I would like to start a project with my Arduino Uno and a temperature or humidity sensor.
What I would like it to do is read the temperature and/or the humidity in a room and have the arduino respond/communicate back by sending an output to different LED's.
I'm very new to the arduino uno and any programming in general, but ideally, would like this to demonstrate an idea I have for a greenhouse sensor.
I would like to have a target range for both the temp and/or humidity, and once the temp is outside of that range it would light up two different LED's - one that says the temp or humidity is too high, and one that says the temp or humidity is to low.
I have a few questions as to how to even get started with this:
1.) What specific sensor would you suggest? There are so many out there, I would like one that is ready to go - all I need to do is plug it in - no soldering or anything like that.
2.) Where do I look for help on setting up code? It looks like I'm going to need code for the computer to be able to read the input, and then I'm going to need code to communicate the output?
Ha! As you can tell I have no idea what I'm doing...just thought maybe someone could help point me in a direction, as google has not been much help these past few hours...
I just made a humidity controller with temperature readings. I actually used a different micro controller (Picaxe) but should work with arduino fine if not better since you can use floating point numbers.
I highly suggest using a Honeywell HIH-4000-01 humidity sensor. It's 5v and is very easy to use.
Both sensors will utilize the built in ADC. The ADC will convert a voltage change to a digital value. Then you convert that to a humidity or temperature value.
My project controlled a relay. Once my humidity was too high the relay would shut off until the humidity dropped then it would kick back on.
It is not what I would consider overly accurate, but it gets the job done and is fairly easy to interact with, I'm using one in a garden remote sensor to monitor humidity and ambient temperature trends.