Help with decoding and supporting Havells LLOYD GLS12I3FWAEV AC Units

[amithkk]

Hi, this library has served me very well with other HVAC units, however, I seem to have stumbled upon a unit that does not yet have support. Here are some details of the unit and it's remote:

Amazon Listing - https://www.amazon.in/gp/product/B0BRKX6FD5/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

As described in the readme, I've set up Raw-IR-decoder-for-Arduino on an Arduino Uno with the TSOP38238 acting as an IR Reciever.

However, I have tried the options 1-6, and none of them give me decoded output containing a pair of "Hh" (Options 1,3,4,5 gives me individual "h's scattered throughout the dump with no hexadecimal output)

Options 2 (Panasonic CKP, Midea etc. codes) and 6 (ZH/JG-01 codes) gives me hexadecimal output, but with no "h", "H" or "Hh" pairs. Here is some annotated output from using Option 6:

// ON, 24, COOL, FAN AUTO, VSWING ON, LIGHTS ON
 001101100000111111101000100001110011000000000000000000000000000000000000000010001000000000000000000000000000000010010011
 Bytes:
 00:  0011|0110 | 6C | 01101100 
 01:  0000|1111 | F0 | 11110000 
 02:  1110|1000 | 17 | 00010111 
 03:  1000|0111 | E1 | 11100001 
 04:  0011|0000 | 0C | 00001100 
 05:  0000|0000 | 00 | 00000000 
 06:  0000|0000 | 00 | 00000000 
 07:  0000|0000 | 00 | 00000000 
 08:  0000|0000 | 00 | 00000000 
 09:  0000|1000 | 10 | 00010000 
 10:  1000|0000 | 01 | 00000001 
 11:  0000|0000 | 00 | 00000000 
 12:  0000|0000 | 00 | 00000000 
 13:  0000|0000 | 00 | 00000000 
 14:  1001|0011 | C9 | 11001001 
 6C,F0,17,E1,0C,00,00,00,00,10,01,00,00,00,C9
 Timings (in us): 
 PAUSE SPACE:  0
 HEADER MARK:  0
 HEADER SPACE: 0
 BIT MARK:     988
 ZERO SPACE:   560
 ONE SPACE:    2546
 Decoding known protocols...
 Unknown protocol
 Bytecount: 15


// OFF, 24, COOL, FAN AUTO, VSWING ON, LIGHTS ON
 001101100000111111101000000001110011000000000000000000000000000000000000000010001000000000000000000000000000000000010011
 Bytes:
 00:  0011|0110 | 6C | 01101100 
 01:  0000|1111 | F0 | 11110000 
 02:  1110|1000 | 17 | 00010111 
 03:  0000|0111 | E0 | 11100000 
 04:  0011|0000 | 0C | 00001100 
 05:  0000|0000 | 00 | 00000000 
 06:  0000|0000 | 00 | 00000000 
 07:  0000|0000 | 00 | 00000000 
 08:  0000|0000 | 00 | 00000000 
 09:  0000|1000 | 10 | 00010000 
 10:  1000|0000 | 01 | 00000001 
 11:  0000|0000 | 00 | 00000000 
 12:  0000|0000 | 00 | 00000000 
 13:  0000|0000 | 00 | 00000000 
 14:  0001|0011 | C8 | 11001000 
 6C,F0,17,E0,0C,00,00,00,00,10,01,00,00,00,C8
 Timings (in us): 
 PAUSE SPACE:  0
 HEADER MARK:  0
 HEADER SPACE: 0
 BIT MARK:     984
 ZERO SPACE:   559
 ONE SPACE:    2546
 Decoding known protocols...
 Unknown protocol
 Bytecount: 15

// ON, 25, COOL, FAN AUTO, VSWING ON, LIGHTS ON
 001101100000111111101000100001110011001000000000000000000000000000000000000010001000000000000000000000000000000010010001
 Bytes:
 00:  0011|0110 | 6C | 01101100 
 01:  0000|1111 | F0 | 11110000 
 02:  1110|1000 | 17 | 00010111 
 03:  1000|0111 | E1 | 11100001 
 04:  0011|0010 | 4C | 01001100 
 05:  0000|0000 | 00 | 00000000 
 06:  0000|0000 | 00 | 00000000 
 07:  0000|0000 | 00 | 00000000 
 08:  0000|0000 | 00 | 00000000 
 09:  0000|1000 | 10 | 00010000 
 10:  1000|0000 | 01 | 00000001 
 11:  0000|0000 | 00 | 00000000 
 12:  0000|0000 | 00 | 00000000 
 13:  0000|0000 | 00 | 00000000 
 14:  1001|0001 | 89 | 10001001 
 6C,F0,17,E1,4C,00,00,00,00,10,01,00,00,00,89
 Timings (in us): 
 PAUSE SPACE:  0
 HEADER MARK:  0
 HEADER SPACE: 0
 BIT MARK:     994
 ZERO SPACE:   552
 ONE SPACE:    2540
 Decoding known protocols...
 Unknown protocol
 Bytecount: 15


