Thingiverse

Smart Bed occupancy sensor

by Luc3as

92 Downloads

64 Likes

0 Makes

Very simple holder for HX711 load cells, to be installed under bed mattress. it is holding by two screws with washers.

Main motivation was to be able to run automations like turn off all lights and open blinds in the morning. Overall it came out surprisingly exact, as whole mattress became giant scale. The build should be under 10 €. HX711 with 4 load cells, Wemos D1 mini, and 3D printed mounts. Flashed with ESPHome.

Device itself is connected by scheme attached, and wired to Wemos D1 mini through I2C

## Shopping list
[HX711 Load cells](https://www.aliexpress.com/item/4000205992686.html?spm=a2g0s.9042311.0.0.51ec4c4dvAl9yP)
[Wemos D1 Mini](https://www.aliexpress.com/item/32688079351.html?spm=a2g0s.9042311.0.0.27424c4d0Hicaz)
Telephone 4 wire cable
Telephone 4 pin connectors I had laying around.

Bellow is firmware for ESPhome to use it with HomeAssistant.
After installing you have to look for logs, mark the number sensing with no weight, and then put some known weight

bedscale bed occupancy ESP8266 esphome Homeassistant homeautomation hx711 presence detection smart scale smarthome smartscale WeMos D1 Mini bedscale bed occupancy ESP8266 esphome Homeassistant homeautomation hx711 presence detection smart scale smarthome smartscale WeMos D1 Mini

Source

Thingiverse

What you need to print this: Intermediate Low confidence

Single piece Hardware needed

Supports 1/3

Assembly 0/3

Settings 1/3

Bed size 0/3

Post-process 1/3

Printer

FDM / FFF

File format