Which means that the text messages are sent to memory and only a notification is sent to the serial monitor.
I assume that you want the entire message sent to the serial monitor on receipt? If so, try sendingAT+CNMI=2,2,0,0,0
Which means that the text messages are sent to memory and only a notification is sent to the serial monitor.
I assume that you want the entire message sent to the serial monitor on receipt? If so, try sendingAT+CNMI=2,2,0,0,0