# AT commands for GSM

I'am trying to interface a GSM module with flowcode for PIC and the Tutorial I'am following suggests a module SmartGM862 which is not available in my market but instead some other SIM900 series module development board are available.

My question is can I interface sim900 series module with flowcode and work with the same built-in AT command macros ?.

Do all GSM modules in general have same set of AT commands? , so in that case any module should work with flowcode compatible AT commands.

Usually in the AT user manuals the AT commands are separated by these main and sub-groups. As I saw in the SIM900 AT User Manual, the flow control related commands were under the V.25.ter standard. At the SartGM862's manul it can be found at the basic Hayes commands. (check for command: AT+IFC)