 So, why did I focus on air pollution? Well, it's a big contributor to ill health in the UK and around the world. I was really surprised by this number. 10,000 deaths in London are attributed to poor air quality. And you might think of an image like this of Thicc Smoog, but in a lot of cases you can't see the pollution and it's still damaging to your health. So, there have been many companies that started looking into this on a large scale. So, for instance, looking at how the air quality in London as a city varies. That doesn't really tell you about your own exposure. So, my project aims to make... My project aims to provide data that's more personalised so you can get an idea of, say, when you're walking to work what kind of pollutants you're being influenced by, really. In addition, I'm trying to make a device that's lightweight and affordable because a lot of the options at the moment are very high in cost, even just for monitoring the pollutants in your home. So, yeah. So, what am I using to do this? I've got a little device down here. I'll show you what it's made up with in a minute, but it's just a few little bits and pieces. I've got the two sensors. I've got a PMS5003, which is measuring particulates, and then the BME, which is just for temperature, humidity, and pressure readings. So, here's the hardware. It's all based around the Raspberry Pi Zero, which is a low-cost board, and it's just using a Python programme to collect data from the two sensors and then transfer this over cellular using the Hologram Nova stick, which is there. It came to about £60. I've got a hackster right up on all the hardware, but that doesn't include the Home Assistant integration just yet. So, this is the IoT integration. So, the data is collected. It's then transmitted over 3G to the Hologram Cloud, and then I'm performing a REST API query from Home Assistant running in my house at home, and then that's collecting the data and means I can view it in my Home Assistant instance anywhere in the world. So, this is how I currently have it set up in Home Assistant with one of these nice cards. I can see all the different readings pretty clearly. I've got PM1, 2.5, and 10, which is the up to 10 micron pollutants for particulate levels, and in order to do this, I had to write a custom component for Home Assistant, and this is just a small Python script that allows you to integrate additional functionality. Can I carry on for a bit? So, I've done some analytics with the data so far. No, I have to stop. Okay. So, I've done some analytics. Unfortunately, I've run out of time, but on behalf of this talk about it with anyone, if you're interested, just a few graphs showing some changes to the air quality, and again, notifications on my phone, and in the future, I hope to make a graph so that I can see different pollutants around a city, say, when you're walking to work and do a predictive model.