Put exception protection in setDTR() to avoid fake serial connections

Sender.py

@@ -428,7 +428,10 @@ def open(self, device, baudrate):
 						xonxoff=False,
 						rtscts=False)
 		# Toggle DTR to reset Arduino
-		self.serial.setDTR(0)
+		try:
+			self.serial.setDTR(0)
+		except IOError:
+			pass
 		time.sleep(1)
 		CNC.vars["state"] = CONNECTED
 		CNC.vars["color"] = STATECOLOR[CNC.vars["state"]]
@@ -437,7 +440,10 @@ def open(self, device, baudrate):
 		# toss any data already received, see
 		# http://pyserial.sourceforge.net/pyserial_api.html#serial.Serial.flushInput
 		self.serial.flushInput()
-		self.serial.setDTR(1)
+		try:
+			self.serial.setDTR(1)
+		except IOError:
+			pass
 		time.sleep(1)
 		self.serial.write(b"\r\n\r\n")
 		self._gcount = 0
@@ -665,7 +671,7 @@ def runEnded(self):
 	#----------------------------------------------------------------------
 	# Purge the buffer of the controller. Unfortunately we have to perform
 	# a reset to clear the buffer of the controller
-	#----------------------------------------------------------------------
+	#---------------------------------------------------------------------
 	def purgeController(self):
 		time.sleep(1)
 		# remember and send all G commands

bCNC.py

@@ -2051,6 +2051,13 @@ def run(self, lines=None):
 			#	return
 			self.statusbar.setLimits(0, 9999)
 			self.statusbar.setProgress(0,0)
+
+			#class MyQueue:
+			#	def put(self,line):
+			#		print ">>>",line
+			#self._paths = self.gcode.compile(MyQueue(), self.checkStop)
+			#return
+
 			self._paths = self.gcode.compile(self.queue, self.checkStop)
 			if self._paths is None:
 				self.emptyQueue()
@@ -2061,6 +2068,7 @@ def run(self, lines=None):
 					_("Not gcode file was loaded"),
 					parent=self)
 				return
+
 			# reset colors
 			for ij in self._paths:
 				if not ij: continue