Reverend Jim
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If I were to want to make a humidity monitor that I could plug into the USB on my laptop (or even a controller that turns on off a 120 V US household outlet that a dehumidifier is plugged into), where would I start?
Damn, you beat me to it! lol I was gonna suggest the DHT22 as well.https://www.hackster.io/attari/temperature-monitoring-with-dht22-arduino-15b013
Ideally there should be a 10KOhm resister between Data and Vcc on the DHT22
If you want to control an outlet, you'll need to add a 120V relay. I started out with this simple project that got me hooked. As previously mentioned, there should be a 10K ohm resistor between 'VCC' and '+5v'Wow, Loving this stuff. I wish I had the brains/experience to wrap my head around all of it. However, I'm a perpetual tinkerer, so I want to try to take a baby step. If I were to want to make a humidity monitor that I could plug into the USB on my laptop (or even a controller that turns on off a 120 V US household outlet that a dehumidifier is plugged into), where would I start? Any good tutorial out there on the interwebs to cut my teeth on for something like that? Thanks all...
It all boils down to Time and Money.i know all this can be done i've been on the fence about doing this system or just getting something like a vera plus that's a z wave controller and also integrate the camera system
- temp notification
- humidity notification
- lighting notification
- water spillage notification and auto shutoff
- automate watering
- automate nutrient dosing into nutrient res
Cheese and rice, man! 4,000°F!? Are you sure it didn't just teleport down to the earth's mantle and back while you weren't paying attention? lolThose DHT22 sensors are terribly inaccurate.
I'll see if I can find the ones I used. I did use the DHT22 for a while but kept having problems with spikes. Every now and then it will read the temp as 4000F and it fucks up the graph.
so how much hardware does something like that require? I'm looking into the RPi Zero considering making something similar to what you've got down the road. I'm most interested in accessing the data via wifi, but the camera would be a nice touch.I have not incorporated my Arduino yet but I have 3 Raspberry Pi's going. One in each room.
Keeps track of Temp, Humidity, CO2, and some other stuff. The moisture sensors go into each pot and monitor water in each pot. There's a camera attached to each one so it can do a pretty cool time lapse. I still have a lot to do but Summer came and I dropped the ball until it gets cold again.
The RPi monitors real well. The Arduino responds to the RPi data well. The 2 work great together.
Here is what it looks like right now. Like I said, I still have plenty to do. :)
View attachment 829540
Right! So can you use the same breakout boards with RPi as with Duino? I like the idea of wifi connectivity but don’t want to have to buy new sensors on top of learning the new system.RPi's are pretty cheap. I think around $30 or so. However, power supplies, sensors, etc all seem to add up. LOL
Right! So can you use the same breakout boards with RPi as with Duino? I like the idea of wifi connectivity but don’t want to have to buy new sensors on top of learning the new system.
If you wanted you should be able to add a peristaltic pump or 2 and have it adjust the pH automaticallyi'm trying to keep it as simple as possible. A flood and drain setup that only controls my temps automatically when the lights are on. Lights & flood pump are controlled using millis, I didn't see a reason the have an rtc controlling timer functions if the timing is to be consistent. As for ph & res water level control. I'm gonna have the arduino check these after every flood cycle & have led's to indicate if these are off & easily seen from a distance. This is the only time i would need to check in on the grow. So far, my lights, fans, water level & flood cycles are working perfectly for the past 10 months. I haven't started the programming for the ph probe as of yet & since this is a flood & drain set up with no airpump, my ph rarely fluctuates out of 5.8-6.2 range since it's flooded every 3 hours, which only happened twice so far because of once a day flood cycles in the beginning. Since then, I've only needed to check my ph when I'm topping up the res. I even have the same current setup in my pc momsai box which has been running for 9 months which uses a digispark.
It was something i had considered when i was building my system to be a dwc sog system but after shutting down my dwc system for a week & didn't clean my system out, I went ahead & checked the ph which was still the same, I experimented & concluded that ph majorly changes when air was pumped through the solution. Ebb & flow without the airpump will only get the air in the solution when the solution is running back into the res. Since I'm running an perpetual sog (dr bud style harvesting every week) system in both 100% coco & 100% perlite, When I check the res, the solution is still basically the same as when i first put it in, so i would do my harvest, put my new clones in, top up the res with water, add more nutes to get my 500ppm & ph the res back to 6.0. All this just once a week, most times in less than 10 mins, unless I'm changing out the res & mind you this is once a week. Even if the res is really close to being empty, my solution is still close to the 500ppm & still within the 5.8-6.2 ph range. for me this works well since i harvest once a week anyway.If you wanted you should be able to add a peristaltic pump or 2 and have it adjust the pH automatically
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