ESP8266 IR Sensor IoT Project with KiwisIoT

#iot #arduino #esp8266 #ir

Introduction

This project uses an ESP8266 NodeMCU and an IR sensor to detect objects in real time. The detection status is sent to the KiwisIoT dashboard through Wi-Fi.

Components Required

ESP8266 NodeMCU
IR sensor module
Jumper wires
USB cable
Computer

Software Requirements

Arduino IDE
ESP8266 board package
KiwisIoT Arduino library
KiwisIoT account
Wi-Fi connection

CIRCUIT DIAGRAM

How It Works

The IR sensor detects whether an object is present.
The ESP8266 reads the sensor's digital output.
The system identifies the status as DETECTED or NOT DETECTED.
The ESP8266 sends the status to KiwisIoT over Wi-Fi.
The dashboard displays the detection status for remote monitoring.

In this project, a LOW signal indicates that an object has been detected, while a HIGH signal indicates that no object is detected.

ARDUINO CODE:

#include <ESP8266WiFi.h>
#include <KiwisIoT.h>

const char* ssid = "YOUR_WIFI_NAME";
const char* pass = "YOUR_WIFI_PASSWORD";

const char* topic = "YOUR_DASHBOARD_TOPIC_ID";

#define IR_PIN D7

KiwisIoT kiwisiot(ssid, pass, topic);

void sendObjectStatus() {
  int irState = digitalRead(IR_PIN);
  String objectStatus;

  if (irState == LOW) {
    objectStatus = "DETECTED";
  } else {
    objectStatus = "NOT DETECTED";
  }

  Serial.println();
  Serial.println("---------- IR MONITORING ----------");

  Serial.print("IR Sensor Value: ");
  Serial.println(irState);

  Serial.print("Object Status: ");
  Serial.println(objectStatus);

  kiwisiot.send("0", objectStatus);

  Serial.print("Sent to KiwisIoT Channel 0: ");
  Serial.println(objectStatus);
}

void setup() {
  Serial.begin(115200);

  Serial.println();
  Serial.println("     IR OBJECT MONITORING     ");

  pinMode(IR_PIN, INPUT);

  Serial.println("IR sensor initialized");
  Serial.println("Connecting to KiwisIoT...");

  kiwisiot.begin();

  Serial.println("KiwisIoT initialized");
  Serial.println("Starting object monitoring...");
}

void loop() {
  kiwisiot.run();

  static unsigned long lastSend = 0;

  if (millis() - lastSend >= 2000) {
    lastSend = millis();
    sendObjectStatus();
  }

  delay(100);
}

Applications

Object detection
Entry monitoring
Smart parking concepts
Obstacle detection
Automation projects
IoT monitoring systems

What I Learned

Through this project, I learned how to connect an IR sensor to an ESP8266, read digital sensor values, and send sensor data to an IoT dashboard.

I used the reference to understand the concept and implement the project.

GitHub Reference:https://github.com/Kiwistron/KiwisIoT-Projects/tree/main/esp8266/002-ir-kiwisiot

My GitHub Repository: https://github.com/bala02102008/IR-Sensor-IoT-Project-using-KiwisIoT-

Conclusion

This project demonstrates how basic sensors and Wi-Fi connectivity can be combined with an IoT platform for real-time object monitoring.

I hope this project helps beginners explore IoT and embedded systems.

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