Dear all,

I am reaching out to share my recent challenges in sending an SMS using the communication module of CP1242-7. Unfortunately, I have been unable to achieve success thus far.

To provide some background, I have successfully received a diagnostic response from the card by sending the text "CPDIAG" using my mobile phone. However, despite referring to Siemens' documentation (found at https://support.industry.siemens.com/cs/de/en/view/58638283) and attempting to implement the provided code into my project, I have been unable to establish a connection.

I have made attempts to debug the program, and it seems that the connection status is consistently causing the program to halt. It appears to be unable to establish a connection.

Given that I am receiving the diagnostic message from the card, I believe that the settings are configured correctly.

I kindly request your assistance in troubleshooting the issue. Could you please help me identify any possible reasons why the system is unable to establish a connection with the card?

Additional Information:

Software: TIA Portal V13 SP2

Hardware Identifier: 271