LYWSD03MMC not recognized, faulty device?

Hi,

I bought two LYWSD03MMC sensors, flashed custom firmware through Telink Flasher and one is working great, i get temp/humidity/battery readings as expected but i have a problem with other one.

This is my config:

ble_monitor:
  batt_entities: True
  restore_state: True
  report_unknown: True
  devices:
  - mac: 'A4:C1:38:00:AE:2A'
    name: 'Hallway'
    temperature_unit: C
  - mac: 'A4:C1:38:E1:8C:8D'
    name: 'Livingroom'
    temperature_unit: C

Device with MAC A4:C1:38:00:AE:2A is working good, but A4:C1:38:E1:8C:8D is not getting any values in Hass. I turned on report_unknown, but still there aren’t any messages about the ‘unknown’ device.

I downloaded app BLE Scanner on my phone and i see messages from both devices - This is raw data for mac A4:C1:38:00:AE:2A which is working fine: 151695FE50305B05242AAE0038C1A40A10012A0000000B094154435F303041453241

and this is raw data for faulty mac A4:C1:38:E1:8C:8D: 10161A18A4C138E18C8D00FB21640C310B0B094154435F453138433844

Message from faulty device is shorter, i looked through the code a bit and i see there should be bytes \x16\x95\xFE present in message but i dont see those in message from a faulty device.

I tried reflashing the custom firmware on the faulty device, shorting reset pins above the battery but nothing seems to help. Also i made sure that Advertising Type ‘Mi Like’ is set, that button was pressed about thousand times now while the device is connected to my phone 😃

So, do I have a faulty device on my hand or is there some kind of remedy for this? Thank you in advance

[ivanpavlina]

Problem solved, i flashed both sensors with new firmware which has MiLike Advertising type and they both work. Yay \o/ I’m attaching this firmware here so that it helps any poor soul like me.

Thank you for the help dude, you rock, now i finally have some proper and cheap option to measure temperatures in all corners of my house 😄 ATC_Thermometer-05122020-mi_like-adv.zip

[ivanpavlina]

😦 404 on all links. I’m gonna build my own compile env… with blackjack and hookers 😃