system

Retransmitting Alarm System State Changes with Raspberry Pi and Arduino

I spotted a post by Lior Hass on Hackaday a little while back where he described his Alarmino project where his alarm system now connects with an Arduino and a custom board to simulate the phone line and interpret Contact-ID protocol.  He could then get the system to SMS him in the case of an alarm.  In …

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Cheap and Easy Guide to Building a Private Telephone System

Due to the proliferation of cellular networks, most homes have abandoned their land line telephone plan. The infrastructure is still there though, hidden in our walls. Why let all that copper go to waste? Let’s talk about how inexpensive and easy it is to reclaim this technology, making it useful again in today’s internet connected …

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