Accidental Fire Alert System Built with Bolt - IoT

from boltiot import Bolt , Sms
import time , conf , json , sys , statistics
r = 5
c = 5
data_set = []
alarm_state = 0

mybolt = Bolt(conf.API_KEY,conf.DEVICE_ID)#importing bolt api key and devide id from conf.py
sms = Sms(conf.SSID,conf.AUTH_TOKEN,conf.TO_NUM,conf.FROM_NUM)# importing twillo ssid , auth ,and numbers

def check_device(): #  function for checking the device 
        data = json.loads(mybolt.isOnline())
        if data["value"]=="online":
                print('Device online')
                mybolt.digitalWrite("1","HIGH")
        else:
                print('Device offline.')
                sys.exit()

def get_temp():# function for getting temp values
        data = json.loads(mybolt.analogRead("A0"))
        if data["success"]==1:
                val =float(data["value"])
                temp =  100 * val / 1024
                return temp

        else:
                return -999

def set_limits(data_set,r,c):# function for z-score
        if len(data_set)<r:
                return None
        if len(data_set)>r:
                data_set=data_set[len(data_set)-r:]

        Mn = statistics.mean(data_set)
        Variance = 0
        for data in data_set:
                Variance += (data - Mn) ** 2
        Zn = c * ((Variance / r) ** 0.5)
        H = data_set[r-1] + Zn
        return H

def run_alarm(val): #function for buzzor and sms
        print('Risk of a possible firm.Raising alarm.')
        sms.send_sms('Sudden raise in temperature. Can be possibly a fire. The temperature is '+str(val))
        mybolt.digitalWrite('0','HIGH')
        global alarm_state
        alarm_state = 1

def stop_alarm(val):
                mybolt.digitalWrite('0','LOW')

check_device()

while 1: # indefinite loop for countinous tracking of temparature
        try:
                temp = get_temp()
                print('The temperature is ',temp)
                limit=set_limits(data_set,r,c)
                if not limit:
                        print('Not enough value to conduct Z-score analysis.Need more values.')
                        data_set.append(temp)
                else:
                        if temp > limit:
                                run_alarm(temp)
                        else:
                                if alarm_state:
                                        stop_alarm(temp)
                                        alarm_state = 0
                        data_set.append(temp)

                time.sleep(10)

        except KeyboardInterrupt: # press ctrlc + c for stopping the loop
                print('Device Stopped.')
                mybolt.digitalWrite('1','LOW')
                mybolt.digitalWrite('0','LOW')
                sys.exit()