SHARP-CRMC-A489JBE0-AirCon-Remote-codes-for-LIRC

This repository centers around the SHARP CRMC-A489JBE0 airconditioner remote and integrating it with LIRC.

These scripts create raw lirc codes and decode mode2 input from the remote. I also didnt bother with any of the timing functionality - see below.

encode.py

Given parameters, generate raw codes that can be put into LIRC configuration files. (you can also irrecord -a the final file to make it non-raw)

Example usage:

python3 encode.py --mode 1 --temp 26 --power 2 --swing

Options:

  -h, --help          show this help message and exit
  --temp [[18-32]]    an integer tempreture 18-32 degrees (only applies for heat and cool, default
                      23)
  --mode [[0-4]]      Which mode? 0 = auto, 1 = heat, 2 = cool, 3 = dehumidify, 4 = fan
  --autotemp [[0-4]]  which level of heating/cooling? 0 = off, 1 = coldest, 2 = cold, 3 = hot, 4 =
                      hottest (only applies to auto and dehumidify modes, defaults to off)
  --speed [[0-3]]     Which Fan Speed? 0 = auto, 1 = slow, 2 = medium, 3 = fast (auto not available
                      in fan mode, defaults to slow)
  --power [[0-2]]     Which command? 0 = off, 1 = on, 2 = update only
  --swing             Change swing setting?

decode.py

Decodes output of mode2 to binary to help decipher the remote codes. Example usage:

mode2 --driver default --device /dev/lirc-rx | python3 -u ./decode.py

Output resembles:

0 000 111 101 101 110 111 011 111 111 110 1*
0 001 000 010 010 001 000 100 000 000 001 0|
0 000 111 101 101 110 111 011 111 111 110 1* 

(above example - heat off 26 degrees)

Decoded IR codes explination

SHARP CRMC-A489JBE0

mode2 output key
gap (pulse) = 435
short (space) = 1620
long (space) = 3700
margin (space) = 150

seperator (space) = 20000

IR codes are encoded into space length - short 0 long 1

Here is the typical output of the AC remote (turn on to mode:fan speed slow):

A   B  C   D    E F   G H   I     J    K   L  
000 01 111 1110 1 011 1 110 11111 1111 110 *  
000 10 000 0001 0 100 0 001 00000 0000 001 |  
000 01 111 1110 1 011 1 110 11111 1111 110 *  

000 01 111 1101 1 011 1 110 11111 1111 110 |  
000 10 000 0010 0 100 0 001 00000 0000 001 |  
000 01 111 1101 1 011 1 110 11111 1111 110 |  

Each line is the same, used to verify transmission the second line is flipped compared to the first and last.
For the sake of simplicity, I focus on the first (and also last) lines.
I also didnt bother with the timer of the remote, so there are a few "unknowns"

I also split up one time commands from codes.

• Commands are sent only depending what button is pushed
• Codes are sent for every key push

Each section broken down

A:

• Buffer - start space 000

B:

• Unkown - always 01

C:

• Temp Auto / dehumidifier code
• 101 = highest
• 110 = higher
• 111 = normal (for other modes)
• 010 = lower
• 001 = lowest

D:

• Temp Val code (cool, heat)
• 1111 = Auto mode only
• 1110 = 18 (fan and dehumidifier modes)
• 1101 = 19
• 1100 = 20
• 1011 = 21
• 1010 = 22
• 1001 = 23
• 1000 = 24
• 0111 = 25
• 0110 = 26
• 0101 = 27
• 0100 = 28
• 0011 = 29
• 0010 = 30
• 0001 = 31
• 0000 = 32

E:

• Unkown - always 1

F:

• Mode code
• 111 = auto
• 110 = heat
• 101 = cool
• 100 = dehumidify
• 011 = fan

G:

• Unkown - always 1

H:

• Fan Speed code
• 010 = Fast
• 100 = Medium
• 110 = Slow
• 111 = Auto (not for fan mode)

I:

• Unkwon - always 11111 - possibly timer

J:

• Swing command (only works with update settings)
• 0001 = Change swing mode
• 1111 = do not change swing mode

K:

• Power command
• 110 = Turn On
• 101 = Turn Off
• 100 = Update settings (stay on)

L:

• Seperator - 20,000 ms space