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Remove callback before adding a new one

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Ben Nuttall
2015-09-21 11:19:21 +01:00
parent 9219b01081
commit 6c98086bff
1 changed files with 1 additions and 0 deletions
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gpiozero/input_devices.py
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@@ -34,6 +34,7 @@ class InputDevice(GPIODevice):
def add_callback(self, callback=None, bouncetime=1000): def add_callback(self, callback=None, bouncetime=1000):
if callback is None: if callback is None:
raise InputDeviceError('No callback function given') raise InputDeviceError('No callback function given')
self.remove_callback()
GPIO.add_event_detect(self.pin, self._edge, callback, bouncetime) GPIO.add_event_detect(self.pin, self._edge, callback, bouncetime)
def remove_callback(self): def remove_callback(self):