IOT based Water Quality monitoring using Arduino, pH Sensor, Nodemcu ESP8266 & Blynk

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Water quality monitoring using TDS Meter:

Gravity: Analog pH Sensor / Meter Kit For Arduino by DFrobot:

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Project Description:
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In today’s episode, you will learn how to make an IoT based water quality monitoring system using Arduino, pH Sensor, Nodemcu esp8266 wifi module and Blynk Application. As this is an IoT “Internet of Things” based project, the water quality can be monitored from anywhere around the world. In this episode, I will practically explain how to measure the pH value of the Well water, and I will also explain whether the water under test is good or bad for health. In this Tutorial, you will also learn how to use the 16x2 LCD widget in the Blynk application. This is Version2 of the pH sensor Water Quality Monitoring System.

While in Version1 I covered the extreme basics like for example
What is pH?
How does a pH sensor work?
How to measure the pH value of different liquids?
In version1 I also explained how to calibrate the pH sensor. So if you are using a pH sensor for the First time then I highly recommend first you should watch Version1 and then you can resume from here.

In this episode, we will cover
1. Complete Circuit Diagram
2. pH sensor Unboxing
3. pH Sensor Pinout
4. pH sensor and Nodemcu ESP8266 wifi module interfacing with Arduino.
5. Arduino and Nodemcu Programming and finally
6. Testing

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Arduino Nano USB-C Type ( recommended):

ESP32 WiFi + Bluetooth Module for iOT Projects (recommended), more IO pins, improved speed, and supports a Lipo Battery:

Gravity: Analog pH Sensor / Meter Kit For Arduino by DFrobot:

Nodemcu ESP8266 WiFi Module:

LM7805 Voltage Regulator:

470uf capacitor:

330-ohm resistor:

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Project Related Tags:
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[dogeeatsveggies]

how i wish i have a professor like u in school ♥

[Gollammeister]

Be great if there was a sensor kit that measured temperature pH and ppm and then transmits that info via Bluetooth or WiFi to phone etc

[allenchafa]

wat modifications can we add to make sure that other factors like chemical and biological contaminants are catered for.
Your assistance is greatly appreciated.Need to pursue a similar project for drinking water purposes.

[dogeeatsveggies]

the music u use is very pleasing by the way sir

[blynkappli]

Great video sir. I have a question. How do you add the codes of EC sensor with this code? I am having trouble adding the EC sensor. Thank you

[OctraGamer]

the esp 8266 needs some programming?
sorry i don't understand if you spoke during the video, i don't speak english fluently

[AndrewHoeveler]

Omg thank you for this video! It's exactly what I'm trying to do with one exception, I'm trying to use the arduino uno running the ph code to pass the data to an ESP32 running in ESPHome. I don't want to use the esp32 directly with the sensor as the ADC isn't as good as those on the Uno, and the v1.1 of the ph sensor (as you and I both have) requires 5v, unlike the v2 that can run at 3.3v. By the time I add both those upgrades to an esp32 setup I might as well have just used the uno.
So it should be very simple to take the serial arduino TX > esp32 RX in YAML in esphome? 🙏

[Absurd-Indian-Guy]

I love your videos but I want to know how to mix two of these programs

- nodemcu programming
- sensors program
How do I mix these as all of your videos always explain them differently?

[FawazAyaz]

Sir I didn't understand, in video you said that you uploaded both the program to arduino ... How?? how u have combined both codes?
My next question is, if I use esp8266 arduino based board(wemos) and get the result on blynk, what changes should be made in code ?
please guide as I am working on the same project.

[hashirkayani]

Hello bro I have a very simple question Can we also measure Soil PH using this sensor kindly answer this question i really need your help

[rodrigolivbio]

Hi! That's amazing. I don't have the DFrobot sensor, so I am using the DM PH-4502C ph module, which i managed to calibrate properly and get the right readings on COM3 in arduino IDE. However, when i use your code, i don't get the readings on the virtual LCD in Blynk (it only says 'pH value'. Would you happen to know what the problem could be? Thank you!!!!

[laharisree]

Sir the components used are only arduino, nodemcu, pH meter and soldering kit right ... Where did you use the capasitor, bread board, pcb and other components mentioned in the above requirements

[beeivey]

Are there any projects that allow a similar system to measure things like lead?

[aisyahazmi]

Hello sir, i want to ask a question. I already follow the step but why the value doesn't come out at the blynk??? Can you help me sir..

[lukemarkg.carino]

Hello sir, what if I use the Label widget on the blynk application. What will be the code for that? I tried your code sir but it does not work. I am using New blynk now.

[jyosyulaamrutha]

What is that board on which Node MCU is placed??? Can we do it using breadboard?

[ddddaaddaaaa]

i have the same sensor. but it is not stable in reading ph level when water is disturbed. how can i stabilize the reading? or at least make it less sensitive.

[----]

can i get the link where to download this ?
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

[AbdulBasit-kpev]

Do these ph sensors go bad?
Cause they're expensive

[N.B-]

How would I change the code so that the ph scale is flipped. Like as In if my ph sensor is reading 14 in the scale for it to read 1 and if it was to read 13 it would actually read 2 how would I have to change my code thanks. And where would I write this code into. Thanks