PM10 is showing 0

[choudharyanil244]

I am using Arduino Uno R3 and Standard version of Honeywell HPM115S0-XXX sensor for measuring the PM2.5 and PM10 in air. I used example code of AutoSend to test. PM2.5 is working properly as i used incense stick smoke to check but PM10 is constant at 0. I have attached the image at reading PM2.5 and PM10, Having PM2.5 at max 1000 but still PM10 is not showing anything. What can i do to make it correct. Is something wrong with sensor or anything in the library. I have 3 sensor all 3 sensor giving me the same results. Anybody has check this library with PM10. Please let me know if anywhere i am wrong.

[choudharyanil244]

I think this library is not made for standard version. Its using Compact version. I have seen PM10 data is from DATA2_H and DATA2_L. Maybe i will change it in future and make it available.

[jedp]

Ah yes. I'm using the Compact. I seem only to have really documented this by calling the source files HPMA115_Compact.cpp etc. I also tucked this comment into main.c:

// Remember that there are two varieties of the Honeywell HPM115:
// A "standard" and a "compact". They return different auto-read data messages.
HPMA115_Compact hpm = HPMA115_Compact();

Yes, the two units are quite different.

I don't have the standard module, but I'm tempted to get one now that I know there's demand!

As things stand, I won't be able to properly support this without help from someone who has the module ... like you! :) If you have the time and would like to collaborate, I'd be happy to do so.