To allow the controller to use SMS messaging, you select 'Use SMS messaging' in the Controller>SMS SMS Configuration box.
The charts below show the actual process--exactly how the controller initializes and works with a GSM modem. This information is provided for advanced users who may require it for a specific application, or for troubleshooting.
Initialization
After initialization, the M90 can send and receive SMS messages.
Sending Messages
Note that a cell phone will not be able to receive a message if its SIM card is full.
The chart below shows how the M90 receives SMS messages. It also shows what happens if the M90 receives an SMS message marked 'Acknowledge'.
