Gravity INA219 I2C Digital Wattmeter

The Digital INA219 I2C Wattmeter from DFRobot is a high-resolution, high-precision measurement module that can measure voltage, current, and power of various electrical devices and modules within 26V 8A. The maximum relative error is not more than ±0.2% (a simple manual calibration is required before use). The INA219 module can be used for evaluating power consumption or battery life of solar systems, batteries, motors, controllers, or electronic modules. The module can be configured with four different I2C addresses via a DIP switch, allowing you to operate four modules simultaneously at the I2C interface. The module measures precise bidirectional currents, which is especially useful with batteries that need to be charged and discharged. In motor applications, the current can be monitored in real-time to determine if the motor current is too high due to overload. Furthermore, with this module, you can measure the power consumption of various electronic modules or the entire project to assess battery life.

Info: You can reverse the connection cable by connecting a Dupont cable M-M 10cm to male. This way, you can also easily use it on an Arduino UNO.

Features

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

Documentation:

• DFRobot Wiki
• Schematic
• Datasheet INA219

Technical Details:

• Input Voltage (VCC): 3.3V to 5.5V
• Voltage Range (IN+ or IN- relative to GND): 0 to 26 V
• Voltage Resolution: 4mV
• Relative Voltage Error: <±0.2% 
• Current Measuring 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
• Dimension: 30 x 22 x 12mm
• Weight: 14g

Package Includes:

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