Solved the issue below which I also used to observe a long time ago w…

…hen I would be doing MQTT testing. Also see this thread below on me instructing other folks on how to solve it on their setups. ARMmbed/mbed-mqtt#30 Nuertey-Dragonfly-Cellular-LightControl Application - Beginning... Mbed OS version: 6.15.1 Built: May 27 2022, 07:58:10 Running LEDLightControl::Setup() ... [00000179ms][INFO][STE1]: power_up: PHY Addr 0 AutoNeg 1 [00000254ms][DBG ][STE1]: MAC Addr 00:80:e1:37:00:25 [00000325ms][INFO][STE1]: ETH buffers : 4 Rx 4 Tx [00001871ms][INFO][STE1]: PHY ID 7C130 [00001939ms][INFO][STE1]: low_level_init_successful Connecting to network ... [00002207ms][INFO][STE1]: emac_link_state_cb set to true Global IP address set! Running LEDLightControl::ConnectToSocket() ... Particular Network Interface IP address: 10.42.0.58 Particular Network Interface Netmask: 255.255.255.0 Particular Network Interface Gateway: 10.42.0.1 Particular Network Interface MAC Address: 00:80:e1:37:00:25 Connecting to "10.42.0.1" as resolved to: "10.42.0.1:7" ... Error! TCPSocket.connect() to EchoServer returned: [-3004] -> "not connected to a network"
nuertey · May 27, 2022 · 026a768 · 026a768
1 parent 96d9020
commit 026a768
Show file tree

Hide file tree

Showing 3 changed files with 11 additions and 3 deletions.
diff --git a/LEDLightControl.h b/LEDLightControl.h
@@ -442,6 +442,7 @@ void LEDLightControl::ConnectToSocket()
             // event again should network conditions become better favorable.                
             return; 
         }
+
         m_TheSocketAddress.set_port(m_EchoServerPort);
 
         if (m_TheTransportSocketType == TransportSocket_t::TCP)

diff --git a/Utilities.h b/Utilities.h
@@ -155,8 +155,15 @@ namespace Utilities
                 // user can choose to specify IP addresses directly in the mbed_app.json
                 // echo-server-hostname field. This will facilitate testing with
                 // locally hosted Echo Servers, which by necessity, do not have 
-                // DNS names.
-                ipAddress.emplace(address.c_str()); 
+                // DNS names. 
+
+                // In which case the following is how we can ensure that the requisite 
+                // SocketAddress object that is normally created during FQDN resolution,
+                // is manually constructed and propagated back to the User:
+                SocketAddress tempSockAddress(address.c_str(), 0);
+                *pTheSocketAddress = tempSockAddress;
+
+                ipAddress.emplace(address.c_str());                
             }
         }
 

diff --git a/mbed_app.json b/mbed_app.json
@@ -7,7 +7,7 @@
         "sock-type": "NUERTEY_TCP",
         "echo-server-hostname": {
             "help": "Echo server host name.",
-            "value": "\"10.50.10.25\""
+            "value": "\"10.42.0.1\""
         },
         "echo-server-port": {
             "help": "Echo server port number.",
-Original file line number
+Diff line change
@@ Expand Up / @@ -442,6 +442,7 @@ void LEDLightControl::ConnectToSocket() @@
                 // event again should network conditions become better favorable.
                 return;
             }
             m_TheSocketAddress.set_port(m_EchoServerPort);
             if (m_TheTransportSocketType == TransportSocket_t::TCP)
@@ Expand Down @@