Main Site Documentation

Potential IPAddress Bug in Wifi

#1

First I wanted to say great job on the wifi module updates and overall 4.2 upgrade!

I have been able to successfully connect and disconnect wifi without a problem.

However, my up address keeps coming up 0.0.0.0 no matter what. My init setting code is:


 // Set the object up
            wifi.Interface.Open();
            wifi.Interface.NetworkInterface.EnableDhcp();

            NetworkInterfaceExtension.AssignNetworkingStackTo(wifi.Interface);
                     
            wifi.Interface.WirelessConnectivityChanged += new GHI.Premium.Net.WiFiRS9110.WirelessConnectivityChangedEventHandler(Interface_WirelessConnectivityChanged);

            t = new Thread(new ThreadStart(Connect));
            t.Start();

Some of the output I get:
Using mainboard GHI Electronics FEZSpider version 1.0
RS9110 firmware version Number is 4.4.5
RS9110 driver version Number is 4.4.5
Connecting to Home_Slow
IsConnected: True
Network is Up

The thread ‘’ (0x6) has exited with code 0 (0x0).
IsLinkConnected: True
IsOpen: True
IsActivated: True
IsNetworkConnected: True
IsNetworkUp: False
IPAddress: 0.0.0.0

I’m I doing something wrong? I thought DHCP was supposed to pull an available IP address? I need this IP address to start a local web server.
Thanks!

#2

@ Weston Bridgewater - for me 30% of the time I get leased an IP address and the and rest of the time nothing… Interface_WirelessConnectivityChanged gets fired but not the Interface_NetworkAddressChanged event.

#3

@ carpenoctem I tried that static IP setup and that works fine but not the DHCP

#4

The same thing is happening to me under 4.2 using FEZspider and a WiFi RS21 module. It seems like all the signals are okay, just DHCP fails to do it’s service (it worked normally under 4.1 using the non-premium library). Static IP works, but fails to create a web server.

What I get back using DHCP:


------------------------------------------------
IP Address:   0.0.0.0
DHCP Enabled: True
Subnet Mask:  0.0.0.0
Gateway:      0.0.0.0
DNS server:   208.67.222.222
------------------------------------------------
Actvated: True
Link connected: True
------------------------------------------------
Web server started at http://0.0.0.0:80/
#5

Any ideas for a workaround? Thanks, I’d appreciate it.

#6

We are investigating this still.

#7

calling wifiMod.Interface.Open(); seemed to intermittently fail on socket 6 and then constantly started failing; right now I just moved to socket 9 and I haven’t received the exceptions I was getting on socket 6. hope this helps at all.

#8

Hm… now NetworkInterfaceExtension.AssignNetworkingStackTo(wifi.Interface); is causing exceptions:

#### Exception GHI.Premium.Net.NetworkInterfaceExtensionException - 0x00000000 (1) ####
#### Message: 
#### GHI.Premium.Net.NetworkInterfaceExtension::Activate [IP: 001a] ####
#### Via_prototype.Program::ProgramStarted [IP: 003b] ####
#### Via_prototype.Program::Main [IP: 0015] ####

A first chance exception of type ‘GHI.Premium.Net.NetworkInterfaceExtensionException’ occurred in GHI.Premium.Net.dll
An unhandled exception of type ‘GHI.Premium.Net.NetworkInterfaceExtensionException’ occurred in GHI.Premium.Net.dll

Switching sockets doesn’t help.

#9

@ carpenoctem - now when connected to another network I get an exception when I either SCAN and JOIN or just explicitly JOIN:

#### Exception System.NullReferenceException - CLR_E_NULL_REFERENCE (8) ####
#### Message: 
#### PetComm.Program::ConnectToWifiNetwork [IP: 005e] ####
#### PetComm.Program::InitializationStep2OnSecondaryThread [IP: 001f] ####

A first chance exception of type ‘System.NullReferenceException’ occurred in PetComm.exe
#### Exception GHI.Premium.Net.NetworkInterfaceExtensionException - 0x00000000 (8) ####
#### Message:
#### GHI.Premium.Net.WiFiRS9110::Join [IP: 0027] ####
#### PetComm.Program::ConnectToWifiNetwork [IP: 013e] ####
#### PetComm.Program::InitializationStep2OnSecondaryThread [IP: 001f] ####

#10

Is there an alternative library that I can use until this is resolved? It was working normally under 4.1, but since the wifi features now moved to the Premium library, is there a way I can still use the old library? Or maybe some other suggestions?

I hate to bitch, but I have a project on hold because of this.

#11

This shouldn’t take more than one or 2 weeks but if you need it sooner then you can try 4.1 if this helps.

