KY-032 Smart IR Obstacle Detection Module

Description

KY-032 Smart IR Obstacle Detection Module

The KY-032 emits infrared light from its IR transmitter. When the light hits an obstacle, it is reflected and detected by the IR receiver. When an obstacle is detected, the module sends a digital LOW signal on its output pin. The built-in potentiometers adjust the detection sensitivity and IR emission intensity.

Applications

• Robotics: obstacle avoidance for autonomous robots
• Security systems: presence detection and monitoring
• DIY projects: obstacle detection in prototypes and other builds
• Industrial automation: object detection and control

Using the KY-032 with Arduino Uno

Basic example components

• 1 × KY-032 sensor
• 1 × Arduino Uno
• Jumper wires
• Breadboard

Basic Arduino code

int sensorPin = 8; // Broche connectée à la sortie du capteur
int ledPin = 13;  // Broche connectée à la LED intégrée


void setup() {
  pinMode(sensorPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}


void loop() {
  int sensorValue = digitalRead(sensorPin);
  if (sensorValue == LOW) {
    digitalWrite(ledPin, HIGH);
    Serial.println("Obstacle détecté");
  } else {
    digitalWrite(ledPin, LOW);
    Serial.println("Pas d'obstacle");
  }
  delay(1000);
}

Basic code explanation

1. Pin setup: sensorPin is configured as an input and ledPin as an output.
2. Read the sensor: when an obstacle is detected (LOW signal), the built-in LED turns on and a message is printed to the Serial Monitor.
3. Main loop: the sensor is read continuously; the LED turns on or off according to the detection result.

Basic pinout

• GND: connect to Arduino GND
• VCC: connect to Arduino 5V
• S: connect to Arduino digital pin 8
• EN: leave unconnected; the sensor is enabled by default

Advanced example components

• 1 × KY-032 sensor
• 1 × Arduino Uno
• 1 × 1602 I2C LCD
• Jumper wires
• Breadboard

Advanced code with 1602 I2C LCD

#include <Wire.h>
#include <LiquidCrystal_I2C.h>


int sensorPin = 8; // Broche connectée à la sortie du capteur
LiquidCrystal_I2C lcd(0x27, 16, 2);


void setup() {
  lcd.begin();
  lcd.backlight();
  pinMode(sensorPin, INPUT);
  Serial.begin(9600);
}


void loop() {
  int sensorValue = digitalRead(sensorPin);
  lcd.setCursor(0, 0);
  if (sensorValue == LOW) {
    lcd.print("Obstacle detecte");
    Serial.println("Obstacle détecté");
  } else {
    lcd.print("Pas d'obstacle ");
    Serial.println("Pas d'obstacle");
  }
  delay(1000);
}

Advanced code explanation

1. Initialize libraries: use Wire and LiquidCrystal_I2C for the I2C LCD.
2. Set up pins and display: configure the sensor pin and initialize the LCD.
3. Main loop: read the obstacle-detection state and show the result on the LCD and Serial Monitor.

Advanced pinout

• GND: connect to Arduino GND
• VCC: connect to Arduino 5V
• S: connect to Arduino digital pin 8
• SDA (LCD): connect to Arduino A4
• SCL (LCD): connect to Arduino A5

Installing the library

1. Open the Arduino IDE.
2. Choose Sketch → Include Library → Manage Libraries.
3. Search for LiquidCrystal_I2C and install the library by Frank de Brabander.

Keywords: obstacle avoidance, sensor, collision prevention, obstacle detection, robot obstacle avoidance, proximity sensor, IR module, robot automation, adjustable sensor, IR technology.