hi, i have been trying to send sms when there is sensor output.
- sending the mobile no where sms needs to be sent via serial monitor of arduino uno.
- the number entered in serial monitor is saved in eeprom and eeprom data is feteched by gsm
i am getting error at : AT+CMGS = error - operation not allowed. please help me…
if i hardcode the mobile no (without using serial monitor) or use eeprom data , gsm is sending sms.