Serial.println('After readings begin, place known weight on scale') Serial.println('Remove all weight from scale') Serial.println('HX711 calibration sketch') The HX711 board can be powered from 2.7V to 5V so the Arduino 5V power should be fine.įloat calibration_factor = -7050 //-7050 worked for my 440lb max scale setup Most any pin on the Arduino Uno will be compatible with DOUT/CLK. This example code uses bogde's excellent library:''īogde's library is released under a GNU GENERAL PUBLIC LICENSE It all depends on the setup of your scale systemĪnd the direction the sensors deflect from zero state Your calibration factor may be very positive or very negative. TheĬalibration factor will be significantly different but it will be linearly related to lbs (1 lbs = 0.453592 kg). If you prefer kilograms, change the Serial.print(' lbs') line to kg. Use this calibration_factor on the example sketch Press +/- or a/z to adjust the calibration_factor until the output readings match the known weight

Once readings are displayed place the weight on the scale Setup your scale and start the sketch WITHOUT a weight on the scale Outputs the zero_factor useful for projects that have a permanent mass on the scale in between power cycles. Use it to determine the calibration_factor that the main example uses.

License: This code is public domain but you buy me a beer if you use this and we meet someday (Beerware license). Sparkfun 有很棒的 Arduino 程序来运行，最新版本可点击链接在 GitHub 上找到Įxample using the SparkFun HX711 breakout board with a scale

Adafruit trinket 5v power draw