Version 1.1.0 of the INA219 library is now available with three major enhancements:

• Support for automatic gain adjustment, this makes getting valid readings over the full current/power range of the device very easy. Automatic gain is the default mode.

• The calibration calculation has been altered so that current overflow conditions are always detected so its no longer possible to obtain invalid current, power or shunt voltage readings.

• This version (v1.1.0) of the library is available in the PyPI Python Package Index (https://pypi.python.org/pypi/pi-ina219), which allows a more standard installation process.

At its simplest the following code is all thats required to get readings for the full supported current/power range of the device. See the README for further details.

#!/usr/bin/env python
from ina219 import INA219
from ina219 import DeviceRangeError
SHUNT_OHMS = 0.1


def read():
   ina = INA219(SHUNT_OHMS)
   ina.configure()
   print "Bus Voltage: %.3f V" % ina.voltage()
   try:
       print "Bus Current: %.3f mA" % ina.current()
       print "Power: %.3f mW" % ina.power()
       print "Shunt voltage: %.3f mV" % ina.shunt_voltage()
   except DeviceRangeError as e:
       # Current out of device range with specified shunt resister
       print e


if __name__ == "__main__":
   read()