It is my 2nd M5Stack Atom OMG and I have tried few MiTemp2 and MiTemp3 to connect to them. All are fine and connected my Home Assistant via MQTT without issue. (just remember to change them from BTHome2 → pvvx)
However My new SwitchBot Meter Pro (CO2) did not work as expected.
From MQTT Explorer, I could find the related record but
My setting - OMG v1.8.1 on M5Stack Atom Lite
Meter Pro (CO2) on USB Power
No SwitchBot Hub
Initial setup for Meter Pro had been paired to my iPhone and firmware is v1.0.5 now.
OpenMQTTGateway 1.8.1 only includes Theengs Decoder version 1.8.0, and the SwitchBot Meter Pro was only added to Theengs Decoder 1.8.2.
You can install the current development version on OpenMQTTGateway to get the latest decoders included - just install the same binary for your M5Stack Atom Lite