INA219 I2C Module – Current, Voltage and Power Measurement
Product details
INA219 module is an intelligent current and voltage sensor designed to monitor voltages up to 26V and currents up to 3.2A. It communicates through an I2C (IIC) interface, making it easy to connect to microcontrollers such as Arduino, ESP32 and Raspberry Pi. Ideal for projects that need to track power consumption, battery status or electronic-device power. The module includes a precision amplifier and can calculate power in real time.
✅ Features:
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Voltage range: 0–26 V DC
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Maximum current: 3.2 A
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Interface: I2C (configurable address)
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Accurate measurement of current, voltage and power
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Compact dimensions and easy integration
➡ INA219 module application examples:
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Monitoring battery current and voltage
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Measuring power consumption in DC circuits
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Monitoring motor power supply
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Measuring solar panel output
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Checking current draw in IoT devices
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Electronic load testing
- BMS
💡 Most commonly recommended wiring
| INA219 | ESP32 |
|---|---|
| VCC | 3.3 V or 5 V |
| GND | GND |
| SDA | GPIO21 |
| SCL | GPIO22 |
The ESP32 allows various GPIO pins to be used for I2C communication (SDA and SCL) thanks to its flexible I2C hardware. Common GPIO choices include:
| Function | Recommended GPIO pins |
|---|---|
| SDA | 21, 18, 17, 25, 23, 4 (examples) |
| SCL | 22, 19, 16, 26, 5, 15 (examples) |
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