Configurable echo server

Author: dhwalters423

main.cpp

@@ -47,10 +47,10 @@
 OnboardCellularInterface iface;
 
 // Echo server hostname
-const char *host_name = "echo.mbedcloudtesting.com";
+const char *host_name = MBED_CONF_APP_ECHO_SERVER_HOSTNAME;
 
 // Echo server port (same for TCP and UDP)
-const int port = 7;
+const int port = MBED_CONF_APP_ECHO_SERVER_PORT;
 
 static rtos::Mutex trace_mutex;
 

mbed_app.json

@@ -21,10 +21,13 @@
             "help": "The password string to use for this APN, set to 0 if none",
             "value": 0
         },
-        "trace-level": {
-            "help": "Options are TRACE_LEVEL_ERROR,TRACE_LEVEL_WARN,TRACE_LEVEL_INFO,TRACE_LEVEL_DEBUG",
-            "macro_name": "MBED_TRACE_MAX_LEVEL",
-            "value": "TRACE_LEVEL_INFO"
+        "echo-server-hostname": {
+            "help": "Echo server host name.",
+            "value": "\"echo.mbedcloudtesting.com\""
+        },
+        "echo-server-port": {
+            "help": "Echo server port number.",
+            "value": 7
         }
   },
     "target_overrides": {