Reddit reviews CO2Meter RAD-0301 Mini CO2 Monitor, White

It's sold by Amazon, not a 3rd party... so I don't think it is. Unless whoever Amazon buys it from is promoting it, which I doubt.

ref= in amazon links just tells amazon which button the user clicked. tag= is what is used for the amazon affiliate program (examples).

/u/Akira_Yamamoto could have removed everything after /dp/B00H7HFINS/ and the link would still work.

• https://www.amazon.ca/CO2Meter-RAD-0301-Mini-Monitor-White/dp/B00H7HFINS/

I got a c02 mini desktop usb sensor on amazon, actually works with linux! only about $60! I have not used it yet but in testing it has worked great.

Edit Link: https://www.amazon.com/gp/product/B00H7HFINS/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

Don't how cheap you are going but this is the one I bought and it's worked steady for 2 years so far. https://www.amazon.com/CO2Meter-RAD-0301-Mini-Monitor-White/dp/B00H7HFINS/ref=sr_1_4?ie=UTF8&qid=1520996795&sr=8-4&keywords=desktop+co2+meter

So I learned a long along the way. The graphs and stuff was the easy part!

Originally I wanted to wire up my own sensor so I picked up a breadboard, a dht22 sensor, some jumpers to wire it up, and a ribbon cable / adapter to connect the breadboard.

The basic guide for that can be followed from this tutorial here:

https://www.raspberryweather.com/wiring-for-dht22/


However, in my search for a co2 sensor to add to my breadboard, a fellow redditor pointed out a low cost usb sensor that includes temp and co2! The hackaday project seems to mention one that also does humidity along with it, but it appears to be over twice as expensive on their site ($200!). So decide if you want humidity. It's an important stat, but you can get it with the dht22 if you go that route.

The usb co2 sensor and hackaday links are here:
https://hackaday.io/project/5301/logs

https://www.amazon.com/CO2Meter-RAD-0301-Mini-Monitor-White/dp/B00H7HFINS

Ok, so now all the sensors are up, you need code that reads the sensors and outputs json. I put these together based on the samples from dht22, and the hackaday project. I can post these if you need them.

Ok, next step. This is overkill I suppose for what we are doing, because it's designed to be super scalable. Anyway, I have a server running influxdb (open source, free) and it runs a time series database. I would not recommend saving the influxdb database onto a sd card. Either put it on a server that is always running, or get a second raspberry pi, and attach a usb harddrive, and write to the harddrive. USB speeds are slow, but sd card writes are atroicious, and sometimes kill cards

Then on the raspberry pi, which is connected via wifi, I run a client called telegraf which will run the scripts that parse the sensor data and output json. Telegraf sends the sensor data to influxdb where it is stored very effeciently.

Here are the links for graphing side of things:
https://docs.influxdata.com/influxdb/v1.2/introduction/installation/
https://docs.influxdata.com/telegraf/v1.2/introduction/getting_started/

Ok so now we have all of our data in the database, the last step is presentation. There's a "standard" opensource tool for this too, again, because this software is used by major players in the tech industry, we can leverage their work.

A project called grafana is my dashboard tool. I run this on my server and it allows me to point it at influxdb, and design queries to create graphs and dashboards. grafana installation info is here:

http://docs.grafana.org/installation/

http://docs.grafana.org/guides/gettingstarted/


Sorry this is getting long....

I also installed the raspberry pi camera, so that I can run timelapses. Originally this was simply a timelapse, but once I had influxdb running I had to take it a step further!

Now I added a couple steps to my timelapse script. Between each picture, I ran a script that queries influxdb to get the json data out of it, then runs a ruby script to create a graph based on that json using a gem called gruff, then superimposing that on the source images so when my timelapse was created later it had the environmental data.

It's still a work in progress (no co2 yet) but here's a recent one I made to show off the floodtrays / irrigation timers I got going this weekend:

https://www.instagram.com/p/BQKAUu7DXed/


Anyway, it was . If you want some code dumps from my setup or help with parts lists let me know. The data is all realtime, and the dashboard auto refreshes as data comes in :)

Yes sir.

CO2Meter RAD-0301 Mini CO2 Monitor, White

https://www.amazon.com/dp/B00H7HFINS/ref=cm_sw_r_cp_apa_i_uI0rDb4NME0AN

I got this one from Amazon and I really like it: https://www.amazon.com/gp/product/B00H7HFINS/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1

I hear you. It was $70 on Amazon: https://www.amazon.com/gp/product/B00H7HFINS/ref=ppx_yo_dt_b_asin_title_o03_s00

Even though it's a low-end model it logs data over USB, so I have to hooked up to a raspberry pi feeding data to a graph. It's very handy for knowing empirically how any of my attemtps to lower CO2 actually perform.

$65 https://www.amazon.com/CO2Meter-RAD-0301-Mini-Monitor-White/dp/B00H7HFINS/

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