Kelon AC IR command decoder

kelon_decoder.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys

MODES = {
    0: "heat",
    1: "smart",
    2: "cool",
    3: "dehum",
    4: "fan"
}

FAN_SPEEDS = {
    0: "auto",
    1: "max",
    2: "medium",
    3: "min"
}

if __name__ == "__main__":
    numstr = sys.argv[1]
    num = int(numstr, 0)

    num >>= 16  # Strip preamble

    print(f"Fan speed: {FAN_SPEEDS[num & 0b11]}")
    num >>= 2

    print(f"Power: {'pressed' if num & 1 else 'not pressed'}")
    num >>= 1

    print(f"Sleep: {'on' if num & 1 else 'off'}")
    num >>= 1

    print(f"Dehum intensity: {'-' if num & 0b100 == 0b100 else '+'}{num & 0b11}")
    num >>= 3

    print(f"Swing: {'pressed' if num & 1 else 'not pressed'}")
    num >>= 1

    print(f"Mode: {MODES[num & 0b111]}")
    num >>= 3

    print(f"Timer: {'on' if num & 1 else 'off'}")
    num >>= 1

    print(f"Temperature: {(num & 0b1111) + 18}°C")
    num >>= 4

    timer_half = num & 1
    num >>= 1
    timer_hour = num & 0b111111
    num >>= 6

    timer_time = 0
    if timer_hour >= 10:
        timer_time = (timer_hour << 1 | timer_half) - 10
    else:
        timer_time = timer_hour + (0.5 if timer_half else 0)

    print(f"Timer duration: {timer_time}h")

    print(f"Smart mode: {'on' if num & 1 else 'off'}")
    num >>= 5  # Also strip unknown always-zero bits

    if num & 0b1001 == 0b1001:
        print(f"Supercool mode: on")
    elif num & 0b1000 == 0b1000 or num & 0b0001 == 0b0001:
        print(f"Supercool mode might be on but wtf")
    else:
        print(f"Supercool mode: off")