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I plan on making some sort of calibration interface soon enough to come up with the equation by itself, and gives instructions, but that'll have to wait.

`````````` Available at your local hydroshop. Test it against the probe, use excel or openoffice and plot with the analog value from your arduino vs the expected pH and come up with a formula for the conversion of the analog value to the actual pH. Use the sketch available here...

Yeah, that formula is much more accurate. I'm using a buffered solution @ pH 4 and pH 7 it's available at the hydro store. Make sure your solution is buffered - ie with the pH 4 buffered solution it will go back to 4 even if some acid/base is added

A Very Big Update! Now with login/log out and change settings via web interface! Version 1.14 up now! :cool: Check https://sourceforge.net/projects/envirocontrol/

Parts List: 1x MEGA 2560 (eBay) 1x Raspberry Pi ($35 @ element14) 1x SSD-1963 Touchscreen (eBay) 1x DHT-11 Humidity Sensor (eBay) 1x LM35 Temperature Sensor (eBay) 1x Light Dependent Resistor (eBay) 2x Phidget pH module (robotshop.ca) 2x cheap BNC pH probe (eBay) 1x RSSDN-25A Solid State Relay...

Lol, the only reason I used the LM35 and DHT11 together is because it's cheaper. Plus I just wanted to buy a couple LM35's for use in other projects too. I thought about wireless sockets and then immediately thought I wouldn't want anybody 'accidently' controlling my relays.

I can relate to this; I can code for hours stoned, and even the most complex shit just seems to make sense. There will be a bug, and I'll instantly know what's causing it. Sometimes I wonder how I knew where to look while I'm fixing it - lol.

Yeah, I'll probably give them an extra week though... I think the leaves are helping to absorb some energy needed, because I might have shocked them a little bit into producing by upping the PPM quite a bit. However, you will notice that the biggest plants are the ones closest to the...

OMG Kush: AMS: Whole Setup:

My OMG Kush's have huge leaves like those too... 3 weeks left! Woohoo!

How are you liking the Intel Chip?

Amen Brotha. I wish I had the plumbing in my grow room to hook up some source/drain solenoid valves for auto-refill, then add some dosers/pumps to mix the nutrients, with a recirc pump.... :(

Sorry guys, been working lots lately. I don't use an ethernet shield anymore (tested it out)... I use the Raspberry Pi for a connection now, but I'm using an Edimax Wifi adapter - no wires :) The relay shield is okay for small things (small pumps, maybe a 400W fan at the most) but for...

Oh no! What happened?! :-o

I just ordered some different parts, project box, power inlet, etc.. and I'm going to be putting that all together once it gets here. Also ordered up some headers and have some copper pcb boards here and I'm going to make some Arduino Mega shields for connecting up to the LCD Screen and the...

It does take time, but it's a good learning experience and now everything is customizable and it's pretty easy to add some code and add a new feature if you want it. I hate buying something and finding you want some feature later on and there's no way to just 'add' it in.

Thanks, I'll remove the dome. I think the heating mat helped a lot to get the initial rooting. I just had all of the clones in rockwool cubes in a humidity dome over top of the heating mat. I didn't see any roots starting to appear until I had the mat and I waited almost 2 weeks... In a last...

Congratulations dude!! :clap: So exciting for a first grow... I'm on my second now.

Strange... All my clones rooted and I now am giving them some minor nutrients to keep them happy - hand watering now... :) I'm just worried about the lighting for them. I have my other girls in the flowering room, but am still using a fluorescent tube from a 'Jump Start' ... The other...

Spandy, just curious to what kind of CO2 controller you have and how much it was?