I have setup a single channel LoRaWAN gateway connected to the crowed source LoRa network The Things Network.
Hardware used is a Raspberry Pi and a Dragino version 1.4 (3.3V) Arduion HAT with a SX1276 chip. Got it via AliExpress. Credits to LogMaker360 for the video.
Update March 18, 2017
I had today to change the TTN server address to 22.214.171.124