X728 and Rpi4 - IOError: [Errno 121] Remote I/O error

• MJ

  Mikal Jenssen

  12/12/20, 3:39 AM

  Hi

  Running:
  PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"

  Fresh hardware install, following GUIDE from https://raspberrypiwiki.com/X728-Software

  Jumpers: PLD

  Step: 6 outputs:

  pi@raspberrypi:~ $ sudo python x728bat.py
  ******************
  Traceback (most recent call last):
    File "x728bat.py", line 31, in <module>
      print "Voltage:%5.2fV" % readVoltage(bus)
    File "x728bat.py", line 11, in readVoltage
      read = bus.read_word_data(address, 2)
  IOError: [Errno 121] Remote I/O error

  Why?

  EDIT: On first post i used a Rpi4B
  On the same OS, on a Rpi3 it works!

  So, how to make it work on the Rpi 4 then ?

   

   

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• MJ

  Mikal Jenssen

  12/22/20, 8:20 PM

  @li xia 

  Yes, as i mentioned in first post. I followed the guide on two Rpi4s.

  Only the Rpi3 worked.

   

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