Standalone camera which upload pictures on button press ? Not too expensive...

Hello,

i am searching for a stand alone camera (webcam) which can upload a picture
on a button press.
It should be not too expensive and each picture must have a different
filename, so i get a picture series of each button press.
If important, camera points to east, so no direct sun into camera.

Can someone suggest such a camera ?

Regards,

Martin