IR decoder

Decodes long IR codes, for example from air conditioner / heat pump devices.

Shows the timings, the symbols, and also the decoded signal for certain air conditioners.

Required hardware:

Arduino (any compatible will do, but Arduino Uno or Nano is easiest for prototyping)
Infrared receiver, for example VS1838 will do fine, see also https://arduino-info.wikispaces.com/IR-RemoteControl
Breadboard, wiring
IR remote control from the aircon/heatpump you plan to decode

Build instructions

Defines for the different brands were introduced to limit the memory footage on a Arduino UNO. Uncomment, in the beginning of the sketch, the define for your remote brand. You will get a compiler error if you forget to uncomment!

//#define MITSUBISHI_ELECTRIC
//#define FUJITSU
//#define MITSUBISHI_HEAVY
//#define DAIKIN
//#define SHARP_
//#define CARRIER
//#define PANASONIC_CKP
//#define PANASONIC_CS
//#define HYUNDAI
//#define GREE
//#define GREE_YAC
//#define FUEGO
//#define TOSHIBA
//#define NIBE
//#define AIRWELL
//#define HITACHI
//#define SAMSUNG
//#define BALLU
//#define AUX
//#define ZHLT01_REMOTE
//#define PHILCO

Arduino IDE

Open the sketch from subdirectory 'rawirdecode' in Arduino IDE and build

PlatformIO

platformio.ini contains build definitions for Arduino Mega, ESP32 (both tested on M5STACK ATOM LITE) and ESP8266 (tested on nodemcu)
On Mega, connect the receiver data pin to GPIO 2
On ESP32, connect the receiver data pin to GPIO 25
On ESP8266, connect the receiver data pin to GPIO 5

Instructions

Connect an IR receiver into the Arduino
Start the sketch, and enter 1, 2, 3, 4 or 5 into the 'Serial Monitor', to select which timings to use
- Try out the alternatives until you get sensible output
- The signal should always start with 'Hh', and within the signal there should only be a couple of 'Hh' pairs (if any)
- 'H' and 'h' should be there only in pairs 'Hh'
- 'H' stands for 'header mark' and 'h' for 'header space'
Point your IR remote to the IR receiver and send the code
- If the symbols are known, then the decoder shows its meaning on the serial monitor
- If the symbols are unknown, then you can help by writing a decoder for the unknown remote

-> Mode '9' can be used to decode known signals, in that case you can send the symbols from the terminal, like entering this:

Hh001101011010111100000111001001010100000000000111000000001111111011010100000001000111001011

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