While I was on vacation I kept panicking, thinking that something or someone would cause harm to my home. I’ve got a server that is capable of sending text messages (SMS) to my mobile phone using my providers web interface…
So…
Why couldn’t I set up a security system using a few 1-wire sensors installed in a PIR “security� motion sensor light? The logic to run the PIR sensor is TTL… When motion is detected it causes a data line to go high. Couldn’t a 1-wire device read that high input as an alarm?
Here are some thoughts…
ACE hardware ACE hardware Par Lamp Motion Sensor; chosen becayse it is the cheapest PIR sensor I could find.
DS2720 using the Power-Switch Sense input; chosen because it was the cheapest “sensor.�
Set the 1-wire controller or TINI to poll the DS2720 at a set interval to check to see if there is motion.