OptionalconfigurationThe range, gain, and converter settings; the mode is chosen per conversion.
OptionalcurrentA current step to use instead, in microamps per count, such as a round 100.
OptionalmaxThe largest current the shunt will carry, in microamps, which sets the finest current step the calibration allows.
OptionalshuntThe shunt resistance in milliohms.
How an INA219 driver measures. A field left out keeps the default: a 100 milliohm shunt sized for 3.2 A, the common breakout, and the power-on register settings.