Currently there are actually 5 different builds of this software:

• v1 - LCD - primary build created in 2014 (/Arduino/humidor)
• v2 - Touch - new build, fancy but expensive (Arduino/tft)
• low cost - build with no screen or buttons (Arduino/low_cost)
• multi sensor version (Arduino\multi_sensor_version)
• Arduino Yun Test (\Arduino\tests\yun_tft)

The v1 LCD ($100) I ran full time for a year solid and has been very stable, especially with the external watchdog in place. I think I finally found the bug which was causing occasional hangs though so the external watchdog may no longer be necessary.

The v2 touch screen version ($160) was just released mid December 2015 and is in long term testing trials now. It appears to be stable at this point. I will update this in several months.

The low cost build ($40) is pretty much complete, but I need to run long term stability tests on it still. There is a dedicated readme file in its folder on how to set it up.

The last two are projects I have tinkered with as tests, they should (probably) work but i forget where i left off on them.

If there is an interest I may also create a build based around the netduino microcontroller.