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Unconditional Satisfaction GuaranteeNo Shipping Fees Above 302 Months to Decide. Returns Simplified.The M5Stack Scales Unit is an integrated 20kg weighing sensor unit for adding weight measurement to M5Stack projects through an I2C interface. It combines an STM32F030 controller, an HX711 24-bit weighing ADC, a 20kg load sensor structure, a tare button, and a programmable RGB status LED in one compact module.
This I2C 20kg weighing sensor lets a host controller read weight data directly over Grove I2C at address 0x26. With 10SPS output and selectable gain amplification, the HX711 scale sensor unit is well suited for smart scales, small inspection fixtures, item counting devices, and object movement detection.
| MCU | STM32F030F4P6 |
| ADC | HX711 |
| Measurement Range | Up to 20kg |
| Output Data Rate | 10SPS |
| Gain Amplification | 32, 64, 128 |
| Communication Interface | I2C @0x26 |
| LED | SK6812 on PA7 |
| Button | PA2 tare button |
| Housing Material | Plastic |
| Product Size | 56.0 x 40.0 x 41.0mm |
| Product Weight | 83.5g |
| Package Size | 57.0 x 42.0 x 41.0mm |
| Gross Weight | 92.3g |
| 1 | Unit Scales |
| 1 | HY2.0-4P Grove cable (20cm) |
The tare button can be used to zero the reading before measurement. For best results, mount the M5Stack Scales Unit on a stable surface, avoid side loads on the weighing structure, and calibrate the system with a known weight before using it in a finished device.
| Weight (g) | Absolute Error (g) | Relative Error |
| 50 | 0.45 | 0.9% |
| 100 | 0.25 | 0.3% |
| 250 | 0.20 | 0.1% |
| 500 | 0.25 | 0.1% |
| 1000 | 4.15 | 0.4% |
| Grove Pin | Signal |
| Black | GND |
| Red | 5V |
| Yellow | SDA |
| White | SCL |
It is designed for weighing applications up to 20kg.
The M5Stack Scales Unit communicates through Grove I2C at address 0x26.
The tare button zeros the current load so the system can measure the net weight of the item being placed on the scale.
