I need a way to remotely monitor the temperature of my room. It is very important to know (for health reasons) the temperature of a specific room in my home. In the future I will also look for a way to adjust the thermostat of the room or turn A/C on/off depending on the situation but now I am looking for a way to simply track the temperature of a room remotely using smartphone, tablet or laptop. Any of the three would suffice.
Remotely tracking room temperature with smartphone, tablet or laptop
temperature
Related Solutions
Congratulations - you have eliminated all the ways this might actually work.
Either deal with it being hotter, or add a few options that you say are "not an option" with the most logical one being a connection to the central A/C.
With a bucket, you could go with 50 pounds of ice, a fan blowing over it and a bucket for it to drain into as it melts. That will get you 7,200, perhaps 8,200 BTUs before you need to get another 50 lbs of ice...or the equivalent of about an hour's run time for a medium window A/C. Not very practical without a large supply of ice and labor to carry ice and buckets of water.
Your best option is sheet vinyl. Next to that would be tile or concrete.
Most other flooring has seams which will eventually leak. Yes, you can place vinyl tiles, or even laminate flooring, if you appropriately glue/seal all the seams. Eventually the seams will leak, and in the case of laminate surface scratches must be sealed immediately to avoid damage to the laminate below the waterproof surface.
A single sheet, if possible, will provide continuous leak protection across the entire floor surface. If it's too wide for a single sheet, then a single seam is easier to keep sealed than the multiple seams found in other flooring choices.
Tile and concrete are both good options as well. Regular maintenance and upkeep will keep them in good waterproof operation for the life of the house, while vinyl will need to be replaced every decade or two.
Even though it's designed to be an unheated space, you should consider adding a vapor barrier and insulation to the flooring area. This will reduce the likelihood of later rotting or water condensation.
Keep in mind that outdoor carpet requires a sealed or well-draining surface. Your current plywood would have to be treated and sealed for the outdoor carpeting to be useful. The carpeting alone won't prevent damage to the subfloor - it will only avoid damage itself when exposed to water.
In your situation you need to protect both the flooring and the subfloor.
Regarding the cold temperatures, newer vinyl floors are much more flexible and resilient even in the fact of extreme cold weather. You'll need to specify that both the flooring and the adhesive be tolerant to freeze-thaw cycles.
Be certain that your subfloor is substantial and secure. Cracking occurs where stresses increase significantly on one area of the floor. As long as the vinyl is well-adhered to the subfloor, and the subfloor is relatively stable, then the stresses from expansion and contraction will be spread evenly across the entire surface. While these forces are large, they won't overcome the strength of the vinyl. If the subfloor develops a large gap, then the stresses in the vinyl would be greater around that gap and that's where a tear might start.
So your flooring really starts with a good, stable, strong subfloor. What you put on top, then, will be fine as long as it can deal with the water exposure.
Best Answer
If you are on the cheap and can afford running wires there is a cheap & efficient solution :
The sensors can be connected to the Pi without requiring an external adapter, then you can run a Home Automation supervisor such as OpenHAB to monitor it and triggers various actions with the inputs.