I'm using different libraries to perform different functions, like sendsms and shutdown. However, there's a whole host of different types of commands that my sim900 can do - outside of these libraries.
I also assume the functions written in these libraries utilize some of these at commands, but that might be an incorrect assumption...
My Question: Can I hardcode AT commands in the sketch (without inputing into serial) for commands I can't get from libraries?
For example, there are several types of sleep modes, one which is a low power sleep mode. I want to get into this state by hardcoding the AT command after I send an SMS.
Thanks for your help 