My home automation setup will make use of Arduinos and also embedded Linux devices. I’m currently looking into a few boards to see if any meet my criteria.
The most important factor for me is that the device must be supported in upstream Linux (preferably stable, but mainline will do) and U-Boot. I do not wish to use any old, crappy, vulnerable vendor trees!
The Orange Pi One is a small, cheap ARM board based on the AllWinner H3 (sun8iw7p1) SOC with a quad-Core Cortex-A7 ARM CPU and 512MB RAM. It has no wifi, but does have an onboard 10/100 Ethernet provided by the SOC (Linux patches incoming). It has no NAND flash (not supported upstream yet anyway), but does support SD. There is lots of information available at http://linux-sunxi.org.
Note that while Fedora 25 does not yet support this board specifically it does support both the Orange Pi PC (which is effectively a more full-featured version of this device) and the Orange Pi Lite (which is the same but swaps Ethernet for WiFi). Using either of those configurations should at least boot on the Orange Pi One.