Grove/Headers INA3221 Breakout Board - 3 Channel Current/Voltage Monitor - Compare to INA219 Can measure 3 independent channels at once. 3 sets of current and voltages. I2C interface. Supports Arduino (5.0V I2C) and Raspberry Pi (3.3V I2C) Senses 0V to +26V Software drivers provided for Arduino and Raspberry Pi Full Documentation and Software for Raspberry Pi and Arduino on www.switchdoc.com