def update_data():
""" function to update temp, humidity and Alarm data on display """
global update_interval, temperature, unit
threading.Timer(
update_interval,
update_data).start() # to autorun function once every update interval
humidity, temperature = sensorRead.get_TempHum()
time = datetime.now().strftime('%b-%d-%Y %H:%M:%S')
ui.label_updateTime.setText(time)
if (unit == 1 and temperature !=
None): # if unit is set to degF convert temperature to degF
temperature = sensorRead.todegF(temperature)
if (temperature == None): # handling data not being sent
ui.lcd_temperature.display("Err")
else:
ui.lcd_temperature.display(temperature)
if (humidity == None): # handling data not being sent
ui.lcd_humidity.display("Err")
else:
ui.lcd_humidity.display(humidity)
alarm_check()
update_last_temp()
update_avg_temp()
update_max_temp()
update_min_temp()
update_last_hum()
update_avg_hum()
update_max_hum()
update_min_hum()
def addDataToDb():
""" function to update temp, humidity into database
the timestamp is split into different keys for year,month , day, hour, min and sec
as tinydb cannot read in the python datetime type"""
global dbSamplingInterval, docId
threading.Timer(
dbSamplingInterval,
addDataToDb).start() # to autorun function once every update interval
humidity, temperature = sensorRead.get_TempHum(
) #read temperature and humidity
if (temperature == None):
temperature = -1
if (humidity == None):
humidity = -1
db.insert({
'timestamp_year': datetime.now().year,
'timestamp_month': datetime.now().month,
'timestamp_day': datetime.now().day,
'timestamp_hour': datetime.now().hour,
'timestamp_minute': datetime.now().minute,
'timestamp_second': datetime.now().second,
'temperature': temperature,
'humidity': humidity
})
def publishTempHumidity():
"""" Function to publish temp and humidity data to AWS using MQTT"""
global dbSamplingInterval,topic
threading.Timer(dbSamplingInterval,publishTempHumidity).start() # to autorun function once every update interval
ts=datetime.now()
h,t= sensorRead.get_TempHum()
msg = '"ts": "{}", "Temperature": "{}", "Humidity": "{}"'.format(ts, t,h)
msg = '{'+msg+'}'
myAWSIoTMQTTClient.publish(topic, msg, 1)
def getData(unit):
""" function to get latest data from sensors ,
accounts for unit change from the webpage and
converts temperature values accordingly"""
h,t= sensorRead.get_TempHum()
if(t==None):
t=-1
if(h==None):
h=-1
if(unit==1):
t=sensorRead.todegF(t)
return (str(round(t,2))+','+str(round(h,2)))