The TV box you are talking about is pretty much like the Cubieboard2, which is also an A20 processor, except the cubieboard2 has 1GB of DDR3 memory. I use a Cubieboard3, also known as a Cubietruck, which is an A20 dual core 1Ghz with 2GB of DDR3 memory. The Cubietruck runs Cubuntu server, on this I run openHAB, Node,js, Node-RED and Mosquitto server. I have the MySensor serial Gateway connected to the USB port of my Cubietruck and node-red handles all the incoming serial messages and parses them to an MQTT format, and the other way around it takes MQTT message and parses them to a MySensor serial format and sends it the serial gateway. I also have a 128GB SSD attached to it and use it as a NAS for my 3 OpenELEC media center servers running on Raspberry Pi's and I also have some Raspberry Pi's with PiCams that stream mjpeg videos to the NAS. It works like a charm all in one little package.
I have been documenting my installation and configuration progress, one day when I have more time I will put it up somewhere.
Regards,
Mike