Its up and working. Thanks!
Having a few difficulties getting my payload back from the API:
I'm sending 5 bytes in the payload. In the API they have been transformed into two unicode characters it seems.
I sent a byte array {1,0,0,0,1}. However this is what the API gives back: {"data_raw":"gAEABAIAAwAGQrAGbG3R","node_eui":"02040001","time":"2015-12-30T16:42:18.573Z","data_plain":"\u0001\u0000","gateway_eui":"0203090000000002","data":"AQA="}
I wasn't expecting the network or API to make inferences about my data. Because of the limited payload size (5 bytes it seems) i would like to use all available bits.