Identificador de chamadas telefonicas com arduino

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boa noite!
estou no ultimo ano de faculdade e queria desenvolver uma aplicação que, ao receber uma ligação poder reconhecer esse numero telefônico através de um microcontrolador e, com base nesse numero, poder utiliza-lo no meu software. alguém poderia me dar dicas por onde começar?

referes-te uma linha telefónica normal?


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