Soil Moisture Monitoring with Bolt IoT

import config    #this file contains the SSID API Key and Bolt device ID
import json,time,math,statistics    #used to call methods to fetch data...calculate Z cross....and give delays
from boltiot import Sms,Bolt     #used to call methods to sen SMS and use Bolt WiFi Module

def compute_bounds(history_data,frame_size,factor):       #This function was created to calculate the Mean,Variance and Z crosss
    if len(history_data)<frame_size:
        return None

    if len(history_data)>frame_size:
        del history_data[0:len(history_data)-frame_size]

    Mn=statistics.mean(history_data)
    Variance=0

    for data in history_data :
        Variance += math.pow((data-Mn),2)

    Zn = factor * math.sqrt(Variance / frame_size)
    High_bound = history_data[frame_size-1]+Zn
    Low_bound = history_data[frame_size-1]-Zn

    return [High_bound,Low_bound]        #This function returns a Upper Bound Threshold and Lower Bound Threshold

mybolt = Bolt(config.API_KEY, config.DEVICE_ID)        #To configure the Bolt WiFi Module
sms = Sms(config.SSID, config.AUTH_TOKEN, config.TO_NUMBER, config.FROM_NUMBER)       #To configure the Twilio SMS Service
history_data=[]           # This is a list to store the values recieved from the Sensor 

while True:
    response = mybolt.analogRead('A0')     #Read the values
    data = json.loads(response)     #store the response given recieved in JSON format
    if data['success'] != 1:            # To detect if the value recieved contains keyword success and corresponding value should be 1 denoting STATUS OK
        print("There was an error while retriving the data.")
        print("This is the error:"+data['value'])
        time.sleep(10)
        continue

    print ("This is the value "+data['value'])  #To print the Analog Value received form the Bolt WiFi Module

    try:
        soil=(int(data['value'])/1024)*100   #To convert the vales in Percentage
	soil = 100-soil	     #To find the moisture content left in soil out of total 100%
        print ("The Moisture content is ",soil," % mg/L")
    except e:
        print("There was an error while parsing the response: ",e)
        continue

    bound = compute_bounds(history_data,config.FRAME_SIZE,config.MUL_FACTOR)

    if not bound:
        required_data_count=config.FRAME_SIZE-len(history_data)
        print("Not enough data to compute Z-score.Need",required_data_count,"more data points")
        history_data.append(soil)
        time.sleep(10)
        continue
    try:
        if soil < 30:
            print ("The Moisture level has decreased. Sending an SMS.")
            response = sms.send_sms("Please water the plants")
            print("This is the response ",response)

    except e:
        print("There was an error while parsing the response: ",e)
        continue
      
    try:
        if soil > bound[0] :
            print ("The Moisture level increased suddenly. Sending an SMS.")
            response = sms.send_sms("Someone is damaging the plants")
            print("This is the response ",response)
        elif soil < bound[1]:
            print ("The Moisture level decreased suddenly. Sending an SMS.")
            response = sms.send_sms("Someone is damaging the plants")
            print("This is the response ",response)

        print("HIGH BOUND = ",bound[0])
        print("LOW BOUND = ",bound[1])
        history_data.append(soil)

    except Exception as e:
        print ("Error",e)
    time.sleep(10)