IOT air quality sensor with a raspberry pi and an sds011. That uses MQTT for data transmission and can report PM 2.5 and 10.

@AndreC looks like industrial grade device.
Waiting for exactly the same Nova PM sensor to be delivered.
How does that one behave in terms of precision depending on outside temperature and humidity?
Any details/tips on connecting to apart from ?

@debugger @AndreC I recommend building this and contributing to sensor.community

sensor.community/en/sensors/ai

I have a sensor running on my balcony for a couple of years now. Zero maintenance, and the default firmware supports several interfaces (influxdb, mqtt, etc)

@signaleleven @debugger WOW that looks like an incredible project! Much better than the hacky code I have definitely should of done that of I was to build another.

@AndreC @debugger building something from scratch (or from libraries) is still a nice experience. But for production deployment of a sensor, I'd go for that 😊

@signaleleven @debugger Yes definitely, I hardly care if mine is accurate or stable as it's only job is to detect when I start my fireplace and turn on an air filter. I am actually looking to build some leak/water detectors so I'll definitely want to see if there's any premade ones if there isn't I would definitely contribute my own design.

@AndreC @debugger have you seen home-assistant.io?
Once you invest in a centralized, self hosted home automation software, all those projects will share the same event bus and backend. Like, regardless of what sensor I end up using, I look first if it's something I can do with an ESP and esphome.io because that's the most natural way to integrate it with home assistant.

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@signaleleven @debugger All of my stuff is actually hooked up to Home Assistant and it's apsolutely incredible! Sometimes when I'm using it I just cant believe it's all free. I care about security so none of my devices talk to the cloud. Most of my devices are ESP's running either Tasmota or open MQTT gateway, I haven't looked into ESP home yet.

@AndreC @signaleleven speaking about security, have you considered using over CoAPs? It's quite heavy comparing to MQTT, but provides more security options.
We use it in production for railway industry.

@debugger @AndreC While I do use MQTT for a couple of things, it's internal to my network.
But I will check that out because I never heard of either (LmM2M and CoAP, although it smells like LoRa..)

@debugger @AndreC wow, it does add a provisioning layer on top of the message exchange. Interesting. Most of my stuff has hardcoded credentials, we're talking about a handful of home sensors. But for bigger deployments, I'd definitely consider that. Cool.

@signaleleven @debugger Yes definitely if your running industrial level IOT device's looks like this is a must! For smaller deployments im sure mqtt is fine and very easy to get your head around.

@debugger @signaleleven No I have never heard of it but it sounds very interesting. The main reason I use MQTT over another protocol is simplicity, it's very easy to understand plus you can segregate it to its own network and just have the broker talk to your HA instance. Also security isn't really an issue as I'm the only person on my network and I don't care about people seeing data being transferred.

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