Shreyas B VPavanKumar E
Published © GPL3+

Smart pH Sensor

This pH Sensor reads the pH value of any liguid and alerts by SMS with the liquid and its pH value

IntermediateProtip4 hours499
Smart pH Sensor

Things used in this project

Story

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Schematics

pH Sensor Circuit connection

Code

Python code

Python
import json, time, conf
from boltiot import Bolt, Sms #Import Sms and Bolt class from boltiot library

value1 = 0
value2 = 6.5
value3 = 7.5
value4 = 14

mybolt = Bolt(conf.API_KEY, conf.DEVICE_ID) #Create object to fetch data
sms = Sms(conf.SID, conf.AUTH_TOKEN, conf.TO_NUMBER, conf.FROM_NUMBER) #Create object to send SMS
response = mybolt.serialRead('10')
print response

while True:
    print("Reading Sensor Value")
    response = mybolt.serialRead('10')  #Fetching the value from Arduino
    data = json.loads(response)
    ph_value = data['value'].rstrip()
    print("pH Valueis:"+str(data['value']))
    try:
        if ph_value > value1 and ph_value < value2:
            print("Making request to send SMS")
            response = sms.send_sms("The liquid is ACIDIC. pH value of the liquid is:"+str(ph_value))
            print("Response recieved:"+ste(response.status))
        elif ph_value > value2 and ph_value < value3:
            print("Making request to send SMS")
            response = sms.send_sms("The liquid is NEUTRAL. pH value of the liquid is:"+str(ph_value))
            print("Response recieved:"+ste(response.status))
        elif ph_value > value3 and ph_value < value4:
            print("Making request to send SMS")
            response = sms.send_sms("The liquid is ALKALINE. pH value of the liquid is:"+str(ph_value))
            print("Response recieved:"+ste(response.status))
    except Exception as e:
        print("Error occured: Below are the details")
        print(e)
    time.sleep(100) #reads sensor value for every 100 seconds

javascript code

JavaScript
setChartLibrary('google-chart');
setChartTitle('pH Sensor');
setChartType('lineGraph');
setAxisName('Time Stamp','pH Value');
plotChart('time_stamp','value');

Configuration code

Python
SID = ' '
AUTH_TOKEN = ' '
FROM_NUMBER = ' '
TO_NUMBER = ' '
API_KEY = ' '
DEVICE_ID = ' '

Arduino code

Arduino
const int analogInPin = A0; 
int sensorValue = 0; 
unsigned long int avgValue; 
float b;
int buf[10],temp;
void setup() {
 Serial.begin(9600);
}
 
void loop() {
 for(int i=0;i<10;i++) 
 { 
  buf[i]=analogRead(analogInPin);
  delay(100);
 }
 for(int i=0;i<9;i++)
 {
  for(int j=i+1;j<10;j++)
  {
   if(buf[i]>buf[j])
   {
    temp=buf[i];
    buf[i]=buf[j];
    buf[j]=temp;
   }
  }
 }
 avgValue=0;
 for(int i=2;i<8;i++)
 avgValue+=buf[i];
 float pHVol=(float)avgValue*5.0/1024/6;
 float phValue = -5.70 * pHVol + 8.65;
 Serial.print("pH Value = ");
 Serial.println(phValue);
 
 delay(20);
}

Credits

Shreyas B V

Shreyas B V

1 project • 1 follower
PavanKumar E

PavanKumar E

0 projects • 0 followers

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