Arduino LEGO IR Power Functions Receiver

Arduino Library for receiving commands from various Lego IR controllers

Usage

Hardware

Aruino UNO, breadboard and jumper wires
LEGO IR Power Functions IR Remote Control or IR Speed Remote Control [1]
IR sensor tuned to 38KHz, eg. a TSOP38238 [2]

Then, wire up your IR remote control receiver (half-sphere looking up)

connect the IR middle pin to Arduino GND
connect the IR right pin to Arduino V3.3
connect the IR left pin to Arduino input pin 2

Software

Load the ArduinoLegoIrReceiver.ino file into your Arduino IDE:

#include "LegoRemoteReceiver.h"

LegoRemoteReceiver lrr;

void setup() {
  Serial.begin(9600);
  Serial.println("ready to receive lego ir commands");
  lrr.setCallback(actOnCommand);
}

void loop() {
  lrr.loop();
}

void actOnCommand() {
  if(lrr.getChannel().equals("00") &&
     lrr.getMode().equals("110") &&
     lrr.getData().equals("0100"))
  {
    Serial.println("channel 1, left control wheel clockwise turn");
  }
  else {
    Serial.print("channel="); Serial.print(lrr.getChannel());
    Serial.print(" mode="); Serial.print(lrr.getMode());
    Serial.print(" data="); Serial.print(lrr.getData());
    Serial.println();
  }
}

Change the code in method actOnCommand according to the nees of your project.

Sources

To build the library information from the following sites have been used:

IR remote control receiver module hardware [2]
General introduction into decoding IR signals with Arduino [3]
Lego press release to open source their IR spec [4]
The Lego IR receiver spec [5]

References

[1] http://shop.lego.com/en-US/LEGO-Power-Functions-IR-Speed-Remote-Control-8879
[2] https://www.adafruit.com/products/157
[3] https://learn.adafruit.com/ir-sensor/using-an-ir-sensor
[4] http://www.technicbricks.com/2008/01/power-functions-rc-protocol-released-as.html
[5] http://storage.technicbricks.com/Media/2008/TBs_20080125_1/LEGO%20Power%20Functions%20RC%20v100.pdf

matthiaszimmermann / ArduinoLegoIrReceiver