Have you ever been spending a lot time sitting in your backside organising new integrations for Dwelling Assistant and writing firmware for ESP8266 nodes? Perhaps it’s time that you just built yourself a chair occupancy sensor to quantify the precise time you might be at your desk. Or possibly you simply need the lights to remain on each time somebody is sitting at a desk. Want to avoid wasting power? Have your Laptop put into sleep-mode at any time when the chair has been empty for more than 30 minutes? A chair occupancy sensor might sound like a gimmick at first but there are some really helpful use-instances when you begin to think about it. That is strictly what Dwelling Assistant neighborhood member parrel determined to do. And in true Dwelling Assistant vogue, it is a DIY sensor hacked collectively from an Aqara window/door sensor and a automobile seat pressure sensor. As a result of this venture makes use of a Zigbee sensor it's freed from any wires and may be powered for a lot of months utilizing solely a single coin-cell battery. And since you possibly can order all the parts straight from China, the whole mission will cost you only about $10. Spend money on an honest soldering station for initiatives like this one. The electronic a part of Aqara window/door sensor used in this challenge uses a so-called reed change. The second and smaller part of the sensor is just a magnet. When the magnet is close to the reed change, the contacts in the reed swap are closed, the circuit is accomplished, and the sensor tells you that the window or door it is connected to is closed. If you open the window or https://www.empowher.com/users/epoxypump35 door, the magnet can’t shut the contacts and the circuit is damaged. It's such a simple bit of electronics that even I understand it. Within the chair occupancy sensor, the magnet is no longer used and might be stored for different initiatives or used on your fridge. The reed change is bypassed by attaching the wires coming from the automobile seat pressure sensor to both end. If you happen to needed, you would also utterly remove the reed change. Instead of having a magnet close the circuit this chair occupancy sensor now uses the automotive seat pressure sensor to close it. All that is left to do is to insert the sensor into your chair and the undertaking is complete. As you might have guessed, you're required to solder the wires from the car seat pressure sensor to the Aqara window/door sensor. Other than that, this challenge is very straight ahead and uncomplicated.