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Topic: how to use max30105 to detect smoke (Read 282 times) previous topic - next topic

raziyedastgheib

 i have recently bought max30105 and i wanted to use it in a smoke detection project can any one help me with coding _the problem is   most of the codes on the INTERNET are about heart rate and so on and none of them are about detecting smoke any link or article that helps me ? to write a correct algorithm to detect smoke particle

Idahowalker

Using a internet search engine, I entered the words "max30105 smoke detector code." I got a listing and clicked on this link: https://www.14core.com/wiring-the-max30150-particle-smoke-detection-sensor/ just to see what's up and wa-la code for the Arduino. And even got tings like the SparkFun_MAX3010x_Sensor_Library https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library/blob/master/src/MAX30105.h

*shrug*

jremington

#2
Mar 22, 2019, 05:47 pm Last Edit: Mar 22, 2019, 05:51 pm by jremington
Quote
to write a correct algorithm to detect smoke particle
That would depend very strongly on your definition of a "smoke particle".

If you do a bit of research, you will find that smoke particles depend on what produces the smoke, how the smoke travels through the air, and that the variety in particle size, shape, density, color, etc. is quite amazing.

Of course, once you have decided on an algorithm, you will need to relate that to the light scattering detected, by experimenting with the sensor in the presence of the sort of smoke that you want to detect.

raziyedastgheib

for example paper or wood then how to code arduino+max 30105 detect smoke?

jremington

#4
Mar 22, 2019, 06:59 pm Last Edit: Mar 22, 2019, 07:02 pm by jremington
First, use the code linked in reply #1 to learn how the sensor responds to the smoke of interest to you.

Then, write code to detect that response.

Did you think this would be a simple cut and paste operation?

raziyedastgheib

sure I did i run the two example in the library but i just could the raw out put of green red and ir leds tha change but i culdnot still figure out the changes when i made smoke near it i also know that smoke reflect  infrared  (the image attached)

jremington

#6
Mar 22, 2019, 10:07 pm Last Edit: Mar 23, 2019, 12:10 am by jremington
Smoke particles scatter light of all wavelengths, depending on their size, density and composition.

You will need to do a number of careful experiments in order to determine the nature of the effect that you need to detect.

You might find this article (and especially the reader comments) to be of interest.

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