Made this small mount for the cheap IP camera boards. These cameras are based on the Hi3518 chip, and the board is only 38x38mm. I got a couple for US$16 and it is 720p which is enough for what I need.

This case has 3 parts. The lid slides into the main case so I can use some silicone to make it weatherproof. I attached the arm with a 3 mm screw and nut.

Example camera: http://www.aliexpress.com/item/720P-1-0Megapixels-1-4-OV9712-Sensor-Hi3518-ip-camera-board-camera-module-with-LAN-cable/32343508115.html