Help please with Co2 project

[chillintau]

Saw your post on the jobs board. You could try something like this: http://www.co2meter.com/products/k-30-co2-sensor-module

It would give an analog output that you could read with your Arduino.

[fallendemon]

Yes I am still looking for a solution. The problem with the K-30 sensor is that the default sensor OEM unit is maintenance free in normal environments thanks to the built‐in self‐correcting ABC algorithm (Automatic Baseline Correction). This algorithm constantly keeps track of the sensor’s lowest reading over a 7,5 days interval and
slowly corrects for any long‐term drift detected as compared to the expected fresh air value of 400 ppm CO2."
This means it would work fine for measuring the CO2 in a house, office, etc that are open to the outside air as it assumes the average value is 400 ppm. Using it in an elevated CO2 area the sensor's output will slowly move to 400 ppm due to its internal algorithms.

[fallendemon]

Anyone willing to assist me?

[Franklin97355]

Anyone willing to assist me?

I'm sorry, what have we been doing so far?

[fallendemon]

I am offering to pay money to someone to write a code for me and draw a diagram of how to wire everything in Fritzing.

[Franklin97355]

That's what the jobs board is for and apparently you have already posted there.

[timv1]

I can help you with this. I have a grow room (veggies not pot) in which I inject c02 and keep it at a specific level.

[fallendemon]

Okay great how should we go about doing this? Do you want my phone number?

[timv1]

I'll tell you what - instead of you paying me, in keeping with the Adafruit way of doing things, I'll give you links to everything it will take to complete your project in case others may want to do the same thing:
co2 regulator I use
http://www.amazon.com/gp/product/B00AAI ... UTF8&psc=1

Link to sensor below. I used the 2000ppm because I keep the grow room at around 1400ppm. The sensor values are zero to the listed value, so with the 2000, I can measure 0-2000ppm. These are the most advanced sensors which is the reason I chose this type.
http://www.co2meter.com/products/cozir- ... 4Aodkl0A6Q

Link to sample code. I also added a clock so no co2 is added when the lights are off since plants won't use it then
http://www.co2meters.com/Documentation/ ... rduino.pdf

more about the sensor:
http://www.co2meters.com/Documentation/ ... nt-CO2.pdf
http://www.airtest.com/support/datasheet/COZIR-A.pdf

important note about not using switching power supply:
http://co2meters.com/Documentation/AppN ... ration.pdf

If you insist on using the sensor you mentioned and whatever other hardware you have, perhaps you can use some of this information for your application.

Good luck.

[fallendemon]

Well thank you very much. It is very helpful. Only remaining question I have is how to go about wiring in an LCD and getting it to do what my temperature controller does with two push buttons for adjusting the desired ppm level. For this I am willing to pay you. I would need a Fritzing diagram as well as the code. I know some of you guys can do it blindfolded but for me it's not so easy.

[timv1]

Here's a link for the LCD:
http://arduino.cc/en/Tutorial/LiquidCrystal.

I'd recommend a small potentiometer like the ones:
http://www.digikey.com/product-search/e ... ageSize=25
since it would be easier to adjust a range. With switches you could make one do hundreds and the other tens I suppose, with a first push indicating to begin setting and a long pause indicating accept.

If that's still not enough let me know. Post your email address and I'll email you. I'll let you know after I have it and you can delete the post containing it so you don't get spammed.

[fallendemon]

Well could you make a Fritzing diagram for me and email it to me with the code? I was thinking of just having the buttons increase and decrease the ppm value by 10. My email is t*********@gmail.com

[timv1]

Just so everyone knows, I deleted my other response so he could delete his response which apparently isn't possible if there is a subsequent response present. I see that either he or Adafruit edited it so his email no longer shows - that's good. I've contacted him and hope to work with him.

[maltesemants]

I use a CO2 sensor for a similar application.
It has a simple 4-20 mA current output to control any relay.
Range: 0-5000 PPM Carbon Dioxide
Repeatability: +/-1%
Accuracy: +/- 2%

How can I get your email?

thanks, Thomas

[timv1]

Thomas (maltesemanTS), you and the other fella are right about the advantage of adding CO2 to a grow room. I built one a while back where I am able to grow vegetables year round. Here's a video showing the construction: https://www.youtube.com/watch?v=7MVYJ-XF9cA. I added CO2 and keep the level around 1450ppm and have great results. I still had some things just breadboarded in the video but have since cleaned it all up and it's working great. I didn't incorporate the arduino but did use an atmel chip to control everything. What I eat consists mostly of meat and veggies so the grow room is a pretty nice thing to have. A lot of the produce these days (even that marked organic) is genetically modified (GMO) so I prefer to grow my own and do so organically and in soil. Good luck with your growing!