James, could you please put information on this error message on the FAQ? I spent several hours (spread out over days) trying different versions of the app on my phone, always getting this error – while I understand it’s just that my phone is too old, it would have been nice to know earlier that this error proves it X)

As an aside – how does the Bluetooth communication work? Is it a serial connection? And if so, would it be possible to communicate with the meter from a computer with an appropriate BT adapter? I don’t have a BLE USB adapter (yet), so can’t just fire up Putty and start testing baud rates…