#Seat sensor with Zigbee door/window sensor, no reed switch

1 messages · Page 1 of 1 (latest)

forest pond
#

Hi all, i'm making a presence seat sensor for my desk chair using a car seat sensor and a door/window Zigbee sensor, as you can see in https://community.home-assistant.io/t/diy-zigbee-bed-chair-occupancy-sensor/239517 But my Zigbee sensor has no reed switch, so I don't really now where to solder the seat sensor wires. I can`t identify the magnetic sensor in the PCB. Any idea? BTW, I've ordered a leakage Zigbee sensor, with the 2 contacts exposed, but I would want to use this sensors in other similar projects. Thanks in advance 🙂

2025-02-04_23_05_32l.jpg
Home Assistant Community
🪑 DIY Zigbee bed/chair occupancy sensor

I want to share with you how I created a chair occupancy sensor for $10. I have a motion sensor in my room, that toggles the lights. However, the lights often turned off because I’m not moving that much in the chair. So I had to find a solution for that. What you need: Aqara Door/window sensor (https://aliexpress.com/item/32991903307.html) Ci...

finite patio
#

if there's no obvious reed switch, then the sensor is probably using a hall effect sensor instead. There will be an IC with at least 3 or 4 pins somewhere on the board which contains the hall effect sensor, possibly along with amplifier/readout circuitry.

#

honestly there's a good chance that it's in the IC that the yellow arrow in your picture is pointing at.

#

but in order to know whether and how you could hook up to that circuit, you need to identify what type of chip and what pinout is being used.

#

(it also might be on the other side of the board from your picture)

forest pond