More sensor modes

[Zanop]

Hi, Ive done this for a project of mine(portable PM sensor). I thought you might like it.

[goggel]

I've tested this branch and it's working quite well. The working period seems to more or less solve the issue with sending the esp to deep sleep and waking up the sensor while doing so. The timing on the sds seems to be rather irregular, because while sending the esp to sleep for 5 minutes the sensor needs between 10 to 20 additional seconds the get the result.
A few comments on the code it's self:

• mode_dsleep/mode_mon_300/mode_mon_60 should be one method allowing you the set the working period (needs calculation of the checksum, which should not be a big problem)
• the mode* methods do completely different things and are quite confusion. Would propose something like setWorkingPeriod and reportAfterQuery/reportActive
• If setting the sensor to mode_query a active query should be send when calling read
• I'm always getting a timeout for the first sensor read. It's quite confusing for a user.
• The documentation should be extended, because without reading the "Laser Dust Sensor Control Protocol" the different working modes and working periods are quite confusing and even worse some of the settings are persisted and setting the working mode to query is seemingly "bricking" the sensor

I'm working on addressing these issues and will create a different PR.
Any details an your sensor box?

[Zanop]

Hi, meanwhile I've added some more, namely query function to actively query in query mode. I've noticed that in working period/active mode the sensor still consumes quite a lot of power even when waiting. Forcibly putting it to sleep and then waking it consumes a lot less power.
As for mode_dsleep/mode_mon_300/mode_mon_60 methods, I started this way with the idea to only do a few mods but things progressed quite a lot ;)

[Zanop]

The sensor box is just a lunch box I found in the shop. I think its this one https://www.rothoshop.de/Kueche/Premiumdose-LOFT-0-5-l.html
The sensor fits perfectly on the bottom.

[ssz157]

Hi There,
I m using SDS011 and CO2 sensor with Arduino mega. The only issue I have is that I cant get the SDS011 to sleep mode. It keeps on streaming all time. I need it to wake up for 30 secs and then again wake up after 5 mins.
Can anyone please help as I'm totally new to programming.

[Mogway28]

Could You write example for query mode. I cannot get it work.