Cannot reconnect to BMS without restarting app and BMS

[Jeak]

BMS only connects once, can't disconnect and reconnect unless BMS is power cycled and app is closed & restarted.

[thekroko]

Hmmm, this is difficult to debug without debugging the protocol flow. If you have the Android SDK, you could try building your own version, and enabling debugging here: https://github.com/thekroko/em3evbms/blob/main/BmsMonitor/app/src/main/java/com/kroko/bmsmonitor/Em3evBms.kt#L13

It's a bit odd that you have to power-cycle the BMS. The app sends the same init/unlock sequence every time, and that seemed to work fine on my end (independently of the state of the BMS). Not sure what is different in between BMS versions

[dougbert-b]

I see the same issue using a Pixel 7 phone. The Google Play Store said it had no version of the app suitable for my phone, so I rebuilt the app in Android Studio. I found the problem: BluetoothDevice.getName() works the first time the app calls it, but later it returns null. I suspect this is due to the scan results (which provide the device name) getting discarded). My fix was to have BmsInfoActivity explicitly pass its device name to the Em3evBms constructor. Now the app works fine for me.

I also updated the SDK to version 33, but that forced me to add more Bluetooth permission flags, and I got a big spew of warnings about experimental or deprecated things :-( If I ever fix those, I will do a pull request.