I've been working on m66 and got it connected to PC via usb to serial converter, and got it up and running.
command replies with
But none of the bluetooth commands are working.
In reference to
Quectel_GSM_BT_Application_Note_V1.1.pdf provided by Quectel.
but it replies with an error code
I looked into all reference documentation for this module, but cannot find any refernce to this error.