Dear Sir,
Thanks for your inquiry in Quectel forum.
If you choose the external MCU, why you still choose M66 to work on OpenCPU mode ?
If M66 already work on OpenCPU module, which program you are running now ? If you want to communicate with module via UART, there have the example code in SDK package, you can check it. Thanks!
dont block thread where is opened uart… dont do this:
while(1) { … }
while( waithing_flag ) { … }
if thread is not in rtos blocked state, the uart callback will never happen
in practice, the callbackS( uart, timer … etc ) is HIDDEN system message … processed from Ql_OS_GetMessage ( hidden for user )