tbhv110_decoder.py

def dict_from_payload(base64_input: str, fport: int = None):
    """ Healthy Home Sensor IAQ (TBHV110) binary payload decoder """
    
    decoded = base64.b64decode(base64_input)

    # Byte 0, bit 0
    status = decoded[0] & 0b00000001  # (1 << 1) - 1

    # Byte 1, bits 3:0
    battery = decoded[1] & 0b00001111  # (1 << 4) - 1
    battery = (25 + battery) / 10

    # Byte 2, bits 6:0
    board_temp = decoded[2] & 0b01111111  # (1 << 7) - 1
    board_temp = board_temp - 32

    # Byte 3, bits 6:0
    rh = decoded[3] & 0b01111111  # (1 << 7) - 1

    # Byte 5-4, bits 15:0
    eco2 = decoded[5] << 8 | decoded[4]

    # Byte 7-6, bits 15:0
    voc = decoded[7] << 8 | decoded[6]

    # Byte 9-8, bits 15:0
    iaq = decoded[9] << 8 | decoded[8]

    # Byte 10, bits 6:0
    env_temp = decoded[10] & 0b1111111  # (1 << 7) - 1
    env_temp = env_temp - 32
    
    result = {
        'Status': status,
        'Battery': battery,
        'BoardTemp': board_temp,
        'RH': rh,
        'ECO2': eco2,
        'VOC': voc,
        'IAQ': iaq,
        'EnvTemp': env_temp,
    }

    return result