SMS not working when replace delay with millis

[red_car]

@kdiafafa

My sensor refreshes value every second, whenever I try to incorporate the sendmessage my sensor reading is not as accurate as before, I suspect due to the delay().

Where in your code are you getting the sensor value?

You will need code to handle the reponses you get from the modem. These will be a mixture of command replies, plus unsolicited result codes (URC) messages. URCs happen for example when a call or SMS come in.