Directly read SMS when it arrives via GSM modem in PC over Serial Communication

Question

I am using SIM9000A GSM Modem and have it connected it to my PC.

The issue is that whenever SMS is received by my SIM I receive below data in PC:

+CMTI: "SM",8

I want that all incoming SMS should be directly be read in PC and need not send any further command. Something like when SMS comes - GSM modem should actually send SMS content to serial port.

Below is the output received for CPMS enq.

AT+CPMS=?

+CPMS: ("SM"),("SM"),("SM")

Answer 1

You can use the AT+CNMI command to tell the GSM modem to direct incoming messages directly to the serial port. The full command, with parameters, is: AT+CNMI=2,2,0,0,0

AT+CNMI=2,1,0,0,0 sets the modem back to indication only mode and AT+CNMI=2,0,0,0,0 does not send any indication when a new message is received.