This document presents a design for a low-cost real-time water quality monitoring system using an IoT platform. The system uses a pH sensor to measure the acidity or alkalinity of water. It consists of a pH sensor connected to an Arduino Uno and NodeMCU that transmits pH readings to a mobile app via Blynk. The system was tested with water and salt water, obtaining readings of 7.1 and 8.96 pH respectively. It allows remote monitoring of water quality and has applications in ensuring drinking water safety and household health.

1. GUIDE NAME : MRS.T.ASHA
TEAM MEMBERS :
PEDDIRAJ VAISHNAVI - 16K81A0443
POLEMERA MAHESH - 16K81A0445
PRASANNA PADALKAR - 16K81A0447
St.Martin's Engineering College
AN AUTONOMOUS INSTITUTE
A Non Minority College | Approved by AICTE | Affiliated to JNTUH, Hyderabad | NAAC-Accredited
‘A+’ Grade | 2(f) & 12(B) status (UGC) ISO 9001:2008 Certified | NBAAccredited | SIRO (DSIR) |
UGC-Paramarsh | Recognized Remote Center of IIT, Bombay
Dhulapally, Secunderabad – 500100
DEPARTMENT OF ELECTRONICS AND COMMUNICATION

2. ABSTRACT:
A DESIGN OF A LOW COST SYSTEM FOR REAL TIME MONITORING OF WATER
QUALITY IN IOT. THE SYSTEM HAVING PH SENSOR IS USED TO MEASURING
PHYSICAL PARAMETERS OF THE WATER.

3. INTRODUCTION:
• PH IS MEASURE OF RELATIVE AMOUNT FREE HYDROGEN OR
HYDROXYL IONS IN THE WATER.

4. ACIDIC WATER :
• SOUR AND METALLIC TASTE
• STAINED LAUNDRY
• BLUE-GREEN STAINING OF SINKS OR
HOUSEHOLD FIXTURES
• HEALTH ISSUES LIKE FOOD
DIGESTION
ALKALINE WATER
• BITTER TASTE, NO LATHER IN SOAPS
• ALKALINE WATER CAN HELP
RESTORE BALANCE OF BODY,
REDUCE TOOTH DECAY, AGING,
BLOCK CHRONIC DISEASES, HIGH
BLOOD PRESSURE DIABETICS,
DEHYDRATION AFTER EXCERCISE
• BUT >9 PH CAN CAUSE NAUSEA,
VOMITING, TREMORS, MUSCLE
TWEETING, CONFUSION.

5. BLOCK DIAGRAM:
PH4502C ARDUINO UNO NODEMCU
PH SENSOR
POWER SUPPLY
BLYNK

6. CIRCUIT DIAGRAM:

7. COMPONENTS REQUIRED:
SOFTWARE COMPONENTS:
• ARDUINO IDE
• LOCAL HOST
HARDWARE COMPONENTS:
• NODEMCU
• USB & SERIAL CABLE
• ARDUINO UNO
• PH SENSOR

8. PROGRESS AND OUTPUTS:
We have checked the output of the hardware using blink app and
Arduino ide. For water we got ph value as 7.1, for salt water we got
8.96 as approximate value.

9. ADVANTAGES :
• QUALITY OF WATER IS
KNOWN.
• RELIABLE DESIGN
• SAVES WATER AND
BETTER USE OF WATER
CAN BE DONE
DISADVANTAGES:
• AS THE INSTRUMENT IS
TO BE PLACED IN WATER
IT NEEDS TO BE
REPLACED DUE TO RUST,
FOUL AND DETERIORATE

10. APPLICATIONS:
• QUALITY OF DRINKING WATER CAN BE CHECKED.
• HOUSEHOLD APPLICATIONS , TO KEEPA CHECK ON HEALTH
ISSUES.