Arduino Nano + HC-08 does not function properly

[PeteKnight]

You should read this…

Arduino Mega not connecting to BLE, 'SerialBLE' was not declared in this scope

There does appear to be a bug in the Sketch Builder code for the Mega & HM10 or HC08 - I’ll raise this as an issue on GitHub. The fix is simple, but before I explain this I’ll explain why you’ve wired the HM10 up wrongly… The Mega has four serial ports, referenced as Serial, Serial1, Serial2 and Serial3. The USB connector is attached to Serial via a TTL to USB chip. Pins 0 (Rx) & 1 (Tx) are also connected to Serial, but they bypass the TTL to USB chip. None of the other serial ports have thi…

Pete.