pH meter Arduino, pH Meter Calibration, DIYMORE pH Sensor, pH Sensor Arduino Code, pH of liquids

My Latest ESP32 Hydroponic System using pH sensor and EC Sensor

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Related Tutorials using the DFrobot pH Sensor Kit:
DFrobot pH Sensor with Arduino, working, calibration, and pH value of different liquids:

DFrobot pH Sensor with NodeMCU ESP8266 for water quality monitoring:

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Project Description:
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This is the analog pH sensor kit from the DIY MORE which is a bit different from the one developed by the DFrobot which I have already used in some of my previous videos explaining what is a pH sensor, it’s working, Calibration, and how to use a pH sensor to find the pH value of different liquids. I also used the DFrobot pH sensor kit for measuring the water quality using the Arduino board and I also used the pH sensor kit from the DFrobot in an IoT based water quality monitoring system using the NodeMCU ESP8266 WiFi module. So, if you want to learn how to use the pH sensor kit from the DFrobot then I highly recommend watching my previous videos.
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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:

pH Sensor Kit DIYMORE

pH Sensor Kit DFrobot

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Project Related Tags:
#pHsensor
#pHmeterArduino
#pHsensorCalibration
PH SENSOR ARDUINO
ARDUINO PH SENSOR
PH METER ARDUINO
ARDUINO PH METER
ARDUINO PH METER CODE
PH SENSOR ARDUINO CODE
PH SENSOR CALIBRATION
HOW TO CALIBRATE PH SENSOR
DIY MORE PH SENSOR
PH SENSOR FROM DIYMORE
DIY ARDUINO BASED PH METER
PH SENSOR WITH ARDUINO
PH SENSOR CALIBRATION
CALIBRATE PH SENSOR
EASIEST WAY TO CALIBRATE PH SENSOR
PH SENSOR KIT BY DIYMORE
PH SENSOR KIT BY DFROBOT

[FOATE]

To calibrate properly you need ph calibration fluids, usually 4.01 and 7.01. Then add this to code:
Before setup:
float calibph7 = 2.50; // example voltage at pH 7 calibration point
float calibph4 = 3.00; // example voltage at pH 4 calibration point
float m;
float b;
In setup:
m = (4.0 - 7.0) / (calibph4 - calibph7);

b = 7.0 - m * calibph7;
In loop:
float Voltage = analogRead(Pin) * 5 / 1024;

float phValue = m * Voltage + b;

This will give you very precive measurements even with cheap sensor. You can use something like ads1115 to improve accuracy.
Also i recommend setting the pot to 2.5 when probe is in pH 7 calibration fluid.

[dogeeatsveggies]

i just wanna say you guys are one of the best... if not, the best when explaining these stuff to beginners!
i hate watching YouTube videos for "beginners", and yet the person explains it like they're talking to some experienced engineer.. though i could understand what they say, i just hate it cause they're not "teaching"... they're only "showing".. and sometimes they come off as arrogant to me, cause its like they expect everyone to understand what they're showing..
though the electronic clinic shows their expertise by knowing how to make someone with no idea in the electronics field be knowledgeable in just a couple of videos..
simple demonstration, simple and easy to understand code.... English is not your primary language, but i appreciate how on every video you do your best explaining things so that you could help as many as you can.. you deserve more views..

[iffahsyamimi]

Great project for IT or engineering students who trying to explore IoT projects using Arduino board. Very detailed explanation and easy to understand.

[wyatt]

I experienced some wild variations in the collected PH value at first but increasing the delay in the time between measurements from 30 to 100 seemed to have solved my issue. Thank you so much for creating this video. It helped me a lot.

[chimpofm]

Most comprehensive tutorial i have seen on this module

[Fachripm_Fai]

Very simple and clear about ph, thanks for nice tutorial

[ranajakub]

don't underestimate the importance of cleaning your pH probe with the cleaning liquid. Before cleaning I got a reading of 0.5V in water and after it I got 2.8V. Still some calibration to do, but the difference is VERY big.

[rollyavecilla]

where did you get this:
float calibration_value = 21.34 - 0.7

[Alakay]

Thanks for the video. I'm trying this with a Micro:bit, but it is only showing max PH regardless of actual PH of liquid. Any help would be appreciated

[Vega-]

Thanks, very good video! One question, I have read is not ideal to storage the PH probe with distilled water in order to last longer, should be PH 4 solution instead. do you have any information about this? thanks again! cheers

[afiffarhati]

what is the role of the ph sensor module (or shield), the little card that links the probe to the arduino card?
I do not have this module and I cannot obtain it, How could I replace it and make everything work?

[andresceballos]

hello what a good video

I am using the same module to measure ph, but I am feeding it with 3.3v

At what levels is the analog output of the module calibrated?

[simonyelfimov]

Why do I need to use 3.3v for ESP32-Dev and how does that affect the calibration formula? I've tried the "(id(ph_raw).state) * (3.3 / 4095);" and I'm getting very low number 0.00082

[LojiniLoji-pz]

i used nodemcu esp8266, 3.3 v with ph sensor, output is 3.3, when i used trimmer does not change volt.

[robertocarmona]

Estimated Senior

When I want to compile the program. The system shows a fail for SimpleTimer.h it says (SimpleTimer.h "no such file or directory") Could you help me about it ?
Best Regards

[aquariumautonome]

good video my friend with indian accent

[NewAquariumHobby]

Dear i hv same black color pH probe when i short its connector and try to get 2.5 V, min voltage came at 2.7 & VR reached its end then i adjust VR to give 3.5 volt as i want to read pH from 6.5 to 9.0 on my aquarium. Its working good only issue is the variation in value from 2.0 to 9.0 when i put probe direct in aquarium but read stable value when i put water in separate small bowl, plz guide me what can be issue of pH value variation, is voltage set at 3.5 instead of 2.5 is issue.

[jean-claudejacquet]

Hi from France, I would like to know utility of the second trimer on the board DIY-More ? And how setup it ?

[mbstud]

hi! Is there an alternative code I can use to display the results without requiring adafruit? I don't plan to use a separate display for the results. Thank you and great video!

[ybendek]

Awesome video, I need to say one of the best I found....could you give more detail for what is used the other component 4:03 You use one for calibration...but, what is the function behind the other one?