The HX711 is a small analog to digital converter (ADC) designed specifically for load cells and strain gauges. It provides high resolution and accuracy with dual-channel analog to digital conversion. The HX711 has two selectable data rates and uses a two wire interface (Clock and Data) for communication. Any microcontroller’s GPIO pins should work and numerous libraries have been written making it easy to read data from this popular module.

Most common load cells use a four wire wheatstone bridge to connect to the HX711. These are commonly colored as follows:
•Red (E+ or VCC)
•Black (E- or GND)
•White (A+, Signal+, or Output+)
•Green (A-, S-, or O-)