I2C sensor measuring current, voltage and power across a shunt. For consumption metering.
The INA219 is the convenient way to measure how much energy a circuit draws: it senses the drop across a shunt resistor and the bus voltage, computing current and power internally. Everything comes out over I2C, already scaled.
It's used in battery monitoring, IoTITermIoT (Internet of Things)The IoT (Internet of Things) is the network of physical objects with sensors, software and connectivity that collect and exchange data and act autonomously.View profile-node consumption profiling and small solar panels. For higher currents or isolated measurement, the INA226/INA3221 family extends the range.
Pros
- Measures current, voltage and power over I2C
- No analogue maths or MCU ADC needed
- Ideal for profiling IoT consumption
Cons
- Bus limited to 26 V
- Non-isolated (high-side) measurement