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.
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.
Power VCC
Power GND
I2C clock signal
I2C data signal
I2C address DIP switch documented in DFRobot SEN0291 wiki pinout table
Voltage and current measurement terminal 3P
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VCC | 1 | power | Power VCC | 3.3V to 5.5V per DFRobot SEN0291 wiki pinout table |
| GND | 2 | ground | Power GND | 0V |
| SCL | 3 | i2c | I2C clock signal | |
| SDA | 4 | i2c | I2C data signal | |
| ADDR | 5 | configuration | I2C address DIP switch documented in DFRobot SEN0291 wiki pinout table | |
| 3P TERMINAL | 6 | power measurement | Voltage and current measurement terminal 3P | IN+ or IN- relative to GND: 0V to 26V per DFRobot SEN0291 wiki specs |
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.
INA-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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