Serial connection does not work properly

[J4nn1K]

Sometimes the byte sequence from the serial port can't be decoded:

Traceback (most recent call last):
  File "scripts/test_trigger.py", line 20, in <module>
    main()
  File "scripts/test_trigger.py", line 8, in main
    trigger.calibrate()
  File "/home/jannik/Repos/demonstration-interface/src/components/trigger.py", line 43, in calibrate
    value = self.get_adc_value()
  File "/home/jannik/Repos/demonstration-interface/src/components/trigger.py", line 53, in get_adc_value
    line = self.read_serial()
  File "/home/jannik/Repos/demonstration-interface/src/components/trigger.py", line 87, in read_serial
    line = self.ser.readline().decode().rstrip()
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xf8 in position 8: invalid start byte

[J4nn1K]

When the node is terminated this method is executed:

def close_serial(self):
    self.ser.reset_input_buffer()
    self.ser.reset_output_buffer()
    self.ser.close()
    log.info(f'Connection closed')

The next time the node is started it receives no bytes via the serial port.
When the connection is not closed using ser.close and the node is started, it works.

[J4nn1K]

Look into this: https://stackoverflow.com/questions/36869394/reset-an-open-serial-port