I have been trying to add additional GPIO pins using IO Pi plus. However when I followed the tutorial 1 ,
File "/home/pi/ABElectronics_Python_Libraries/IOPi/ABE_IoPi.py", line 100, in __init__
self._bus.write_byte_data(self.address, self.IOCON, self.config)
IOError: [Errno 5] Input/output error
I get this error.I also have a doubt. It was mentioned that the pi plus ca be separately powered. Hence I have isolated the two pins from pi.And I have powered externally the 5V and GND pin. Can you please let me know where the error is ?