class HumiditySensor:
def __init__(self, spi, pin, conn, pump_pin):
self.pin = pin
self.spi = spi
self.conn = conn
self.pump = DeviceController(pin=pump_pin)
self.value = None
self.status = None
self.timestamp = None
self.force = False
def set_min_max(self, min_humidity, max_humidity):
self.pump.add_condition(lambda humidity, c_type: min_humidity >
humidity and c_type == 'humidity')
def unset_min_max(self):
self.pump.reset()
def set_pump_state(self, state):
self.pump.set_state(state)
def get_pump_state(self):
return self.pump.get_state()
def read(self):
# read SPI data from MCP3008 chip, 8 possible adc's (0 thru 7)
r = self.spi.xfer2([1, 8 + self.pin << 4, 0])
self.value = ((r[1] & 3) << 8) + r[2]
if self.value is not None:
if self.value > 1023 or self.value < 0:
self.status = 'INCOHERENT_READ'
else:
self.value = round(50 * (cos(pi * self.value / 1023) + 1))
self.status = 'OK'
if self.force is False:
self.pump.set_duration(5)
self.pump.verify_conditions(self.value, 'humidity')
else:
self.pump.set_duration(None)
else:
self.status = 'FAILED_TO_RETRIEVE'
return self.value, self.status
def save(self):
self.timestamp = self.conn.save('HUMIDITY', {
'value': self.value,
'status': self.status
})
def log(self):
print(
f"[HumiditySensor] Humidity: {self.value} - Status: {self.status} - Timestamp: {self.timestamp}"
)
def run(self, force):
self.force = force
self.read()
self.save()
self.log()
return self.get_pump_state()
class TemperatureSensor:
def __init__(self, pin, heater_pin, conn):
self.pin = pin
self.retries = 5
self.heater = DeviceController(pin=heater_pin)
self.conn = conn
self.sensor = Adafruit_DHT.DHT22
self.value = None
self.status = None
self.timestamp = None
self.force = False
def set_min_max(self, min_temperature, max_temperature):
self.heater.add_condition(
lambda temperature, c_type: min_temperature > temperature and c_type == 'temperature')
def unset_min_max(self):
self.heater.reset()
def set_heater_state(self, state):
self.heater.set_state(state)
def get_heater_state(self):
return self.heater.get_state()
def read(self):
_, self.value = Adafruit_DHT.read_retry(self.sensor, self.pin, self.retries)
if self.value is not None:
self.value = round(self.value, 1)
if self.value > 80 or self.value < -40:
self.status = 'INCOHERENT_READ'
else:
self.status = 'OK'
if self.force is False:
self.heater.verify_conditions(self.value, 'temperature')
else:
self.status = 'FAILED_TO_RETRIEVE'
return self.value, self.status
def save(self):
self.timestamp = self.conn.save('TEMPERATURE', {'value': self.value, 'status': self.status})
def log(self):
print(f"[TemperatureSensor] Temperature: {self.value} - Status: {self.status} - Timestamp: {self.timestamp}")
def run(self, force):
self.force = force
self.read()
self.save()
self.log()
return self.get_heater_state()
class PhotoSensor:
def __init__(self, spi, pin, conn, lamp_pin):
self.spi = spi
self.pin = pin
self.conn = conn
self.lamp = DeviceController(pin=lamp_pin)
self.value = None
self.status = None
self.timestamp = None
self.force = False
def set_min_max(self, min_illumination, max_illumination):
self.lamp.add_condition(lambda photo, c_type: min_illumination > photo and c_type == 'photo')
def unset_min_max(self):
self.lamp.reset()
def set_lamp_state(self, state):
self.lamp.set_state(state)
def get_lamp_state(self):
return self.lamp.get_state()
def read(self):
# read SPI data from MCP3008 chip, 8 possible adc's (0 thru 7)
r = self.spi.xfer2([1, 8 + self.pin << 4, 0])
self.value = ((r[1] & 3) << 8) + r[2]
if self.value is not None:
if self.value > 1023 or self.value < 0:
self.status = 'VALUE_OUT_OF_BOUNDS'
else:
self.status = 'OK'
self.value = round(50 * (cos(pi * self.value / 1023) + 1))
if self.force is False:
self.lamp.verify_conditions(self.value, 'photo')
else:
self.status = 'CANNOT_READ_LDR'
return self.value, self.status
def save(self):
self.timestamp = self.conn.save('ILLUMINATION', {'value': self.value, 'status': self.status})
def log(self):
print(f"[PhotoSensor] Value: {self.value} - Status: {self.status} - Timestamp: {self.timestamp}")
def run(self, force):
self.force = force
self.read()
self.save()
self.log()
return self.get_lamp_state()