use new udev rule to choose arduino's com port; code cleanup

ardvindo-server.py

@@ -14,36 +14,19 @@ class Ardvindo:
 
     def __init__(self, comPort):
         self.comPort = comPort
-        self.comConnection = None
-        self.connect()
-
-    def connected(self):
-        return self.comConnection != None and self.ping()
-
-    def reconnect(self):
-        while True:
-            if self.comConnection != None:
-                self.comConnection.close()
-            self.comConnection = serial.Serial(self.comPort, 9600, timeout = 0.5)
-            # establishing an serial connection automatically resets the arduino
-            # wait for arduino to restart
-            time.sleep(4)
-            if self._readline() == "ardvindo started":
-                log("Connection established!")
-                break
-            else:
-                log("Failed to connect!")
-
-    def connect(self):
-        if not self.connected():
-            self.reconnect()   
-
-    def ping(self):
-        return self.sendCommand("i") == "ardvindo"
+        self.comConnection = serial.Serial(self.comPort, 9600, timeout = 0.5)
+        # establishing an serial connection automatically resets the arduino
+        # wait for arduino to restart
+        time.sleep(4)
+        if self._readline() == "ardvindo started":
+            log("Connection established!")
+        else:
+            log("Failed to connect!")
+            raise Exception("Failed to connect!")
 
     def _writeline(self, line):
-        log("Sending '" + str(line) + "'... ")
-        self.comConnection.write(line + b"\n")
+        log("Sending '" + line + "'... ")
+        self.comConnection.write(line.encode() + b"\n")
 
     def _readline(self):
         line = self.comConnection.readline().decode().strip()
@@ -51,11 +34,11 @@ class Ardvindo:
         return line
 
     def sendCommand(self, cmd):
-        self._writeline(cmd.encode())
-        log("Command '" + cmd + "' sent!")
-        return self._readline()
+        self.comConnection.flushInput()
+        self._writeline(cmd)
 
-ardvindo = Ardvindo(serial.tools.list_ports.comports()[0][0])
+#ardvindo = Ardvindo(serial.tools.list_ports.comports()[0][0])
+ardvindo = Ardvindo("/dev/ardvindo")
 
 class ServerRequestHandler(socketserver.BaseRequestHandler):