This week I finally received all the necessary pieces to build a internet connected kitchen scale. The ingredients are: a load cell (Wikipedia), a high resolution ADC (HX711) and of course a ESP8266 based NodeMCU V1.0 module. For the moment I’m not logging the data coming from the scale to the internet but I rather display it on one of my beloved SSD1306 I2C 128×64 pixel OLED display.
This load cell is specified for a range of 1kg so that’s where it is most accurate. And comparing the data to my commercial scale shows rather good accuracy!
This load cell is specified for a range of 1kg so that’s where it is most accurate. And comparing the data to my commercial scale shows rather good accuracy!
Wiring
| Load Cell | HX711 | |
| Red | E+ | |
| Black | E- | |
| Green | A- | |
| White | A+ |
Resources
- Load Cell: Aliexpress, Amazon
- 24bit ADC HX711: Banggood
- NodeMCU V1.0: Banggood
- OLED display SSD1306 I2C 128×64: Banggood
- HX711 Arduino library: https://github.com/bogde/HX711
- Demo Code: https://github.com/squix78/esp8266-projects/tree/master/arduino-ide/wifi-scale
Now a beer! Did you like this post? It often takes me several hours of my free time to write one. If I was your neighbour would you offer me a beer for the hard work I did for you? The beauty is: beers can be teletransported with a painless donation using Paypal. A beer in a Swiss bar costs about USD $4.80. Or use this affiliate link if you order something on Banggood and I'll get a small kickback. Thank you!
HI,
i would like to more know how about this project. I want to replicate the same at my home.Could you please guide me with the same ? i am very naive at these things,but am interested.