Digital Load Cell Weight Sensor + HX711 Weighing Breakout Board AD Module Pressure Sensors for Arduino DIY Electronic Portable Kitchen Scale (1KG+HX711)

FYI: On the 1KG load cell, all 4 screws are M4 - 0.7.

This works really well. It is only as good as the scale you have on hand to calibrate it. I have a 1kg scale that is .01 grams of resolution. With that calibration information, I got the load cell to be about .1 g precise. The values would fluctuate about .1 g. However, it takes 100ms to make this reading! A moderate downside if you are using Arduino. MCUs can have feedback loops running into the 100s of Hz. It is possible to request the reading, and then do something else while you wait for the response, but still the result will be delayed from reality. I know it is possible to change it to 80Hz... but really? Small SMD soldering? I don't think so.

Tested with raspberry pi and multiple HX711 python libraries module. Produced unstable/ noisy readings and inconsistent response to load even after verified wiring, mechanical mounting improvements, voltage level shifting for DT line, multiple power configurations 3.3 volt and 5 volt, filtering and calibration attempts. DT output measured over 5 volts when powered from 5 volts which is unsafe for raspberry pi gpio without additional circuitry. Possible clone/insistent board design. Could not achieve reliable load measurements despite extensive troubleshooting