I think that that might be a feasible reason of what I don't get anything on my device. However, the contact of Kerlink insists that the correct example to send somthing to a mote is like this
{"tx":{"moteeui":"0132FBCF","txmsgid":"0000000000","trycount":5,"txsynch" : false,"ackreq" : false,"userdata":{"port":2,"payload":"AA=="}}}
So, to me a payload like AA== is not encrypted at all, is it? It seems more standard base64
I did try it as well, and it didn't work either...
That is true, I was using as well that port for testing purpose, and If I bind my udp server to such a port it I could receive as well the data coming from the gateway, however for sending data to the gateway I was not sending to that port, as my images shown, I was using a different ones, actually I tried several and none worked out.