E160-TxF12S2 OOK Wireless Transmitter Module In-depth Analysis

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

1. 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.

1. 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.

1. 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.

1. 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.

1. 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.

1. 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.

1. 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.

1. 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

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