Is it possible for the SIM5216A to do the following with the right AT command script?:
(Basically it will be used with an Uno R3 to act as a "remote switch")
When the "remote switch" receives a SMS text "ON", the digital output goes high, then sends an SMS text "Confirmed ON".
When the "remote switch" receives a SMS text "OFF", the digital output goes low, then sends an SMS text "Confirmed OFF".
I want ANY phone to operate device and not have to set up "authorized phone numbers"
Digital output will run a 12vdc 100ma micro pump (or similar).
Cellular signal strength should be able to be checked by sending SMS text "signal" and receive a response (or similar method).
Is it difficult to write this?