Gravity I2C 1Kg Scale Kit HX711

This DFRobot kit builds a scale up to 1 kg. It contains a bending beam load cell, a Gravity module with HX711 and its own microcontroller, acrylic plates, feet and screws. The module converts the readings itself and outputs the weight via I2C. Calibration is done with the CAL button or by a command from the program, no separate calibration code is needed; the RST button sets the tare. The module works with 3.3 V and 5 V, for example on Arduino, micro:bit, ESP32 or Raspberry Pi.

Note: If the Gravity cable has Dupont sockets on one end, it can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Gravity IO Expansion Shield for Arduino V7.1
• Dupont Cables M-M 10cm 20 Pieces

Features:

• Complete kit for a scale up to 1 kg
• HX711 with microcontroller on the module, weight output via I2C
• Calibration with the CAL button or by command, tare with the RST button
• Four I2C addresses 0x64 to 0x67 via the A0 and A1 switches, effective after restart
• Gravity I2C connector, 3.3 V and 5 V
• Load cell: red to E+, black to E-, white to S-, green to S+. If the reading drops under load, swap S+ and S-

Application Examples:

• Simple electronic kitchen or letter scale
• Monitoring the fill level of supplies and reporting when running low
• Weighing platform for IoT projects

Documentation:

• DFRobot Wiki KIT0176
• Example code calibration by button (DFRobot Wiki)
• Reference: library, commands and assembly (DFRobot Wiki)
• Schematic (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: KIT0176
• Measuring range: 1 to 1000 g
• Deviation: below ±0.2 %
• AD converter: HX711
• Interface: I2C, address 0x64 (default), 0x65, 0x66, 0x67
• Operating voltage: 3.3 V or 5 V
• Current consumption: below 20 mA
• Module connections: VCC, GND, SCL, SDA; E+, E-, S-, S+
• Module: 31 × 37 mm
• Assembled scale: 120 × 100 × 30 mm
• Weight: 166 g

Scope of Delivery:

• 1× load cell 1 kg
• 1× Gravity HX711 I2C module
• 1× acrylic bracket
• 2× screws M4 × 20
• 2× screws M5 × 20
• 2× screws M3 × 8 with nuts
• 4× feet
• 1× Gravity I2C cable 4-pin