Edited Dec, 2020 SDS011 support via it’s USB adaptor is now supported through an emonHub interfacer, not a part of the standard image. . emonhub/src/interfacers/EmonHubSDS011Interfacer.py at master · openenergymonitor/emonhub · GitHub Original post retained below. Building upon the work of @dan…

On the Home Assistant theme, there is also an HA component for this device Serial Particulate Matter - Home Assistant .

Another integration here: dusty-bridge.php.zip (1.5 KB) It’s been designed for LuftDaten.info project firmware, and can be places at emoncms device homepage root, along-side index.php. The luftdaten firmware I can recommend because it easily integrates with two widely accessible PM data world maps…

How often are you reading the air quality? The datasheet says these have a 8000hr service life, which is just 333 days if running full-time, although a 1Hz reading is a bit OTT so are you just spinning it up once every minute or so? I read somewhere that it needs to spin up 30secs for a good readin…

Some interesting reading about the SDS011 (and a few other PM sensors) and calibration. [image] Evaluation of Low-Cost Sensors for Ambient PM2.5 Monitoring Low-cost sensors are an opportunity to improve the spatial and temporal resolution of particulate matter data. However, such sensors…

[image] pb66: The datasheet says these have a 8000hr service life, up to 8000 hours, so maybe less. That’d be a bummer if it turned out to be significantly less. :frowning_face: Further driving up the cost, as you mentioned above. [image]

To add to the sites that have code for connecting these, here’s one where the guy used an ESP32 → Working on my IoT air quality monitoring setup - DEV Community Given I’ve already got code for an ESP8266 for reading DS18B20 temperatures and sending them to my emoncms server and MQTT, I’ll replace t…

@Bill.Thomson that’s a good bit of research, I’ve seen it before and had forgotten about the humidity factor. I think the most important aspect of accuracy of these devices is to do with humidity. Humidity should ideally be read in parallel with PM count, and the count should be adjusted in softwa…

Interesting that’s pretty low! I wasn’t aware of that. We’re currently taking a reading every 10’s but the sensor fan is running continuously. I’ll look at adapting the code to power down / spin down the sensor in between readings and maybe reduce to once per 60s? Or even slower

[image] glyn.hudson: We’re currently taking a reading every 10’s How often does it change - is there much jitter? If you looked at the trend, it would help you assess how often to sample. Perhaps the average of a burst of 3-5 samples every 10 min would work.

A good indicator (for indoors) would be Building Regulations - how many air changes per hour for a given room and usage does that call for?

SDS011 PM2.5 / PM10 Air Quality Particulate Sensor with Emoncms / emonPi

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Bill.Thomson (Bill Thomson) 29 January 2020 23:15 5

Some interesting reading about the SDS011 (and a few other PM sensors) and calibration.