DIY - Thermometer

[Skitzmixer]

I've been looking at using my pi for a humidity controller for my frogs, just something simple like when the humidity drops to a certain level the pi turns the fogger on. But to be honest I have no idea where to start.

I'll be following this thread closely

Sweet! See i knew there'd be a use for it! I'm getting anxious waiting for the gear to arrive now.

 

[saximus]

I've been looking at using my pi for a humidity controller for my frogs, just something simple like when the humidity drops to a certain level the pi turns the fogger on. But to be honest I have no idea where to start.

I'll be following this thread closely

It's pretty easy to do if you use the right type of sensor. The only problem is that the easiest to use sensors are also quite expensive. If you have one that outputs a digital signal, you just need to work out how to read the signal in the Pi then get it to turn on a relay connected to your fogger. Mine was controlling humidity within 10% of my set level which is quite good when you understand how difficult humidity is to control in an open environment like an enclosure

 

[Skitzmixer]

delays on my gear looks like it might be another week..

ah well gives me time to plan it all out

 

[Marzzy]

What's the G O ?

 

[Skitzmixer]

Just got confirmation the Pi was finally sent out! Should be able to finally start work on it in a few days.

 

[Zeusy]

Just a suggestion, and I'm not sure how much memory the Pi has but I've got my system logging temps hourly so when I get home from work I can see how the temps were during the day. I have it automatically clear the logs at midnight each day to prevent the memory being filled.

 

[T0ken]

Thanks for the inspiration, now I can combine two of my interests together.


I'd been thinking about taking info from the BOM weather site to drive one of the open source home automation packages to mimic the temps and photo periods for my cages.

Time for some online shopping....

 

[Skitzmixer]

Just a suggestion, and I'm not sure how much memory the Pi has but I've got my system logging temps hourly so when I get home from work I can see how the temps were during the day. I have it automatically clear the logs at midnight each day to prevent the memory being filled.

Good thing about this is i can get a 32GB SD card and start logging as much data as i can

 

[Skitzmixer]

Thanks for the inspiration, now I can combine two of my interests together.


I'd been thinking about taking info from the BOM weather site to drive one of the open source home automation packages to mimic the temps and photo periods for my cages.

Time for some online shopping....

Have fun, my gears finally arrived, just getting everything i need ready today and ill start soon ... hopefully!

 

[Marzzy]

Have fun, my gears finally arrived, just getting everything i need ready today and ill start soon ... hopefully!

Take a picture of what you got show us your electronic poon

 

[Skitzmixer]

Well thats all i have to show at the moment. I grabbed the AM2302 cause i found some librarys for it so it'll make my life easier, rather than having to write something for it. Says its for the Arduino board but thats ok, i might grab one of those boards as well and have a play with it, they look pretty fun.

 

[bohdi13]

hows the go with it all? is it working good? can it regulate more than one enclosure?

 

[Skitzmixer]

hows the go with it all? is it working good? can it regulate more than one enclosure?

Well i have the thing booting up and reading temps, i just need to get it to output to a file. It doesnt regulate the temps yet, just records them.. I want to nail this step first before i start introducing other things..

 

[saximus]

I know you say it's in the future but have you thought about how you'd like it to control if it does? On/Off control would be super simple if you can get your hands on a 240V relay. Dimming and pulse proportional wouldn't be too much extra work either but might need a specialist PCB to hold the necessary components.

 

[Skitzmixer]

Well im pretty happy with the way its going so far.. I've now got it writing the temp & humidity to a google docs file once every 30 seconds Next is to try and get a live graph + alerts.

@Sax - I'll start having a think / google around to find the stuff i need. I'm not really sure on how i can manage it, but i'll work it out. Looking forward to adding some more features to it

 

[saximus]

Sounds very promising. Congrats on getting so far with it so quickly

 

[Marzzy]

Updates ?

 

[ouroboros]

Geekgasm! Great ideas Looking forward to seeing the results.

 

[Skitzmixer]

Hi All

Well everything's going really smoothly. Currently I'm looking at ways to add more thermometers to the pi without having to pull everything apart (the pins that read the data are all over the place) and then looking at how I can automatically add it to the already running scripts that collects the data. I'm also starting to develop a front end in the form of a webpage that you can name your thermometers (so you can tell which is which) and starting to add graphs etc. I still haven't looked at turning it into a thermostat as well just yet, i'd prefer to get the thermometer side of things working accurately before attempting anything else.

I'm getting closer but theres just so much to do and so little time!

 

[Skitzmixer]

How often would be the best for gathering temp data? every minute? 2 minutes, 5 minutes? etc.. I think every minute might be alright..