Wamsler-IR-Remote

I have got a Wamsler / Westminster Quattro 6 pellet stove with a IR-Remote. I wanted to reverse-engineer the transmission-code, this is the result with big help from mikrocontroller.net. The control unit is based on the Duepi Evo line.

This is how a transmission telegram might look:

The "short" impulses are a logigal 0, the "long" impulses are a logical 1. So a telegram might look like the following:

111100111000111000110011010110001001100010101101000101010000110011111011

protocall explenation

area	explenation	calculation	unit
bit 0 to 1	currently unknown
bit 2	timer "auto"	1 = true, 0 = false
bit 3	stove on / off	1 = on, 0 = off
bit 4	"turbo" mode on / off	1 = on, 0 = off
bit 5 to 7	blower level	1 + binToDec; 6 = AUTO
bit 8	"econo" mode on / off	1 = on, 0 = off
bit 9	currently unknown
bit 10 to 15	temperature	7 + binToDec	°C
bit 16 to 20	timer 1 ON hour	binToDec	hours
bit 21 to 23	timer 1 ON minute	binToDec * 10	minutes
bit 24 to 28	timer 1 OFF hour	binToDec	hours
bit 29 to 31	timer 1 OFF minute	binToDec * 10	minutes
bit 32 to 36	timer 2 ON hour	binToDec	hours
bit 37 to 39	timer 2 ON minute	binToDec * 10	minutes
bit 40 to 44	timer 2 OFF hour	binToDec	hours
bit 45 to 47	timer 2 OFF minute	binToDec * 10	minutes
bit 48 to 49	currently unknown, maybe part of 50..55
bit 50 to 55	hour of day	binToDec	hours
bit 56 to 57	currently unknown, maybe part of 59..64
bit 59 to 63	minute of day	binToDec	minutes
bit 64	timer 1 ON active	1 = true, 0 = false
bit 65	timer 1 OFF active	1 = true, 0 = false
bit 66	timer 2 ON active	1 = true, 0 = false
bit 67	timer 1 OFF active	1 = true, 0 = false
bit 68 to 71	custom checksum	see below

I build a simple decoder in excel, provided here.

There is also a prototype of a encoder available under src.

custom checksum

To calculate the "checksum", add the first 17 nibbles without overflow. See "calcPruefsumme()" in src/telegram.cpp !

arduino library

There is a simple prototype of an arduino library available, see arduino_library. How to use: Creaty a new folder called "telegram" in .../Arduino/libraries/. Copy all contents from arduino_library inside. Then load the example script:

#include <telegram.h>

myTelegram t = myTelegram(13);

void setup() {
  t.AUTOTimer = true;
  t.setBlowerLevel(3);
  t.OnOff = true;
  t.Turbo = false;
  t.setTemperature(21);
  t.setTimer1on(6, 30);
  t.setTimer1off(11, 00);
  t.setTimer2on(19, 00);
  t.setTimer2off(21, 50);
  t.setTime(20, 3);
  t.timer1onActive = true;
  t.timer1offActive = true;
  t.timer2onActive = true;
  t.timer2offActive = true;

  Serial.begin(9600);
  Serial.println(t.toString());
  
  t.sendTelegram();
  
  }

void loop() {

}

tipp: connect to the stove via serial interface...

...as it was done by aceindy. This is just a reference for your information.