visualizing temperature

I made it visualize and save image every 30 minutes for 3 days. By one day test, I learned weak battery made totally different result. So I decided to use an arduino board as the power and regulator for 3 days. I gave up with casing.

I expected interesting result like this,but the room temperature didn’t change a lot, even I opened window.  This image is a light sensor test with same code.

I saved 120 images for 3 days.