The DFRobot Gravity: I2C Digital Wattmeter is a sensor that can be used to measure the power consumption of small DC loads up to 26VDC/8A with high precision (error of 0.2%). It can also be used to monitor small DC power systems such as battery-powered devices, solar power systems, etc. The sensor uses the I2C communication protocol and comes with full documentation and sample code.
Specifications:
SKU: SEN0291
Input Voltage (VCC): 3.3V~5.5V
Voltage Range (IN+ or IN- relative to GND): 0 ~ 26 V
Voltage Resolution: 4 mV
Voltage Relative Error: <±0.2% (Typical)
Current Range: 0 ~ ±8A (Bidirectional current)
Current Resolution: 1mA
Current Relative Error: <±0.2% (Typical, manual calibration required)
Power Range: 0 ~ 206 W
Power Resolution: 20 mW (Hardware) / 4 mW (Software)
Quiescent Current: 0.7 mA
Interface: Gravity I2C (logic level: 0-3.3V)
I2C Address: Four options 0x40, 0x41, 0x44, 0x45
Dimension: 30.0mm22.0mm/1.180.87 in
Weight: 4g
Features:
High precision, high resolution, large range, low temperature drift
Bidirectional current high side measurement
Compatible with 3.3V/5V controller
Sophisticated and compact, easy to embed in the project
Applications:
Solar power management
Battery fuel gauge
Electronic module power evaluation
Package contents:
Gravity: I2C Digital Wattmeter x1
XH2.54-4P Black Header x1
Gravity-4P I2C/UART Sensor Wire x1