Compiling error with GSM code

I have a problem when veryfy example “boards_GSM”. “SerialAT.begin(115200)” was not declared in scope.
Please help me!


I moved your question into a new topic instead of that years old one.

Your issue is probably bad syntax (aka code typos)

This is NOT a code factory or code mechanics shop, but please post the full code you are using here (properly formatted after pasting, as per the instructions).

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The example is fine, problem is your code/board config. But with such a “flood” of information it is all we can say here…