0

Setup Info:

MQ135 + Arduino+16x2LCD+ESP8266+ThinkSpeak.

Hi All, I have just bought a MQ135 . I started arduino basics with LED blinking , interfacing and then started with my real project. e I have seen in the data sheet of MQ135 that it can measure Ammonia, Sulfide,CO2 and Benze steam. It can also be used to detect smoke and alert.

But in the Arduino uno Serial monitor, I can see only one value 408.

Now, I dont know how to differentiate it in all different values of required gases and trigger smoke alarm

Also, my friend suggested to calibrate this sensor for which I found really good material and started with 24 Hours on test after dumping a code to read data from it. Now I read 1836 which was 1795 , about half an hour back.

Kindly reply and let me know what info or input is required from My side. This is my first of my many uno projects to come.

Regards, Sillicon https://forum.arduino.cc/index.php?topic=535401.msg3649205#msg3649205

  • you already posted at forum.arduino.cc .... why are you posting again here? ..... you have not asked a specific question. – jsotola Mar 15 '18 at 22:29
  • Yup, I intend to notify the same and look for unique solution to solve this problem – Sachin Attri Mar 15 '18 at 23:11
1

Now, I dont know how to differentiate it in all different values of required gases and trigger smoke alarm

This sensor does not differentiate between the various gases that it is sensitive to.

  • I dont recollect but I have seen coders showing off different values of CO2 , Ammonia on a 16X2 screen using MQ135. – Sachin Attri Mar 15 '18 at 23:13
  • If you’ve seen it, show it. – jose can u c Mar 16 '18 at 3:07
  • youtube.com/watch?v=GT8dNNRWNOY Visit this please – Sachin Attri Mar 18 '18 at 8:04
  • I watched the video. The fact that values are displayed for different gases does not mean the values displayed are accurate. There are values shown for "Smoke" and for CO when it's clear nothing is being burned/combusted. – jose can u c Mar 19 '18 at 1:18

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.