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DHT11 is what I used but the DHT22 is more accurate if they have those. Should work just the same.

Hey man, what ph sensor are you using? I found some but there are liek $110 total. http://www.atlas-scientific.com/product_pages/components/usb-iso.html http://www.atlas-scientific.com/product_pages/probes/ph_probe.html

Also I love the graphs, would love to get at that thing once you are done. looks so neat.

Hey man, I made a Pi tutorial with a Humidity sensor + relay. You could easily use the sensor and connect to a better relay to power a fan to control the humidity. https://www.rollitup.org/t/diy-raspberry-pi-dht11-sensor-sainsmart-2-channel-relay.923374/

DIY the LED if you want, just make sure it draws 400w at least from the wall when you are done. If you have the background it shouldn't be to hard to wire. Lots of places sell DIY kits that you wire/assemble. I figured heat wouldn't be too much of an issues cause you are in Canada, but im not...

Heya, $500CAD will definitely be enough to achieve your goal. From reading your post I can't tell if your $500 budget included the grow chamber or not. If you haven't already bought the wardrobe think about a grow tent. One big enough for two lights( flower | veg/clone) for less than $150. I'd...

I put the sensor in a tupperware container with a wet paper towel and put it in the sun. Fan kicked on and turn off when I took it out so I know it works. Now im trying to figure out the best way to make a drying chamber.

whats the cavicide used for?

Hemp virus IMO. " Effects The hemp mosaic virus infects plants of the Cannabis genus. The virus causes cellular mutations, stunted growth, damages plants photosynthesis ability, and more. Cellular mutations usually manifest as discoloration and misshapen leaves. Discoloration usually manifests...

https://www.rollitup.org/t/diy-raspberry-pi-dht11-sensor-sainsmart-2-channel-relay.923374/

--Saved for pictures--

Hey man, did a write up on a box i'm working on. It should get you almost there. https://www.rollitup.org/t/diy-raspberry-pi-dht11-sensor-sainsmart-2-channel-relay.923374/

Hey everyone! I saw a post awhile back about a curing box using a sensor and fan. Getting bud to a good RH before curing is always my weakest link so I decided to start a fun little project. Tweaking the tutorial a bit you could use the relay for turning on/off anything basically. Warning: I'm...

I'd brew some tea if you notice any sludge.

Got the sensor working with the fan where should I make a post. Is there a subform for tech or DIYs?

2.3 is way to high. Roots use osmosis to take in water and nutes. if the solution is too salty for the plant(high EC) it actually dehydrates the plant cause the roots to soft causing rot. Also h2o will not help if it is root rot. h2o for increasing dissolved oxygen and nothing else.

^ Been saying this since day one. why add all these chemicals that do nothing when you can dose with tea and run full synthetic. never worried about temps or WATER CHILLERS?? LOL.

Alright man, worked on it late so couldn't post till this morning. Here is what I got so far. I linked the DHT11 sensor I got from MicroCenter to the RaspPi using a bit of modified code from uugear. http://www.uugear.com/portfolio/dht11-humidity-temperature-sensor-module/ Worked almost right...

Okay, I'll post some shots tomorrow. Not much to look just yet but I would be nice to track the project.

thanks bro