Gravity: I2C 1Kg Weight Sensor Kit - HX711

The Gravity I2C 1 kg Weight Sensor Kit is a complete scale-building kit that includes a load cell, HX711 signal adapter board, acrylic mounting bracket, and all hardware needed to measure weight from 1 g to 1,000 g. The on-board MCU processes HX711 data and communicates via I²C, making it compatible with Arduino, micro:bit, ESP32, and Raspberry Pi.

Unlike basic HX711 breakouts, this kit features a built-in calibration algorithm with one-button calibration — no separate calibration sketch needed. Simply press the button or use the API to calibrate, then start reading weight values over I²C.

Key Features

• 1 g to 1,000 g Range – Suitable for small-scale weighing applications
• HX711 ADC with On-board MCU – Processed data output via I²C for easy integration
• One-Button Calibration – Built-in calibration algorithm, no separate code needed
• API Calibration – Alternatively calibrate programmatically via software
• Gravity I²C Interface – Standard DFRobot Gravity connector with 3.3V/5V compatibility
• Configurable I²C Address – 0x64, 0x65, 0x66, or 0x67
• Complete Kit – All mounting hardware and acrylic bracket included

Specifications

• Measuring Range: 1 g – 1,000 g
• Working Voltage: 3.3V / 5V
• Working Current: <20 mA
• AD Conversion Chip: HX711
• Communication: I²C
• Signal Board Size: 31 × 37 mm
• Assembled Dimensions: 120 × 100 × 30 mm

Compatibility

• Arduino (Uno, Mega, Leonardo, etc.)
• micro:bit
• ESP32
• Raspberry Pi

Ideal For

• DIY electronic scales
• Inventory and supply-level monitoring
• IoT weighing platforms
• STEM education projects

Package Contents

• 1× Weight sensor (load cell)
• 1× Signal transfer board (HX711 + MCU)
• 1× Acrylic bracket
• 2× M4×20 screws
• 2× M5×20 screws
• 2× M3×8 screws and nuts
• 4× Trapezoidal feet
• 1× Gravity 4-pin I²C cable

Resources

• Product Wiki (Documentation, Code Examples, Assembly Guide)