Merge pull request vascop#2 from ch-aurich/master

improved stability on my ubuntu system

Author: vascop

arduino/arduino.py

@@ -8,6 +8,7 @@ class Arduino(object):
 
     def __init__(self, port, baudrate=115200):
         self.serial = serial.Serial(port, baudrate)
+        self.serial.write('99')
 
     def __str__(self):
         return "Arduino is on port %s at %d baudrate" %(self.serial.port, self.serial.baudrate)

prototype.pde

@@ -33,7 +33,11 @@ void loop() {
             analogWrite(readData(), readData()); break;
         case 4 :
             //read analog value
-            Serial.println(analogRead(readData()));
+            Serial.println(analogRead(readData())); break;
+        case 99:
+            //just dummy to cancel the current read, needed to prevent lock 
+            //when the PC side dropped the "w" that we sent
+            break;
     }
 }
 
@@ -44,4 +48,4 @@ char readData() {
             return Serial.parseInt();
         }
     }
-}
+}