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
Take a look at: http://www.hitex.co.uk/c51primer/c51primer.html Stefan