BM2 to HomeAssistant. Getting % but not Voltages

As your service/char fff0/fff4 seems to have several different Notifies cycling through, I would try resetting your BM2 completely, then trying again with a total fresh BM2 without pairing/connecting to the phone and app first.

It works fine with the actual BM2 app. Does not seem to be misbehavior of the BM2.

I can disconnect and reconnect the BM2 if you think it will help, but I dont understand the logic here… I have already disconnected and reconnected it several times while trying to get it working (I swapped it back and forth between a vehicle that often leaves the house and one that stays home all day).

I’m having the same issue. Did you get this resolved?

I would verify the following points:

  • Set the BT: Connect interval to 2 minutes
  • Activate BT: Connect to devices
  • Have your ESP32 within 3 feet of the BM2 without obstacles
  • Verify that you have the latest OMG version

If it works, set “BT: Connect interval” to the desired frequency example every 30 minutes.

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Excellent. That fixed it. Thank you for your help.

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You may want to increase the “BT: Connect interval” to 30 minutes for example to avoid polling too frequently the BM2