Today we will hack an IKEA SALTVIKEN bathroom scale and create a connected weight sensor for up to 150 kg. We will use Googles free No- SQL Firebase cloud service as a data storage. To do that, we have to tear this nice scale apart and have a look inside.
We will:
- Re-use the load cells of the IKEA scale to measure heavy loads up to 150 kg or another scale, maybe even old an defective one
- Replace the original PCB with an HX711 and an ESP32
- Learn from IKEA how to wire the four special load cells that they add the weight
- Transfer data to the new No-SQL database “Firebase” provided by Google
- Calibrate the scale

Links:
Sketch and connections: https://github.com/SensorsIot/Weight-...
Firebase Library: https://github.com/ioxhop/IOXhop_Fire...

Conventional Load cell: http://bit.ly/2GFqt04
HX711: http://bit.ly/2EtefWc http://s.click.aliexpress.com/e/ufeQB27
Load cell 50kg: http://s.click.aliexpress.com/e/u33zBIa
Load cells 5kg: http://bit.ly/2IAMfm3


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