I am making an Arduino program with SIM800L module and would like to check credit status of the SIM card. When I manually enter the command: AT+CUSD=1,"*123#" into Serial Monitor, it works fine.
But in the Arduino (1.8.7) I am receiving an error
stray "#" in program
when compiling this line of sketch:
I am not experienced enough to fix this problem. Could somebody help me, please?
Thank you. Marko