OrangePiOne
Official site
http://www.orangepi.org/
40 pin header pi out (compatible with Raspberry Pi B+)
http://www.raspberrypi-spy.co.uk/2014/07/raspberry-pi-b-gpio-header-details-and-pinout/
Locating the UART: It must be 3.3V USB-serial!
The UART pins are located next to Ethernet / USB jack on the boards. They are marked as TX, RX and GND on the PCB. Just attach some leads according to our UART Howto. https://linux-sunxi.org/UART
https://linux-sunxi.org/Orange_Pi_Lite
Quick Start Guide
http://www.cnx-software.com/2016/03/16/orange-pi-one-board-quick-start-guide-with-armbian-debian-based-linux-distribution/
Ambian Orane Pi One
http://www.armbian.com/orange-pi-one/
Hardware detail
https://linux-sunxi.org/Orange_Pi_Lite