Added disable_reporting() on exit

This has been suggested by @kdickie59 in
#14
I cannot test it as it's fine on my RPI3 with the Uno
but hopfully helps!

examples/print_analog_data.py

@@ -33,7 +33,6 @@ def myPrintCallback(self, data):
         self.timestamp += (1 / self.samplingRate)
 
     def stop(self):
-        self.board.samplingOff()
         self.board.exit()
 
 print("Let's print data from Arduino's analogue pins for 10secs.")

pyfirmata2/pyfirmata2.py

@@ -386,8 +386,12 @@ def setSamplingInterval(self, intervalInMs):
 
     def exit(self):
         """Call this to exit cleanly."""
-        # First detach all servo's, otherwise it somehow doesn't want to close...
+        for a in self.analog:
+            a.disable_reporting()
+        for d in self.digital:
+            d.disable_reporting()
         self.samplingOff()
+        # First detach all servo's, otherwise it somehow doesn't want to close...
         if hasattr(self, 'digital'):
             for pin in self.digital:
                 if pin.mode == SERVO:
@@ -472,6 +476,8 @@ def enable_reporting(self):
 
     def disable_reporting(self):
         """Disable the reporting of the port."""
+        if not self.reporting:
+            return
         self.reporting = False
         msg = bytearray([REPORT_DIGITAL + self.port_number, 0])
         self.board.sp.write(msg)
@@ -564,6 +570,8 @@ def enable_reporting(self):
     def disable_reporting(self):
         """Disable the reporting of an input pin."""
         if self.type == ANALOG:
+            if not self.reporting:
+                return
             self.reporting = False
             msg = bytearray([REPORT_ANALOG + self.pin_number, 0])
             self.board.sp.write(msg)

setup.py

@@ -7,7 +7,7 @@
 
 setup(
     name='pyFirmata2',
-    version='2.4.5',
+    version='2.4.6',
     description="Use your Arduino as a data acquisition card under Python",
     long_description=long_description,
     author='Bernd Porr',