I'm trying to replicate this https://www.cytron.io/tutorial/send-receive-sms-using-sim7600-gsm-module-arduino Cytron project, but I'm getting some strange characters back from the SIM7600NA-H board I'm using.
I changed the (GSM_BAUD) baud rate from 9600 to 115200 to operate with my board, other than that no other code changes.
I get no response from the 'LED13 ON' or ''ENABLE BUTTON' SMS commands.
Any advice appreciated.