PWMLed: better logging, building LED on activation.

specialized/plugin_pwmled.py

@@ -18,19 +18,30 @@ class PWMLedPlugin(PluginProcessBase):
  self._bcm_pin = SETTINGS.pwmled.get('bcm_pin', default=None, cast_to_type=int, ge=0, le=27, allow_none=True)
  self._frequency = SETTINGS.pwmled.get('frequency', default=100, cast_to_type=int, ge=10, le=10000)
  self._pwmled = None
+ self._active = False
  self._rebuild_pwmled()
 
  def _rebuild_pwmled(self):
  old_value = 0.
  if self._pwmled is not None:
- old_value = self._pwmled.value
+ if not self._active or self._bcm_pin is None:
+ _log.info('Disabling PWM led.')
+ else:
+ old_value = self._pwmled.value
  self._pwmled.off()
  self._pwmled = None
- if self._bcm_pin is not None:
- _log.debug('Rebuilding PWM led on pin %d with frequency %d.', self._bcm_pin, self._frequency)
+ if self._bcm_pin is not None and self._active:
+ _log.info('Rebuilding PWM led on pin %d with frequency %d.', self._bcm_pin, self._frequency)
  self._pwmled = PWMLED(self.bcm_pin, frequency=self.frequency, initial_value=old_value)
- else:
- _log.debug('Disabled PWM led.')
+
+ def __enter__(self):
+ self._active = True
+ self._rebuild_pwmled()
+ return self
+
+ def __exit__(self, exc_type, exc_val, exc_tb):
+ self._active = False
+ self._rebuild_pwmled()
 
  @pyro_expose
  @property