CJMCU-219 INA219 I2C Bi-directional Current / Power Monitoring

 Sensor Module

The CJMCU-219 INA219 is a precision high-side current and power monitoring sensor module featuring bi-directional current sensing and I2C communication. Based on the INA219 IC, it enables accurate real-time measurement of voltage, current, and power in both directions, making it ideal for applications like battery management, solar power systems, and embedded electronics diagnostics.

This compact module includes a 0.1Ω onboard shunt resistor and supports a wide input voltage range up to 26V, current up to ±3.2A, and high-speed I2C communication up to 3.4MHz. It provides high accuracy (±0.5%) and is compatible with platforms like Arduino, Raspberry Pi, and other microcontrollers.

Key Features:

• Based on INA219: High-precision current, voltage, and power monitor

• I2C Interface: Simple communication with configurable address (default: 0x40)

• Bi-directional Sensing: Measures both supply and return current

• Integrated 0.1Ω Shunt Resistor: For reliable readings up to ±3.2A

• Operating Voltage: 3.0V to 5.5V

• Voltage Range: 0V to 26V

• Resolution: ±0.8mA current resolution

• Accuracy: ±0.5%

• Mounting: 4-pin header (VCC, GND, SDA, SCL)

• Software Programmable: Fully configurable calibration registers

• Compact Size: 26mm x 22mm x 6mm

Applications:

• Battery level monitoring

• Solar panel energy tracking

• Power supply diagnostics

• Smart energy meters

• Embedded system monitoring

• Robotics and automation systems

Package Includes:

• 1 × CJMCU-219 INA219 I2C Current / Power Monitoring Sensor Module