When HN users recommended it
1 HN user recommended this in 2015, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2015, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
I used:
- magnetic contact sensor: http://www.amazon.com/Magnetic-Sensor-Window-Warning-Switch/...
- raspberry pi: http://www.raspberrypi.org/
Wired up all contact sensor and connect to gpio on pi. Use pi to detect circuit break and send messages or phone calls via google voice.