Unhandled SerialException

[maslovw]

Traceback (most recent call last):
  File "/home/cgw3bswtest/.local/bin/ssp9081", line 8, in <module>
    sys.exit(main())
  File "/home/cgw3bswtest/.local/lib/python3.10/site-packages/ssp_9081/bin/ssp9081.py", line 84, in main
    print("getI: ", power.getI())
  File "/home/cgw3bswtest/.local/lib/python3.10/site-packages/ssp_9081/control.py", line 53, in getI
    _,i = self.getUI()
  File "/home/cgw3bswtest/.local/lib/python3.10/site-packages/ssp_9081/control.py", line 38, in getUI
    res, resp = self.send('GETD')
  File "/home/cgw3bswtest/.local/lib/python3.10/site-packages/ssp_9081/control.py", line 34, in send
    return self.connection.recv()
  File "/home/cgw3bswtest/.local/lib/python3.10/site-packages/ssp_9081/interfaces.py", line 52, in recv
    resp = self.serial.read_until(b'\r')
  File "/home/cgw3bswtest/.local/lib/python3.10/site-packages/serial/serialutil.py", line 663, in read_until
    c = self.read(1)
  File "/home/cgw3bswtest/.local/lib/python3.10/site-packages/serial/serialposix.py", line 595, in read
    raise SerialException(
serial.serialutil.SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)