easy to Damage
Possible Causes:

Power supply voltage exceeds 5.5V or reverse polarity connection

Unreleased static electricity causing chip breakdown

Operating environment humidity too high or temperature out of range

Solutions:

Add over-voltage and reverse polarity protection circuits, strictly control the power supply voltage

Implement electrostatic protection during installation and operation, ensure good module grounding

Avoid using in environments exceeding the -40℃~+85℃ range

7.3 High Bit Error Rate
Possible Causes:

Same-frequency signal interference nearby

Unstable power supply causing communication abnormalities

Antenna extension cable too long or poor quality

Solutions:

Switch the communication channel to avoid interference frequency bands

Optimize power supply design, add filter capacitors

Shorten the antenna feeder length, use low-loss coaxial cable

Selection Reference and Peer Comparison 8.1 Peer Product Parameter Comparison

Product Model
Core Chip
Transmit Power
Maximum Communication Range
Receive Current
Package Size

E220P-400T22S
LLCC68
22dBm
7km
11mA
16*26mm

E220-400T30S
LLCC68
30dBm
10km
12mA
18*28mm

Competitor SX1276 Module
SX1276
20dBm
5km
15mA
17*26mm

8.2 Matching Antenna Recommendations
Ebyte officially provides a variety of matching antennas for selection:

Antenna Model
Type
Gain
Application Scenario

TX433-JZ-5
Rubber Antenna
2.0dBi
Short-distance devices, handheld terminals

TX433-JK-20
Rubber Antenna
3.0dBi
Medium-distance transmission, fixed equipment

TX433-XPH-300
Suction Cup Antenna
6.0dBi
Long-distance transmission, outdoor deployment

About Ebyte
Chengdu Ebyte Electronic Technology Co., Ltd. is a national high-tech enterprise focusing on wireless communication applications. Its products cover the full range of wireless modules including LoRa, Bluetooth, Wi-Fi and 5G, which are widely used in industrial IoT, smart home, smart agriculture and other fields. The company has established technical cooperation with multiple universities around the world, and its products have passed international certifications such as FCC, CE and RoHS, and are exported to more than 160 countries and regions. It can provide customers with customized development and one-stop wireless communication solutions.

Official Website: https://www.cdebyte.com

Technical Support: support@cdebyte.com

Address: Building B5, Mould Park, 199 Xiqu Avenue, High-tech Zone, Chengdu, Sichuan, China