M5Stack Mini Scales Unit – HX711 5kg I2C Scale | U177

The M5Stack Mini Scales Unit combines a load cell, HX711 precision ADC, STM32 controller, tare button, and RGB status LED in a compact I2C weighing module. It supports loads up to 5 kg and communicates with a compatible host at address 0x26, making it useful for ingredient scales, package checks, material dispensing, inventory bins, and force-measurement experiments. Accurate results require calibration with known weights, a rigid and level mounting platform, centered loading, overload protection, and temperature-aware measurement procedures.

5kg Load-Cell Measurement with the M5Stack Mini Scales Unit

Read HX711 Weight Data over I2C

The HX711 digitizes the load-cell signal while the onboard STM32F030F4P6 manages measurement and host communication through I2C address 0x26.

Tare and Zero with the Onboard Button

The local button can be used to establish a zero or tare reference, allowing the host to subtract a container or fixture before calculating the net load.

Show Stable, Tare and Overload States with RGB

The SK6812 RGB LED can provide immediate feedback for startup, tare, stable reading, target range, overload, or communication errors.

M5Stack Mini Scales Unit Applications

• Ingredient and portion measurement prototypes
• Package weight checking
• Material dispensing and filling systems
• Smart shelves and inventory bins
• Force and load-cell education

How to Integrate the M5Stack Mini Scales Unit

1. Mount the unit securely using the M3 hardware and attach a rigid platform that does not contact the base or enclosure.
2. Connect the Grove cable to a compatible I2C port and confirm that address 0x26 is available.
3. Record the unloaded zero value, then calibrate with one or more known reference weights.
4. Apply loads near the center of the platform and wait for the reading to stabilize before accepting the result.
5. Store calibration data and define overload, drift, and sensor-disconnection handling in firmware.

M5Stack Mini Scales Unit Deployment Notes

• The stated 5 kg value is a maximum load reference, not a recommended continuous overload point.
• A weighing platform is not included and must be designed for centered, repeatable force transfer.
• Mechanical preload, off-center loading, creep, vibration, temperature, and mounting stress affect accuracy.
• Recalibrate after changing the platform, enclosure, mounting hardware, or operating environment.
• This development unit is not a certified trade scale or medical weighing instrument.

M5Stack Mini Scales Unit Development Resources

• M5Stack Mini Scales Unit Official Documentation
• UiFlow2 Development Environment
• Arduino IDE