#194 IKEA Saltviken Scale Hack: Create a 150kg Scale Connected to Google Firebase (ESP32, ESP8266)

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 (should also work on ESP8266)
• 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-Sensors Firebase Library: https://github.com/ioxhop/IOXhop_FirebaseESP32 How to wire 3 wire Load Cells: http://bit.ly/2HjtPXM

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 For longtime use, these cells seem to be not ideal. There is a better choice, however more expensive: http://bit.ly/2Jvpb9x

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