ATC_MiThermometer VS sensor.goveetemp_bt_hci

I want to do a little IOT project where I establish a MQQT-Broker on my Raspberry Pi and send it readings from my measurement devices (xiaomi Mijia-LYWSD03MMC). The plan is for these devices to connect to my ESP32, allowing me to transfer data to the broker on the Pi. I've successfully connected my ESP32 to my Wi-Fi and to my broker, but I'm experiencing significant difficulties in connecting it to my two measurement devices. I have essentially followed the instructions provided in this GitHub repository (https://github.com/atc1441/ATC_MiThermometer) as best as I could. I also checked some other repos but they didn't really help me as they were too big/complex...

If you get off WiFi and on Bluetooth: https://github.com/atc1441/ATC_MiThermometer They last a year with a single CR2032 which is hard to do with WiFi.

I then copied this Python script to the Raspberry Pi 4 and was able to read the temperature and humidity! (https://github.com/atc1441/ATC_MiThermometer/tree/master/contrib/python)

I’m using 16pcs Xiaomi Thermometer LYWSD03MMC BLE thermometer around the house with custom ROM from here https://github.com/atc1441/ATC_MiThermometer

I use the Xiaomi (pronounced Show Me) Mi Temperature and Humidity monitors (version 2) and flash the firmware with a 'open source' version (here or the older one here). I've found battery life good (8 months + with the newer software on one sensor) and bar from one corrupt display (right next to an outdoor electricity feed - well the box is handy and dry) then they have just run and run and run.

The thermometers in screenshot are Xiaomi Thermometer LYWSD03MMC with ATC custom firmware. Their bluetooth broadcast data collected by some cheap chinese ESP32 board and ESPHome addon in Home Assistant.

You can replace their firmware with one which is more open and broadcasts the values without needing to connect to the device: https://github.com/atc1441/ATC_MiThermometer

For those who are interested, the Passive BLE monitor Home Assistant integration supports quite a few thermometers. The Govee support is based on a component I wrote, Home-Is-Where-You-Hang-Your-Hack/sensor.goveetemp_bt_hci/. If you are looking for just the decoder, check out Thrilleratplay/GoveeWatcher.

If you run Home Assistant, (or want to), the driver to pick these signals up, and get the values into Home Assistant, you will add this package: https://github.com/Home-Is-Where-You-Hang-Your-Hack/sensor.goveetemp_bt_hci

I'm running ubuntu 20 on a Raspberry Pi 4. I'm running Home Assistant in a docker container, instead of running their HassOS. I followed the instructions on github for installing HACS and the goveetemp sensor. I couldn't see the sensor showing up in Home Assistant. I chased a lot of stuff, including this bug report that makes it sound like bluetooth isn't all that reliable on the Raspberry Pi. I also found this thread in this subreddit, but that wasn't my problem.

I'm reading the bluetooth sensor with a raspberry also used for the webcam, found this library, reimplemented the parser in nodejs, this is the relevant part:

I'm going to make some tests with this library that I found that seems to support this device, I'll let you know if it works well !

Govee Temperature/Humidity BLE Home Assistant Component