Weirdly coincidental timing on this! I've been working on a PCB design (FeatherWing form factor) to track weather data on my hikes, making use of a BME280 and a GPS module. First revision of the board[1], I discovered that the sensors started out accurate, then drifted up to a steady 3° above ambient. Probably because the GPS module was heating up. So last night I found myself reading up on design considerations for temperature sensors [2], including specific things like the cutout you have on the left side of this board.<p>I'm guessing you designed this — any advice as I embark on designing a second revision of my hiking log?<p>[1] <a href="https://twitter.com/josecastillo/status/1134128199972130816" rel="nofollow">https://twitter.com/josecastillo/status/1134128199972130816</a>
[2] <a href="http://www.ti.com/lit/an/snoa967a/snoa967a.pdf" rel="nofollow">http://www.ti.com/lit/an/snoa967a/snoa967a.pdf</a>
This looks great. I've been waiting for a nice, hackable, cheap set of environmental sensors!<p>There's only one "improvement" I would like to see - an option to buy a cheaper version without a display attached. For my application I will not need any display, and it seems a shame to spend resources on one when it's only going to get destroyed by the elements :)
By an incredible coincidence, I am putting together something to do exactly what this does. One exception: I am including a CO2 sensor to monitor and collect atmospheric CO2 levels.<p>I'm guessing a there is enough I/O left on a Pi 0w such that a CO2 sensor can be added to the Enviro+?
I'm working on a similar nodemcu based system that was originally proposed by Bruh Automation <a href="https://www.youtube.com/watch?v=jpjfVc-9IrQ" rel="nofollow">https://www.youtube.com/watch?v=jpjfVc-9IrQ</a> later updated by digiblurDIY <a href="https://www.youtube.com/watch?v=9Yu57vjz7AY" rel="nofollow">https://www.youtube.com/watch?v=9Yu57vjz7AY</a> to use ESPhome <a href="https://esphome.io/" rel="nofollow">https://esphome.io/</a> with no progamming.<p>This looks interesting, but somehow it always seems wasteful to use full blown Linux servers for this stuff, so I'm dabbling in something smaller. :)
I love Pimoroni Modules, having used the MicroDot pHAT, Unicorn boards, Touch pHAT, (and several more). The only problem I have is that the libraries aren’t particularly well written. Of course they’re open source and I would like to improve them, but as far as I know there are no schematics available.<p>Example being, the Touch pHAT (very good board btw) doesn’t use interrupts and library is sorta messy. I still use it though, because it’s not a big deal — however it’d be nice to be able to take full advantage of the components used in the boards. I guess my rant is mostly about not having access to some schematics of the products.
By coincidence I actually need this -- going to be doing some data analysis on indoor hydroponics grow rooms and this would give me all the environmental data I need if you include the particulate matter sensor.
This is pretty cool. I’ve been looking to expand / replace PurpleAir with something that monitored gasses in addition to particulate matter.<p>I don’t think this is exactly what I want, since it has an LCD, but the sensors and board are really cool.<p>The only thing I wish this tracked was SO2.<p>I’m thinking i might have to make my own with Arduino. But this is very cool.
I wonder how easy it would be to convert, or design something similar to the Enviro+ that is in a waterproof enclosure with battery. Could be useful for collecting data on some basic water quality(turbidity,conductivity,pH,temp) alongside water level.<p>We currently use In-situ Aqua Trolls[1] to gather these parameters, but a solution like this could almost be considered disposable; hand them out to people in remote areas and you could potentially realise data for rivers/creeks that rarely flow, and would otherwise go unmonitored due to the time and finial investment required.<p>Very interesting project, thanks for sharing!<p>[1]<a href="https://in-situ.com/products/water-level-monitoring/aqua-troll-200-data-logger/" rel="nofollow">https://in-situ.com/products/water-level-monitoring/aqua-tro...</a>
I was looking into some hobby sensors for home recently and came across this the Ruuvi [1]. I prefer this model to having on-board sensors. This doesn't do everything the Enviro+ does, but for a lot of use-cases it's pretty nice and affordable.<p>[1] <a href="https://ruuvi.com/personal/" rel="nofollow">https://ruuvi.com/personal/</a>
Was looking into something like this recently, but apparently a lot of the sensors out there aren't super precise:<p>- <a href="https://www.researchgate.net/publication/325416608_Suitability_of_the_Low-Cost_SDS011_Particle_Sensor_for_Urban_PM-Monitoring" rel="nofollow">https://www.researchgate.net/publication/325416608_Suitabili...</a><p>- <a href="https://www.scientevents.com/proscience/download/potential-and-limitations-of-the-low-cost-sds011-particle-sensor-for-monitoring-urban-air-quality/" rel="nofollow">https://www.scientevents.com/proscience/download/potential-a...</a><p>They are often easy to set up, but make sure to double-check just how much you can use your particular model for.
Are the sensors pre-calibrated? I found that you can easily get cheap air quality sensors from China, the problem is that they could do better with calibration, which may require expensive (in relation to the sensor itself) equipment.
There have been just as comprehensive if not even more comprehensive sensor sets available for a really similar price. It's nothing unique.<p>As building such boards is quite common, I too have assembled many similar boards for my own use, to monitor both indoors and outdoors air quality although I don't have any external stations to compare my values to but they're "calibrated" according to the same baseline across my setup and it allows me to keep an eye on different types of pollution - different gases, particulates, UV, noise and so on. Would be nice if all these platforms could be tied together.
Really looking forward to using this. Our local Council has a few air quality monitors in strategic places and publish the results as open data. However, they are 6 months behind in publishing data and have recently declared a "air quality emergency". They also state "Currently the level of interest in air quality appears to be rising, but this does not
seem to translate into interaction between the Council and the local communities".<p>With an Enviro+ on a portable Pi I'll now be able to get my figures in near real time and ignore the Council.
Very similar to Pioneer600, an expansion board for Raspberry Pi. <a href="https://www.waveshare.com/pioneer600.htm" rel="nofollow">https://www.waveshare.com/pioneer600.htm</a>
I have been using <a href="https://getawair.com/" rel="nofollow">https://getawair.com/</a> (2nd edition) for over 6 months and I can't recommend it enough.
Does anyone know where I can buy one of those displays? Looks amazing for the size and it has a standard connector instead of the weird hot-bar solderable ones on the other small displays I have seen.
Anyone have experience making an enclosure for something like this to use outdoors? Thinking of like a Stephenson screen with a built in solar panel for powering the Pi + Hat.
I'd suggest breaking out this board to decouple it from rpi, since rpi heats up enough to make temperature readings from attached board inaccurate.