---- OSCITY iot tmp API ----
call: http://iot.oscity.nl/api?node=ABFF0110&gateway=AA555A00080601F0&since=2015-10-17
filter params:
node=[[node id]] [ex: ABFF0110]
gateway=[[gateway id]] [ex: AA555A00080601F0]
since=[[YYYY-MM-DD HH:MM:SS]] [ex: 2015-10-17 18:16:38 or 2015-10-17][NOTE: CET+2 AMSTERDAM TIME]