AT Commands for communicating with a Modem / Phone / Telecommunication device

When you want to communicate with a SIM Card over AT Commands this blog article is the right choice. Here you will find important AT commands you can send to your SIM. The commands are always in bold below:

Check if everything is ok and if the connection is available:

AT

Remove an SMS at index 1:

AT+CMGD=1

List SMS messages:

+CMGL

Signal Quality:

AT+CSQ

Enable Error mode:

AT+CMEE=1

Read storage options:

AT+CPMS=?

Read SMS from storage:

AT+CPMS=”SM”

Read all SMS messages:

AT+CMGL=”ALL”