How can I call an “AT command” in Codesys for a GSM modem? Not standard send_sms, etc
First, to increase your understanding of AT commands in general, read the V.250 specification. That will go a long way in making you an AT command expert. Then for the actual implementation, I do not know Codesys, so the following is pseudo code of the structure you should have for handling AT commands: the_modem = … Read more