class PWMLight(DimmableLight):
def __init__(self, server, pin, freq=1000):
super().__init__(server, 'light-' + str(uid), \
self.get_state, self.set_state, \
self.get_level, self.set_level)
if pin in pwm_pins:
self.dimmable = True
self._pin = PWM(GPIO(pin), freq=freq, duty=0)
else:
self.dimmable = False
def get_state(self):
return self._pin.value(), 0
def set_state(self, state):
if state == 'on' or state == '1' or state == 'True':
self._pin.on()
return True, 0
else:
self._pin.off()
return False, 0
def get_level(self):
return self._pin.duty(), 0
def set_level(self, level):
#convert brightness from percent (0 - 100) to duty (0 - 1023)
duty = round(1023 * (int(brightness)/100))
self._pin.duty(duty)
return level, 0
class Led(object):
PWM_FREQ = 500
PWM_DUTY_MAX = 1023
PWM_DUTY_MIN = 0
def __init__(self, pin_nr, pwm=False):
self.Pwm = pwm
self.IsOn = False
self.Pin = Pin(pin_nr, Pin.OUT)
if pwm is True:
self.Pin = PWM(self.Pin, freq=self.PWM_FREQ, duty=0)
else:
self.Off()
def PwmFreq(self):
return self.PWM_FREQ
def PwmDutyMax(self):
return self.PWM_DUTY_MAX
def PwmDutyMin(self):
return self.PWM_DUTY_MIN
def On(self):
if self.Pwm is True:
self.Pin.duty(self.PWM_DUTY_MAX)
else:
self.Pin.on()
self.IsOn = True
def Off(self):
if self.Pwm is True:
self.Pin.duty(0)
else:
self.Pin.off()
self.IsOn = False
def Toggle(self):
if self.IsOn is False:
self.On()
self.IsOn = True
else:
self.Off()
self.IsOn = False
def State(self):
if self.IsOn is True:
return 1
else:
return 0
# Get or set the LED intensity.
def Intensity(self, value=None):
# Check if the LED is configured in PWM mode.
if self.Pwm is True:
# If a value argument is passed set the duty
# cycle.
if value is not None:
if value > self.PWM_DUTY_MAX:
value = self.PWM_DUTY_MAX
elif value < self.PWM_DUTY_MIN:
value = self.PWM_DUTY_MIN
self.Pin.duty(value)
# If no value is passed get the duty cycle.
else:
return self.Pin.duty()
else:
return -1
