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The issue

- Marmitek MS13 is not always sending motion alert
- Everspring Z-Wave Motion sensor dies after a week and needs a reboot (reseat batteries)

The idea

I`ve bought a couple of these motion sensors to use for motion detection using normal wires and a relay board but the relay board needs 0v on the input to switch the relais and the PIR sensor is switching the opposite (3.3v)

Plan B

Connect the PIR sensor to a PI and use the GPIO pin input to send http request to homeseer to switch events

But..

I also found this and maybe its another cheaper idea than bying normal wireless motion sensors

http://lowpowerlab.com/blog/2013/11/17/ ... on-sensor/
http://tuomasnylund.fi/drupal6/content/ ... ion-sensor

[qoute]
I`ve bought a couple of these motion sensors to use for motion detection using normal wires and a relay board but the relay board needs 0v on the input to switch the relais and the PIR sensor is switching the opposite (3.3v)[/quote]

Just put a cheap 7414 behind it. It has 6 inverters so you only need one of these for every 6 detectors.