How to use MQ135 Gas Sensor with ESP32 using BLYNK IoT Cloud & LCD Display

ARDUINO CODE:
drive.google.c...
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[@asyrafzainal2299]

why my push notification and email can only used once, after the second try there is no push notification. is there sonething wrong in my esp32 code?

[@uploadideaswithitamar]

Maybe they have new version of Blynk. Read the notification command details

[@yassirhicham229]

Very good my friend i love this stufs don't stop brother.

[@uploadideaswithitamar]

Thanks, will do!

[@muara0893]

Can three mq135 sensors be used for esp32?

[@uploadideaswithitamar]

Yes

[@seadhadziabdic-n3o]

Mq135 are on 5 V.
You use 3.3 V.
Is it correct?

[@uploadideaswithitamar]

It’s on ESP32

[@primeedits5650]

Brother can we do this project with the help of ESP8266 ??

[@uploadideaswithitamar]

Yes

[@primeedits5650]

Does the program differ ??

[@yosraabdouli6509]

why you choose the threshold 300

[@uploadideaswithitamar]

You can choose another one it’s the best for me

[@andrestorres8468]

Can we put a dht11 sensor to this circuit?

[@uploadideaswithitamar]

Yes

[@hamsahamsa6091]

@@uploadideaswithitamar if we connect both dht11 and MQ135 sensors simultaneously will the display show both levels from the sensor is it possible. and just give me a basic idea on how to write the code . please reply immediately day after tomorrow is my project review

[@nico_01]

can i use esp 8266?

[@uploadideaswithitamar]

Yes

[@clintjakealfante3101]

How do I make the device online? My blynk device is offline after creating it.

[@jhonmachado3228]

Greetings.
I have a problem with the configuration of the mq135. it gives me PPM readings too high in an environment with good air quality.
it has a 1k resistor to regulate the voltage going into pin 34.

[@uploadideaswithitamar]

Why did you connect this 1K ?

[@DIPTO-14-8]

class LiquidCrystal_I2C' has no member named 'init'
i have this error,please help

[@uploadideaswithitamar]

Write begin

[@DIPTO-14-8]

@@uploadideaswithitamar thank you sir, i made a project just like you,fully same to same and it is working properly, thank you sooo much sir💝💝💝💝

[@nico_01]

what and where did you write it?

[@nico_01]

i just bought my mq-135, do i need to burn in for 24 hours?

[@uploadideaswithitamar]

For better precision you can wait 24 hours. Just leave it On

[@seadhadziabdic-n3o]

mq135 have supply 5 V.
Why you use 3.3 V

[@uploadideaswithitamar]

This is ESP32

[@noyalroy1099]

Bro total prize of components

[@jasonwu6221]

it doesn't work,the data can not display in blynk and i2c board, it always show 0

[@uploadideaswithitamar]

Sorry, man!

[@jasonwu6221]

​@@uploadideaswithitamar Is your phone's wifi the same as esp32's?

[@domingoalutaya4957]

Hello bro, can i change MQ135 to MQ-2?

[@uploadideaswithitamar]

Yes, you can

[@domingoalutaya4957]

​@@uploadideaswithitamarit's still the same, nothing will change in coding?

[@kiel9303]

I tried this but it's not working 😢

[@uploadideaswithitamar]

What are you doing wrong ?

[@umarfaruqabdullah4118]

how can i get the circuit diagram

[@uploadideaswithitamar]

😆

[@umarfaruqabdullah4118]

I can't?

[@adarshgaurav7292]

Why blnkt not working plesse give me code or template

[@uploadideaswithitamar]

Did you get the code in the description?

[@Frixedwardrempillo]

Send code.

[@uploadideaswithitamar]

Find it in the description