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 · Control - 3P TERMINAL6
Voltage and current measurement terminal 3P
Type · PowerVoltage · IN+ or IN- relative to GND: 0V to 26V per DFRobot SEN0291 wiki specs
| 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 | Control | I2C address DIP switch documented in DFRobot SEN0291 wiki pinout table | |
| 3P TERMINAL | 6 | Power | Voltage and current measurement terminal 3P | IN+ or IN- relative to GND: 0V to 26V per DFRobot SEN0291 wiki specs |
Pin details
6 connections- VCC1
Power VCC
PowerVoltage · 3.3V to 5.5V per DFRobot SEN0291 wiki pinout table - GND2
Power GND
GroundVoltage · 0V - SCL3
I2C clock signal
I2C - SDA4
I2C data signal
I2C - ADDR5
I2C address DIP switch documented in DFRobot SEN0291 wiki pinout table
Control - 3P TERMINAL6
Voltage and current measurement terminal 3P
PowerVoltage · IN+ or IN- relative to GND: 0V to 26V per DFRobot SEN0291 wiki specs
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.
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