Switch to MQTT and add a LTE interface

.gitignore

@@ -3,3 +3,4 @@
 satcomSDcard/
 *~
 .settings*
+credentials.cfg

relay.cfg

@@ -1,43 +1,35 @@
-# Message broker (rabbitmq) connection details
-# Default port is 5672
-[rabbitmq]
-hostname = localhost
-port = 5672
+# MQTT broker (mosquitto) connection details
+# Default port is 1883
+[mqtt]
+
+port = 1883
 
 # change stuff here:	v	v	v	v	v	v	v	v	v	v	v	v	v	
 #---------------------------------------------------------------------------
-# username and password of the rabbitmq broker
-user = ENTER_HERE
-password = ENTER_HERE
 
-#---------------------------------------------------------------------------
-#	^	^	^	^	^	^	^	^	^	^	^	^	^	^	^	^	^	^
+# relay server address:
+# for simulator
+hostname = localhost
 
+# for real application
+#hostname = ENTER_HERE
 
-# Rock7 HTTP interface connection details
-[iridium]
+# Local UDP connection details
+[lte]
 
-# change stuff here:	v	v	v	v	v	v	v	v	v	v	v	v	v	
-#---------------------------------------------------------------------------
+# UDP port on which the relay server is listening for messages
+target_port = 30000
 
+[iridium]
 # Address of the destination Rock7 HTTP gateway:
 # for simulator
 url = http://localhost:45678
 
 # for real application
-#url = ENTER_HERE
-
-# IMEI of the destination RockBLOCK modem
-imei = ENTER_HERE
-
-# Rock7 username
-username = ENTER_HERE
-
-# Rock7 password
-password = ENTER_HERE
+#url = https://core.rock7.com/rockblock/MT:80
 
 #---------------------------------------------------------------------------
 #	^	^	^	^	^	^	^	^	^	^	^	^	^	^	^	^	^	^
 
 # Local port listening for MT messages from the Iridium gateway
-local_port = 45679
+local_port = 45679