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INA238 Power Monitor Guide

The INA238 power monitor is connected to I2C bus 1, which is Linux bus 7, at address 0x45:

sudo i2cdetect -y -r 7

Always pass -r — without it, i2cdetect skips the 0x40–0x4F range on Tegra. See the I2C bus map for which connector maps to which Linux bus.

To read voltage, current, and power, run the test script that ships with ARK-OS (on PATH):

ina238_test.py

Source: ina238_test.py

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