Support of T902

[petrkr]

Is your feature request related to a problem? Please describe.
Nope, only problem is missing device :)

Describe the solution you'd like
Help with understand this code and implement T902 model to here based on my sniffing and example-proof-of-concept working code.

Additional context

https://buythermopro.com/products/tp920-bluetooth-wireless-meat-thermometer

There is some init sequence, which I need to send without it T902 wont start sending data even notify is requested. Probably some auth? Do not know, just blindly send them as-sniffed-ones.

GATT UUIDs

# TP902 GATT UUIDs
SERVICE_UUID = "1086fff0-3343-4817-8bb2-b32206336ce8"
WRITE_UUID = "1086fff1-3343-4817-8bb2-b32206336ce8"  # handle 0x0018
NOTIFY_UUID = "1086fff2-3343-4817-8bb2-b32206336ce8"  # handle 0x001a

Init sequence, but really do not know what those data are

INIT_SEQUENCE = [
    bytes.fromhex("01098a7a13b73ed68b67c2a0"),  # This is only one needed, others will be some configs
#    bytes.fromhex("410041"),
#    bytes.fromhex("28040b685b8c86"),
]

Write registers (sniffed, guessed)

#    bytes.fromhex("20010c2d"), # Probably settings of C/F unit
#    bytes.fromhex("23060100ffffffff26"), # Write settings T1 alarm range / type (in this case disabled)
#    bytes.fromhex("23060200ffffffff27"), # Write settings T2 alarm range / type (in this case disabled)

Read of alarm (guessed)

  TX >> [24010126] cmd=0x24 len=1 data=01
  RX << [2406018211970809660000000000510f0400392e] alarm_read ch1: RANGE(130) lo=80.9°C hi=119.7°C
  TX >> [24010227] cmd=0x24 len=1 data=02
  RX << [2406020a074000007d0000000000510f0400be3a] alarm_read ch2: TARGET(10) target=74.0°C

Already have parsed some data (battery is just guess, rest hex I do not know what they are)

Notify temperature, every 1-2 seconds

300f4c0c0009991007ffffffffffffffff480120 | bat=76% T1=99.9°C T2=100.7°C T3=--.-°C T4=--.-°C T5=--.-°C T6=--.-°C
300f4c0c0009991007ffffffffffffffff480120 | bat=76% T1=99.9°C T2=100.7°C T3=--.-°C T4=--.-°C T5=--.-°C T6=--.-°C

I will try to include more info, whenever I will discovery something more. But for initial support for reading temperature it should be enough.

Features like setting top/low/target temperature or alarms, type of unit I will keep for later

[petrkr]

Continuing at https://github.com/petrkr/thermopro-tp902/ repository