Gravity INA219 I2C Digital Wattmeter

The Digital INA219 I2C Wattmeter from DFRobot is a high-resolution, high-precision measuring module capable of measuring the voltage, current, and power of various electrical appliances and modules within 26V 8A. The maximum relative error is no more than ±0.2% (simple manual calibration is required before use). The INA219 module can be used for power consumption or battery life assessment of solar systems, batteries, motors, controllers or electronic modules. The module can be configured with four different I2C addresses via a DIP switch, which allows you to operate four modules simultaneously on the I2C interface. The module accurately measures bidirectional currents, which is particularly useful for batteries that need to be charged and discharged. In motor applications, the current can be monitored in real time to see if the motor current is too high due to overload. In addition, with this module, you can measure the power consumption of various electronic modules or the entire project to assess the battery life.

Info: You can reverse the connection cable to male by attaching a Dupont cable M-M 10cm. This makes it easy to use on an Arduino UNO.

Features

• High precision, high resolution, wide range, low temperature drift
• Bidirectional current measurement
• Compatible with 3.3V/5V controller
• Mature and compact, easy to integrate into the project.

Documentation:

• DFRobot Wiki
• Schema
• INA219 Datasheet

Technical Details:

• Input voltage (VCC): 3.3V to 5.5V
• Voltage range (IN+ or IN- related to GND): 0 to 26 V
• Voltage resolution: 4mV
• Relative voltage error: <±0.2% 
• Current measurement range: 0 to ±8A (Bidirectional)
• Current resolution: 1mA
• Current relative error: <±0.2% (manual calibration required)
• Power range: 0 to 206 W
• Power resolution: 20mW (Hardware) / 4mW (Software)
• Quiescent current: 0.7mA
• Interface: I2C (Logic level: 0-3.3V)
• I2C Address: 0x40, 0x41, 0x44 or 0x45
• Dimensions: 30 x 22 x 12mm
• Weight: 14g

Delivery content:

• 1x Gravity INA219 I2C Digital Wattmeter
• 1x Gravity IIC/UART Sensor Cable
• 1x Pin header 1x4Pin