Untitled

sudo python3 x728.py
Traceback (most recent call last):
  File "/home/orangepi/x728/x728.py", line 21, in <module>
    print("Voltage: %.2fV" % readVoltage())
  File "/home/orangepi/x728/x728.py", line 9, in readVoltage
    read = bus.read_word_data(address, 2)
OSError: [Errno 16] Device or resource busy