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Remote Control (IR Receiver) | NexaLearn IoT Lab | NexaLearn

Input & Control20 دقيقة

Remote Control (IR Receiver)

Control your projects using an old TV remote.

Lesson Content

An infrared receiver (like TSOP1838) reads invisible flashes from the remote and converts them to codes (Hex Codes). Every button on any remote emits a unique code. Using the IRremote.h library, we can decode this code and execute a command (e.g., if the code is FFA25D, turn on the light).

Components Needed

Arduino UnoIR ReceiverIR Remote

Wiring Notes

The IR receiver has 3 legs: VCC, GND, and Signal. Connect the Signal leg to any digital pin.

Code Example

#include <IRremote.h>
const int RECV_PIN = 11;
IRrecv irrecv(RECV_PIN);
decode_results results;
void setup() {
  Serial.begin(9600);
  irrecv.enableIRIn();
}
void loop() {
  if (irrecv.decode(&results)) {
    Serial.println(results.value, HEX);
    irrecv.resume();
  }
}

Common Mistakes

Direct sunlight or strong fluorescent lights emit infrared rays that can interfere with the sensor and prevent it from responding.

Next Lesson

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