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INA219 library (example) for MicroPython on ESP8266
from machine import Pin, I2C
from ina219 import INA219
from logging import INFO
i2c = I2C(-1, Pin(5), Pin(4))
ina = INA219(SHUNT_OHMS, i2c, log_level=INFO)
print("Bus Voltage: %.3f V" % ina.voltage())
print("Current: %.3f mA" % ina.current())
print("Power: %.3f mW" % ina.power())
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