DIY portable 12v/5v power supply.

Do you have a nearly dead UPS battery, a bundle of wires and $15? Why not to combine them into the PSU which will provide you both +12V and +5V to power almost full range of gadgets?

Check my post here for details. 

Bluetooth is running on my Xiaomi Yi camera.

So as for now we have: telnet, ftp, station mode wifi and now it's time for bluetooth to run in full force.

Let's name the beast: GoPrawn here it comes.

UPD: Welcome to my action camera forum: GoPrawn.com