def __init__(self, port, baudrate):
super().__init__()
try:
self._serial = serial.Serial(port, baudrate=baudrate, timeout=None)
except SerialException as error:
err_str = str(error)
if "FileNotFoundError" in err_str:
err_str = "port not found"
message = "Unable to connect to " + port + ": " + err_str
# TODO: check if these error codes also apply to Linux and Mac
if error.errno == 13 and platform.system() == "Linux":
# TODO: check if user already has this group
message += "\n\n" + dedent("""\
Try adding yourself to the 'dialout' group:
> sudo usermod -a -G dialout <username>
(NB! This needs to be followed by reboot or logging out and logging in again!)"""
)
elif "PermissionError" in message:
message += "\n\n" + dedent("""\
If you have serial connection to the device from another program,
then disconnect it there.""")
elif error.errno == 16:
message += "\n\n" + "Try restarting the device."
raise ConnectionFailedException(message)
self._reading_thread = threading.Thread(target=self._listen_serial,
daemon=True)
self._reading_thread.start()
def _resolve_executable(self, executable):
result = self._which(executable)
if result:
return result
else:
msg = "Executable '%s' not found. Please check your configuration!" % executable
if not executable.startswith("/"):
msg += " You may need to provide its absolute path."
raise ConnectionFailedException(msg)