I'm trying to implement SMS based application on Portenta cat.m1/nb iot gnss shield, but i fail to understand how to use portenta compatible GSM.h module for sending SMS messages. I just cannot find any functionality in the library. Or is it as it seems, impossible? Or is it possible only by sending AT commands to the board? When i try to use previous GSM.h library which is for avr architecture boards it just throws an error that it's incompatible.
So far i've been using MKR GSM 1400 board for messaging and everything works perfectly.