High-side current, voltage and power measurement over I2C – 0.1 Ω shunt on board
Put the INA219 in series with a supply and it tells you exactly what a circuit draws – bus voltage (0–26 V), shunt voltage, current (±3.2 A with the fitted R100 shunt, 0.8 mA resolution) and calculated power – all over I2C, with 12-bit resolution and programmable gain. High-side sensing means the ground is left intact, so it works on motor drivers, battery monitors and solar chargers. Pins: Vcc, GND, SCL, SDA, Vin+, Vin−; solder bridges A0/A1 set the address (0x40–0x45). Libraries exist for Arduino, ESP-IDF, MicroPython and Raspberry Pi. 3–5 V logic.
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