// OFF, 25, COOL, FAN AUTO, VSWING ON, LIGHTS ON
 001101100000111111101000000001110011001000000000000000000000000000000000000010001000000000000000000000000000000000010001
 Bytes:
 00:  0011|0110 | 6C | 01101100 
 01:  0000|1111 | F0 | 11110000 
 02:  1110|1000 | 17 | 00010111 
 03:  0000|0111 | E0 | 11100000 
 04:  0011|0010 | 4C | 01001100 
 05:  0000|0000 | 00 | 00000000 
 06:  0000|0000 | 00 | 00000000 
 07:  0000|0000 | 00 | 00000000 
 08:  0000|0000 | 00 | 00000000 
 09:  0000|1000 | 10 | 00010000 
 10:  1000|0000 | 01 | 00000001 
 11:  0000|0000 | 00 | 00000000 
 12:  0000|0000 | 00 | 00000000 
 13:  0000|0000 | 00 | 00000000 
 14:  0001|0001 | 88 | 10001000 
 6C,F0,17,E0,4C,00,00,00,00,10,01,00,00,00,88
 Timings (in us): 
 PAUSE SPACE:  0
 HEADER MARK:  0
 HEADER SPACE: 0
 BIT MARK:     987
 ZERO SPACE:   556
 ONE SPACE:    2539
 Decoding known protocols...
 Unknown protocol
 Bytecount: 15


// ON, 23, COOL, FAN AUTO, VSWING ON, LIGHTS ON
 001101100000111111101000100001110010111000000000000000000000000000000000000010001000000000000000000000000000000010010101
 Bytes:
 00:  0011|0110 | 6C | 01101100 
 01:  0000|1111 | F0 | 11110000 
 02:  1110|1000 | 17 | 00010111 
 03:  1000|0111 | E1 | 11100001 
 04:  0010|1110 | 74 | 01110100 
 05:  0000|0000 | 00 | 00000000 
 06:  0000|0000 | 00 | 00000000 
 07:  0000|0000 | 00 | 00000000 
 08:  0000|0000 | 00 | 00000000 
 09:  0000|1000 | 10 | 00010000 
 10:  1000|0000 | 01 | 00000001 
 11:  0000|0000 | 00 | 00000000 
 12:  0000|0000 | 00 | 00000000 
 13:  0000|0000 | 00 | 00000000 
 14:  1001|0101 | A9 | 10101001 
 6C,F0,17,E1,74,00,00,00,00,10,01,00,00,00,A9
 Timings (in us): 
 PAUSE SPACE:  0
 HEADER MARK:  0
 HEADER SPACE: 0
 BIT MARK:     970
 ZERO SPACE:   566
 ONE SPACE:    2553
 Decoding known protocols...
 Unknown protocol
 Bytecount: 15


// ON, 22, COOL, FAN AUTO, VSWING ON, LIGHTS ON
 001101100000111111101000100001110010110000000000000000000000000000000000000010001000000000000000000000000000000010010111
 Bytes:
 00:  0011|0110 | 6C | 01101100 
 01:  0000|1111 | F0 | 11110000 
 02:  1110|1000 | 17 | 00010111 
 03:  1000|0111 | E1 | 11100001 
 04:  0010|1100 | 34 | 00110100 
 05:  0000|0000 | 00 | 00000000 
 06:  0000|0000 | 00 | 00000000 
 07:  0000|0000 | 00 | 00000000 
 08:  0000|0000 | 00 | 00000000 
 09:  0000|1000 | 10 | 00010000 
 10:  1000|0000 | 01 | 00000001 
 11:  0000|0000 | 00 | 00000000 
 12:  0000|0000 | 00 | 00000000 
 13:  0000|0000 | 00 | 00000000 
 14:  1001|0111 | E9 | 11101001 
 6C,F0,17,E1,34,00,00,00,00,10,01,00,00,00,E9
 Timings (in us): 
 PAUSE SPACE:  0
 HEADER MARK:  0
 HEADER SPACE: 0
 BIT MARK:     978
 ZERO SPACE:   556
 ONE SPACE:    2549
 Decoding known protocols...
 Unknown protocol
 Bytecount: 15


// ON, 21, COOL, FAN AUTO, VSWING ON, LIGHTS ON
 Bytes:
 00:  0011|0110 | 6C | 01101100 
 01:  0000|1111 | F0 | 11110000 
 02:  1110|1000 | 17 | 00010111 
 03:  1000|0111 | E1 | 11100001 
 04:  0010|1010 | 54 | 01010100 
 05:  0000|0000 | 00 | 00000000 
 06:  0000|0000 | 00 | 00000000 
 07:  0000|0000 | 00 | 00000000 
 08:  0000|0000 | 00 | 00000000 
 09:  0000|1000 | 10 | 00010000 
 10:  1000|0000 | 01 | 00000001 
 11:  0000|0000 | 00 | 00000000 
 12:  0000|0000 | 00 | 00000000 
 13:  0000|0000 | 00 | 00000000 
 14:  1001|1001 | 99 | 10011001 
 6C,F0,17,E1,54,00,00,00,00,10,01,00,00,00,99
 Timings (in us): 
 PAUSE SPACE:  0
 HEADER MARK:  0
 HEADER SPACE: 0
 BIT MARK:     961
 ZERO SPACE:   577
 ONE SPACE:    2558
 Decoding known protocols...
 Unknown protocol
 Bytecount: 15

On a cursory glance, it looks like the last byte is some sort of checksum, the 4th byte seems to control ON/OFF and the 5th byte seems to have influence on temperature (however I don't see any pattern related to the numbers that match up)

I'd like to add support for this model, however I am unsure how to proceed with the reverse engineering. I'm happy to provide any other captures. Once decoded, I can also attempt to create a PR with support for this system.