VINITTRONICA SMS

I need an android application that sends pre-set sms messages to activate and deactivate relays of a SIM800C GSM card. Basically, the application will have to update automatically when there are changes (interpret sms messages sent by the card) as well as send command orders. I am sending a poorly done sketch of how I want it to be its interface (I need the interface to be improved graphically).

operating example:

By clicking on the "open" button the application will send an order to turn off relay2, turn on relay1, and at the same time it will update as current STATUS "OPEN"

When you click the "close" button, the application will send an order to turn off relay1, turn on relay 2 and update the current status to "CLOSED"

The "UPDATE" button only serves to check the current status of both relays and update the current status to open or closed, depending on the current situation of the relays.

Clicking on configuration will be able to register 3 different numbers authorized to send commands and receive updates of the board.

The document provided by the card manufacturer with all instructions is attached.

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