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Can you elaborate how there is no need for hardware changes? Are you connecting through the earpiece somehow?

Some time ago I hacked our flat intercom. I needed to have a text message delivered when the intercom rang (we use it to open door to the building), I had to tap to it with an arduino.

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Cool. Always great to hear what people tried to do with these intercoms. I played with Arduino myself a lot for similar reasons. Thanks for sharing.

It’s simple actually. We program all the units to call our cloud phone numbers. These numbers are shared among all US customers, so service is cheap to run. Also we got a patent in how we process these calls.

We then process, record, forward, these calls to their destinations. And also we send text message updates for certain events.

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