I'm looking to build my own thermostat with multiple temp sensors and lcd with buttons. I have never done anything with the arduino unit however I know multiple people have done this exact thing. The code I hope to write most of it my self. I want to start getting some hardware but i'm not sure what all to get to start with. Here is what I plan on doing:
-finished project will be ethernet connected -control HVAC/Fan/Heat -run on a schedule -log power on/power off of hvac fan heat as well as the temp of the house either onboard or to an external server or both -3 seperate temp in 3 rooms and average the temp for a better reading -LCD with ~2 buttons (maybe a switch to shut off all cooling/heating) to display current stats as well as temp change to override schedule. -an alternative is an LCD screen with a touchscreen overlay as the interface ~pull power from current line for power and save settings to eprom but have a battery in case of power failure
This is what I have questions about: -Will I need more than one arduino unit? -What kind of unit(s) will I need? -Should I go with a larger unit to allow for a small web server (not sure what the limitations of the arduino are)?