Gravity: I2C Digital Wattmeter
I2C wattmeter measuring voltage (up to 26 V), current (up to 8 A), and power with ±0.2% accuracy after calibration. Suited for monitoring solar panels, batteries, and DC power supplies.
Pinout
- VCC1
Power VCC
Type · powerVoltage · 3.3V to 5.5V per DFRobot SEN0291 wiki pinout table - GND2
Power GND
Type · groundVoltage · 0V - SCL3
I2C clock signal
Type · i2c - SDA4
I2C data signal
Type · i2c - ADDR5
I2C address DIP switch documented in DFRobot SEN0291 wiki pinout table
Type · configuration
Start wiring
I2C · Analog · 3.3 – 5 V · Breakout
Confirm the data interface matches your host board.
Module pins: VCC, GND, SCL, SDA. Schematik maps them to your board in the app.
Power monitors
23 other optionsINA-series I2C monitors, Hall-effect sensors like the ACS723 and Gravity 20A/50A boards, and non-invasive CT clamps for everything from 3.3V rail telemetry to mains current sensing.
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