Study the DevKit documentation to see how the KEYPAD buttons are connected to the Module.
You will also need to study the [b]Product Technical Spec /b for the Module.
Look at the ‘DTMF Keyboard’ sample…
Study the DevKit documentation to see how the KEYPAD buttons are connected to the Module.
You will also need to study the [b]Product Technical Spec /b for the Module.
Look at the ‘DTMF Keyboard’ sample…