M5Stack Scales Unit with 20kgs Range (HX711)

M5Stack HX711 20kg Scales Unit for Embedded Weighing

M5Stack HX711 Scales Unit combines a 20 kg weighing sensor, an STM32F030F4P6 microcontroller, and the HX711 24-bit analog-to-digital converter in one compact assembly. It communicates with a host through I2C, includes a tare button, and provides a programmable RGB status indicator. The integrated format reduces the work of matching a separate load cell, acquisition board, and basic local controls during early development.

Build a 20kg Weighing Node Through I2C

M5Stack HX711 Unit is intended for applications that need weight or force-related data within the 20 kg range. Check bus addressing before adding other peripherals to the same system.

Use a 24-Bit ADC for Load-Cell Acquisition

M5Stack HX711 design uses the dedicated HX711 weighing acquisition IC with 24-bit conversion. The unit supports gain settings of 32, 64, and 128 and a 10 SPS data rate.

Tare the Scale at the Point of Use

M5Stack HX711 Unit includes a physical tare button, allowing the installed system to zero the reading around containers, fixtures, or other supported mechanical setups. A tare function removes the current offset; it does not replace proper calibration, rigid mounting, stable load transfer, or validation against known reference weights when measurement accuracy matters.

Use RGB Status Feedback

M5Stack HX711 includes a programmable SK6812 RGB indicator. Status light behavior can be mapped to conditions such as ready, tare in progress, threshold reached, overload warning, communication fault, or application-defined states. Keep color meanings consistent across systems so operators do not have to reinterpret indicators between devices.

Mechanical Installation Matters as Much as Software

M5Stack HX711 weighing results depend on how force reaches the sensor. Off-axis loading, unstable fixtures, vibration, cable strain, uneven surfaces, temperature changes, or mechanical contact with surrounding parts can affect readings. Design the platform so the intended load path is repeatable, and test the assembled mechanism rather than evaluating only the electronics on a desk.

Smart Scales and Portion Measurement

M5Stack HX711 can support compact smart scales, kitchen-scale prototypes, dispensing experiments, fill-level estimation by weight, and other systems where a controller must react to measured load. The 20 kg range is the rated measurement range, not permission to apply uncontrolled shock loads or overload the mechanical structure.

Piece Counting and Inventory Fixtures

M5Stack HX711 data can be used in piece-counting workflows when individual items have sufficiently consistent mass. A counting system should establish a representative unit weight, account for container tare, and define acceptable tolerance. Mixed parts, vibration, or large variation between pieces can reduce counting reliability.

Presence and Load-State Detection

M5Stack HX711 can also support applications that need to distinguish empty, occupied, loaded, or threshold states rather than display laboratory-grade weight values. Examples include seat or platform presence experiments, container status, fixture loading, and process-step confirmation. Set thresholds with margin based on real noise and mechanical variation.

Integration and Calibration Workflow

Begin with secure mechanical mounting, then verify I2C communication at address 0x26. M5Stack HX711 setup should establish a zero point, apply known reference loads across the expected working range, and check repeatability after removing and reapplying the load. Record calibration assumptions when the device is copied into another fixture or mechanical design.

M5Stack HX711 development is supported through Arduino and UiFlow-oriented workflows. Build the application progressively: first read stable values, then add tare handling, scaling, filtering, thresholds, display logic, logging, or network reporting. This sequence makes it easier to separate communication issues from mechanical or calibration problems.

Development Resources

Technical documentation provides pinout, electrical details, and software references. Calibration values and mounting assumptions from other scale assemblies should not be copied directly to this U108 20 kg integrated unit; validate the installed mechanics with known reference weights.

• Technical Documentation
• UiFlow1
• Arduino IDE

M5Stack HX711 systems are easier to maintain when mounting geometry, tare procedure, reference weights, calibration values, gain setting, thresholds, firmware version, and expected load range are documented before deployment.