class TempSensorAdaptor(Thread):
deviceConfigReader = None
tempSensorEmulator = None
enableTempEmulator = False
currentTemp = 0
currentSensorData = None
sh = None
def __init__(self, configDir):
Thread.__init__(self)
self.deviceConfigReader = ConfigReader(configDir, "Device")
self.sh = sense_hat.SenseHat()
self.currentSensorData = SensorData("Temperature")
#SensorEmulator simulates temperature range from 25 degree to 15 degree
#temperature is changed after a random period of time in range 10 sec to 1 sec
self.tempSensorEmulator = SensorEmulator(30, 15, 10, 1)
self.tempSensorEmulator.daemon = True
self.tempSensorEmulator.start()
if self.deviceConfigReader.getProperty("enableEmulator") == "True":
self.enableTempEmulator = True
self.tempSensorEmulator.enableTempEmulator = True
def getCurrentTemp(self):
return self.currentTemp
def getCurrentSensorData(self):
self.currentSensorData.addNewValue(
self.currentTemp) # refresh SensorData only when it is called.
return self.currentSensorData
def run(self):
while True:
if self.enableTempEmulator: #If enableTempEmulator is false then using sense_hat to get current temperature!
self.currentTemp = self.tempSensorEmulator.getCurrValue()
else:
self.currentTemp = self.sh.get_temperature()
def setflagEnableTempEmulator(self, enableTempEmulator):
self.enableTempEmulator = enableTempEmulator
self.tempSensorEmulator.enableTempEmulator = enableTempEmulator
class SensorManagementApp(Thread):
tempSensorAdaptor = None
tempSensorData = None
tempActuatorEmulator = None
airConActuatorEmulator = None
mqttClient_TempSensor = None
mqttClient_AirCon = None
confiReader = None
pollCycleSecs = None
mqttGatewayHost = None
mqttGatewayPort = None
def __init__(self, configDir):
Thread.__init__(self)
#Set all the custom variables from configuration file
self.confiReader = ConfigReader(configDir, "Device")
self.pollCycleSecs = int(self.confiReader.getProperty("pollCycleSecs"))
self.confiReader = ConfigReader(configDir, "mqtt.gateway")
self.mqttGatewayHost = self.confiReader.getProperty("host")
self.mqttGatewayPort = int(self.confiReader.getProperty("port"))
#Start temperature Sensor Adaptor
self.tempSensorAdaptor = TempSensorAdaptor(configDir)
self.tempSensorAdaptor.daemon = True
self.tempSensorAdaptor.start()
#Initialize Temperature Actuator Emulator and AirConditioner Actuator Emulator
self.tempActuatorEmulator = TempActuatorEmulator()
self.airConActuatorEmulator = AirConActuatorEmulator()
#Initialize a mqttClient_TempSensor with custom call back methods and start listening on Temperature ActuatorData from gateway broker
self.mqttClient_TempSensor = mqttClientConnector.MqttClientConnector(
self.mqttGatewayHost, self.mqttGatewayPort, self.on_connect,
self.on_message_TempActuator, self.on_publish_TempSensorData,
self.on_subscribe_TempActuator)
self.mqttClient_TempSensor.connect()
self.mqttClient_TempSensor.subscribeTopic(
"iot/actuatorData/temperature", 1)
#Initialize a mqttClient_AirCon with custom call back methods and start listening on AirConditioner ActuatorData from gateway broker
self.mqttClient_AirCon = mqttClientConnector.MqttClientConnector(
self.mqttGatewayHost, self.mqttGatewayPort, self.on_connect,
self.on_message_AirConActuator, self.on_publish_AirConStatus,
self.on_subscribe_AirConActuator)
self.mqttClient_AirCon.connect()
self.mqttClient_AirCon.subscribeTopic(
"iot/actuatorData/airConditioner", 1)
# custom callback when connect to Gateway broker
def on_connect(self, mqttc, obj, flags, rc):
print("Successfully Connect to GatewayBroker!! rc: " + str(rc))
#custom callback when subscribed actuatorData arrive, then tiger temperature ActuatorEmulator
def on_message_TempActuator(self, mqttc, obj, msg):
print("TempActuatorData arrived from topic:" + msg.topic + " QoS:" +
str(msg.qos) + " Message:" + str(msg.payload.decode("utf-8")))
self.tempActuatorEmulator.process_message(str(msg.payload))
#custom callback when Temperature SensorData publish success
def on_publish_TempSensorData(self, mqttc, obj, mid):
print(
"Successfully published SensorData to topic iot/sensorData/temperature !! mid: "
+ str(mid))
#custom callback when successfully subscribe to Temperature Actuator
def on_subscribe_TempActuator(self, mqttc, obj, mid, granted_qos):
print(
"Successfully Subscribed to topic: iot/actuatorData/temperature !! "
+ str(mid) + " Granted_QoS:" + str(granted_qos))
#custom callback method when subscribed AirConditionerActuatorData arrive, then tiger air Conditioner ActuatorEmulater
def on_message_AirConActuator(self, mqttc, obj, msg):
print("AirConditionerActuatorData arrived from topic:" + msg.topic +
" QoS:" + str(msg.qos) + " Message:" +
str(msg.payload.decode("utf-8")))
self.airConActuatorEmulator.process_message(str(msg.payload))
#custom callback when air conditioner status publish success
def on_publish_AirConStatus(self, mqttc, obj, mid):
print(
"Successfully published AirConditionerStatus to topic iot/status/AirConditioner !! mid: "
+ str(mid))
#custom callback when air Conditioner actuatorData subscribe success
def on_subscribe_AirConActuator(self, mqttc, obj, mid, granted_qos):
print(
"Successfully Subscribed to topic: iot/actuatorData/airConditioner !! "
+ str(mid) + " Granted_QoS:" + str(granted_qos))
def run(self):
while True:
#Read new temperature sensorData and publish to gateway broker
self.tempSensorData = self.tempSensorAdaptor.getCurrentSensorData()
self.mqttClient_TempSensor.publishMessage(
"iot/sensorData/temperature",
str(self.tempSensorData.toDict()), 2)
sleep(self.pollCycleSecs) #wait for next poll
