Hi all! I've tried Xulong Extension board for Orange Pi Zero and found it useless waste of my money. Almost two months ago I've decided to make my own hacking shield which allows me much more in terms of control and peripherals. I've tested functionality most important to me and I'm pretty happy with result. I2C works, USB power switch works, power measurement works. Project page on GitHub Now I'm in progress making peripherals accessible to the system and user. Userspace tools for python/node/C works and later I will publish tutorial (or more than one) how to make it (because it is not clear to me and take huge amount of time).