Wow! Cape Town, is on another @#$% level.
Great video clip chaps, exactly what I visualized several months ago, any chance you could do a whole session?
By the way, can we please install one of the first completed sensors outside this childrens nursery?
The reason I ask is, that during the summer I see children between the ages of 2-5 playing in the front forecourt of this building. which is located on Portway (100m from Lidl), which is a busy artery for all groups of vehicles (especially of the articulated type).
Lastly, maybe in the interim period (only defence for now) we could recommend one of these for any anxious parents out there.
Cool glad you like the PR… we’re still at early prototype stage and it needs a few more weeks for will to get it working right. Next bit is the housing unit and getting council buy in. That is key as that will dictate where we can put the sensors in around street furniture (if not at someone’s house)
Slight side:
One of thre makers of a consumer air quality sensor (as well as making air purifiers etc.) have an app with local statuses/alerts for their network:
(their sensors cost a lot more than what we’re planning though)
Good example for us to aim for in our user interface – traffic light colours, happy/sad faces …
Yes agree this is perfect. We can start designing our interface soon and this seems like a good reference
As emojis are nonverbal cues and a world language, why not keep it simple?
I found a few things that might be ‘pants’ or useful perhaps?
Interesting to see their is a variance of WHO standards vs what the EU and US actually allow
I spoke to MakeShed and they are really interested in a cross-collobatration with air quality sensor to help building of housing units either on same day or as a drip drip…
Also Johannas, was really excited at the idea of us rigging up more air sensors around Welsh Mill Hub. He has declared a climate emergency at Edventure so this would fit in really well. Was thinking we could create sole dashboard or display that tracks quality over the week. ESP tempature! Lol. He’s happy for us to buy more sensors to achieve this.
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Dunno if this takes the fun out of it but you seen this @Will ?
see you have to get this with it - https://shop.pimoroni.com/products/pms5003-particulate-matter-sensor-with-cable
Also
I’ve started the deck to begin to look at interfaces… Feel free to add too
Nice - the Pimoroni board has a decent range of sensors, but is designed for use with a Raspberry Pi. Cheapest WFi enabled model (Pi Zero W?) is about £15 (from memory), so we’d be looking at north of £60 per device.
Don’t get me wrong the board’s good value for all the bits that are on it (might still be good for a learning device since it has the display built in), but I think we’re still aiming for <£40 per unit.
(minimal build - based on AliExpress pricing)
£2 Microcontroller (esp8266)
£2.50 Temperature and humidity ( dht22)
£14 PM/dust sensor (sds011)
So call that £20, plus allowance for:
- Box/enclosure
- Wires/soldering etc.
- Power supply/cable
- Tubing (to attach too dust sensor input)
Righto, good to know. Just wanted to sense check. I guess we can add more sensors if we need. On the doc I linked to I found the common sensors as
- Nitrogen Dioxide
- Sulphur Dioxide
- Ozone
- Particles < 2.5µm (PM2.5)
- Particles < 10µm (PM10)
Interesting read on how air sensors are taking off in the states- https://www.wired.com/story/cheap-portable-sensors-are-democratizing-air-quality-data/
Also in Barcelona
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That looks nicely put together (solar charging, neat sockets etc.) but it does show a bit in the price given there aren’t any sensors in the base package, but it looks pretty tidy and flexible
- would need a different case for air sensors etc. and/or holes in that one
- it did make me think back to plans I had for low powered bluetooth sensor clusters around a hub (trade-off with fewer wires/holes in enclosures, but more things to power/recharge…) - the a solar hub could be pretty weather-proof, without wires and tubes through the casing…
BTW, just noticed this on Air Apparent’s twitter page:
This would be my sensor of choice! https://www.nathab.com/blog/dog-detectives-sniff-out-water-pollution/
Some follow-up info from Air Apparent following the air sensor workshop, including links to Luftdaten’s map, charts, and data archive as CSVs and via a REST API:
Viewing the map, charts and raw data
Map:
Once your sensor has been added to the map (instructions above), you can view it on the interactive world map at:
http://united-kingdom.maps.luftdaten.info/
It defaults to showing PM10, but you can change it to PM2.5 using the on-screen menu (what are PM10 and PM2.5?). Your sensor produces a reading for both types, but the PM2.5 reading is more accurate. You can click on a hexagon on the map to see the current values for each sensor within it. Each sensor can also be expanded to show a graph of the PM2.5 and PM10 levels over the last 24 hours.
Charts:
If you want a better view of the charts, covering a longer period, there is another service which provides that. Just substitute “YOURSENSORID” with your sensor’s ID number in the URL below:
https://www.madavi.de/sensor/graph.php?sensor=esp8266-YOURSENSORID-sds011
The page above shows the data from the SDS011 sensor, i.e. it shows PM2.5 and PM10. If you want to view the temperature and humidity data, take a look at:
https://www.madavi.de/sensor/graph.php?sensor=esp8266-YOURSENSORID-dht
Raw data (advanced users):
The raw data can be accessed as CSV files here once you are on the map:
https://archive.luftdaten.info
Open the directory for the date you are interested in. The number of the sensor is different from your Sensor ID above. It can be found by clicking on your sensor on the luftdaten map and reading the sensor ID (typically 5 digits) from the panel on the right or by logging in to my.luftdaten.info and finding the number next to your sensor.
There is also a REST API here which may be of use to those developing websites or mobile apps:
This is great @Al_B & @Will do we think we are in a position to but say enough kit for say 10 air quality sensors?
Ok i’ve started the great buy-athon… After 7 orders I got flagged up on aliexpress anti fraud thingy… I’ve sent documents over to get ‘verified’ which should mean I can continue rest of orders shortly…
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