C167 reading/scanning input from GSM module from RS232

Hello,
I am a novice in C language and have been trying to find a method of reading/scanning input from GSM, then comparing it against a text (e.g OK or ERROR). Then if true set a break.

I have tried scanf with no avail. I have also tried reading string which works but am unsure how to compare with my text.Has anyone any advice with what function would be useful?

Any replies greatly appreciated.

Andy

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