Issue with GSM Module - Unable to Send SMS

Hi all,

I’m facing an issue with my GSM module (SIM900) where I’m unable to send SMS. The module connects to the network, but when I try to send a message using AT commands, it returns an error “ERROR” or “+CMS ERROR: 500.” I’ve double-checked the wiring, and the SIM card is active with sufficient balance.

Has anyone encountered this issue? Any suggestions on what could be causing this or how to resolve it?

Thanks in advance!

Edited by Drift Boss Unblocked a day ago