Support ATC_MiThermometer flashed Xiaomi LYWSD03MMC sensors

[marrold]

Thanks to @atc1441 it's possible to flash the LYWSD03MMC sensors to remove the encryption - https://github.com/atc1441/ATC_MiThermometer

However once flashed, Room Assistant doesn't seem to be able to parse them:

7/18/2021, 6:07:29 PM - warn - XiaomiMiService: XIAMOI_LYWSD03MMC_03 does not appear to be a Xiaomi device. Got advertisement {"localName":"ATC_6DBDE7","serviceData":[{"uuid":"181a","data":{"type":"Buffer","data":[164,193,56,109,189,231,1,61,49,100,12,157,36]}}],"serviceUuids":[],"solicitationServiceUuids":[],"serviceSolicitationUuids":[]} 7/18/2021, 6:07:32 PM - warn - XiaomiMiService: XIAOMI_LYWSD03MMC_02 does not appear to be a Xiaomi device. Got advertisement {"localName":"ATC_AEE5EA","serviceData":[{"uuid":"181a","data":{"type":"Buffer","data":[164,193,56,174,229,234,1,59,48,100,12,171,44]}}],"serviceUuids":[],"solicitationServiceUuids":[],"serviceSolicitationUuids":[]}

Would it be possible to add support?

Thanks!

[mplacona]

Wondering if there have been any updates on this. I have some of these working well but all my new devices which report the same as the above don't ever make it to the entities page and therefore never get queued to my MQTT server.

I don't know how to "dump" the messages that come from the ones that currently work, but can do it if anyone tells me how in case it's helpful. This is exactly what I get from devices that aren't working at the moment:

Nov 18 17:28:42 pigateway room-assistant[18064]: 18/11/2021, 17:28:42 - warn - XiaomiMiService: Deathstar does not appear to be a Xiaomi device. Got advertisement {"localName":"ATC_DEATHS","serviceData":[{"uuid":"181a","data":{"type":"Buffer","data":[164,193,56,190,3,99,0,230,50,66,10,239,95]}}],"serviceUuids":[],"solicitationServiceUuids":[],"serviceSolicitationUuids":[]}

Thanks

[mplacona]

I may have solved this one by myself. I thought it had to do with how advertising works. Turns out the custom firmware defaults to the "custom" ode as described here. So I went ahead and changed it to "Mi" and now it works.