MadCO2
Hardware
co2 monitor
SHOW HN2019
146points
120comments
#298of 2,195 in 2019
Top 14%of 2019 by points
How HN took it
CuriousMostly questions and neutral comments
3 positive, 20 neutral or asking, 0 mixed, 12 critical, out of 35 comments about the project. Thread score -0.28.
Performance: 1 for, 4 againstIdea: 1 for, 2 againstDesign: 0 for, 3 againstPricing: 0 for, 1 againstDocs: 0 for, 1 against
The thread, comment by comment
Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.
positive neutral or mixed critical about another commenter or something else the maker
What HN said
What people liked
Useful for improving air quality awareness
From 1 comment
Installed a CO2 monitor in my home two days ago. Already changed my life. It warns me when I need additional ventilation and even beeps if CO2 levels raise too high. It sounds…
maxk42 on HN
Objections
Sensor accuracy is questionable for cheap CO2 meters
From 1 comment
This device's manufacturer claims an accuracy of "± 100ppm or ± 7% of reading". But there's a review on Amazon that describes someone getting three units and finding as much as…
wyldfire on HN
C++ is overkill for a simple web app
From 2 comments
Isn't C++ a bit overkill for a web app?
benbristow on HNArchitecturally speaking this should be a super simple script that pulls the sensor data into a database for any use instead of a custom written http server that manages the…
edoo on HN
Requests
Cheaper CO2 sensor options
From 3 comments
Would you be able to share where you might get such a cheap CO2 sensor/the name of it? I've had trouble finding them for less than £60 in the UK and would like to set one up.
Hobohodo on HNAnyone know other, possibly cheaper, devices besides https://www.co2meter.com/products/co2mini-co2-indoor-air-quality-monitor that can display current CO2? I hoped there would be…
Sujan on HNI'm looking around for an affordable household CO2 measurement tool but they're all wildly expensive. Is this technology complicated and cannot be obtained for $30? They're all…
Waterluvian on HN
Questions
Why are there steps in the CO2 readings
From 1 comment
Why are there steps in the CO2 levels?
jakobegger on HN
Alternatives named
CO2Meter CO2mini
From 2 comments
Anyone know other, possibly cheaper, devices besides https://www.co2meter.com/products/co2mini-co2-indoor-air-quality-monitor that can display current CO2? I hoped there would be…
Sujan on HNThis one on Amazon: https://www.amazon.com/gp/product/B001PDGFR8/ref=ppx_yo_dt_b_asin_title_o01__o00_s01?ie=UTF8&psc=1 Looks like they're out of stock now, but it has a big label…
maxk42 on HN
larsp/co2monitor
From 1 comment
Whats wrong with this one? (it works with the same device) https://github.com/larsp/co2monitor
ody4242 on HN
Awair
From 1 comment
@dhh highly recommends Awair for air quality monitoring. He gave some talk on it after be bought one for his whole staff (can't find the talk for some reason) I got one and it's…
khaki54 on HN