#12

We just noticed this

NetworkInterfaceExtension.AssignNetworkingStackTo(wifi.Interface);

it should be

NetworkInterfaceExtension.AssignNetworkingStackTo(wifi);

#13

I tried that but get this error when I do that:


NetworkInterfaceExtension.AssignNetworkingStackTo(wifi);

Error	2	Argument 1: cannot convert from 'Gadgeteer.Modules.GHIElectronics.WiFi_RS21' to 'GHI.Premium.Net.NetworkInterfaceExtension'	C:\Users\Weston\Google Drive\Senior Project\Past Projects\Wifi_Test\Wifi_Test\Wifi_Test\Program.cs	35	63	Wifi_Test
Error	1	The best overloaded method match for 'GHI.Premium.Net.NetworkInterfaceExtension.AssignNetworkingStackTo(GHI.Premium.Net.NetworkInterfaceExtension)' has some invalid arguments	C:\Users\Weston\Google Drive\Senior Project\Past Projects\Wifi_Test\Wifi_Test\Wifi_Test\Program.cs	35	13	Wifi_Test



private void InitializeModules()
        {   
            // Initialize GTM.Modules and event handlers here.		
            wifi = new GTM.GHIElectronics.WiFi_RS21(6);
        }
#14

I have no idea if this has anything to do with anything, but I’ve just noticed that GHI.Premium.Net library includes misspelled “network” a couple of times (e.g. “AssignedNetwrokInterface”).

Either way, still nothing wrong if you correct it. :slight_smile:

#15

Hello, this is the code that works for me (partially - code works for network at my work, at my home does not work, but I think that’s because some kind of problem with my router)

void ConnectMe()
        {
            if (!wifi_RS21.Interface.IsOpen)
                wifi_RS21.Interface.Open();
 
            if (!wifi_RS21.Interface.NetworkInterface.IsDhcpEnabled)
                wifi_RS21.Interface.NetworkInterface.EnableDhcp();
 
            NetworkInterfaceExtension.AssignNetworkingStackTo(wifi_RS21.Interface);
 
            wifi_RS21.Interface.WirelessConnectivityChanged += new WiFiRS9110.WirelessConnectivityChangedEventHandler(Interface_WirelessConnectivityChanged);
            wifi_RS21.Interface.NetworkAddressChanged       += new NetworkInterfaceExtension.NetworkAddressChangedEventHandler(Interface_NetworkAddressChanged);
            wifi_RS21.NetworkDown                           += new GTM.Module.NetworkModule.NetworkEventHandler(wifi_RS21_NetworkDown);
            wifi_RS21.NetworkUp                             += new GTM.Module.NetworkModule.NetworkEventHandler(wifi_RS21_NetworkUp);
 
            WiFiNetworkInfo[] ScanResp = wifi_RS21.Interface.Scan("MyAP");
            if (ScanResp != null && ScanResp.Length > 0)
                wifi_RS21.Interface.Join(ScanResp[0], "MyPwd");
 
            Debug.Print("Connected to network...");
            Gadgeteer.Networking.HttpRequest wc = WebClient.GetFromWeb("http://www.google.com");
            wc.ResponseReceived += new HttpRequest.ResponseHandler(wc_ResponseReceived);
            Debug.Print("Waiting for response...");
        }
 
        void wifi_RS21_NetworkUp(GTM.Module.NetworkModule sender, GTM.Module.NetworkModule.NetworkState state)
        {
            Debug.Print("NetworkUp event!");
        }
 
        void wifi_RS21_NetworkDown(GTM.Module.NetworkModule sender, GTM.Module.NetworkModule.NetworkState state)
        {
            Debug.Print("NetworkDown event!");
        }
 
        void Interface_WirelessConnectivityChanged(object sender, WiFiRS9110.WirelessConnectivityEventArgs e)
        {
            Debug.Print("WirelessConnectivityChanged event!");
            Debug.Print("IP Address : " + wifi_RS21.Interface.NetworkInterface.IPAddress);
        }
 
        void wc_ResponseReceived(HttpRequest sender, HttpResponse response)
        {
            Debug.Print("Response is received");
            string text = response.Text;
        }
 
        void Interface_NetworkAddressChanged(object sender, EventArgs e)
        {
            Debug.Print("NetworkAddressChanged event!");
            Debug.Print("IP Address : " + wifi_RS21.Interface.NetworkInterface.IPAddress);
        }
#16

@ tvinko Which socket are you using? Does it work normally on both 6 and 9?

NetworkInterfaceExtension.AssignNetworkingStackTo(wifi_RS21.Interface);

This gives me an exception every time, no matter the socket I use.

NetworkInterfaceExtension.AssignNetworkingStackTo(wifi_RS21);

This gives me the same error as Weston Bridgewater gets.

#17

Work on 9 and 6. Do you get socket error? What is error code?

#18

From Gus’ message earlier, you do not pass the .Interface of your wifi object to the Assign Networking Stack call.

#19

I’m using 4.2 sdk, and AssignNetworkingStackTo method doesn’t support wifi_RS21 object, but it’s interface property. I’m programming in Micro Framework for two days now, so I could say some nonsense things…

#20

@ brett

To clarify again, if I do not pass it, I get this error:

Error	2	Argument 1: cannot convert from 'Gadgeteer.Modules.GHIElectronics.WiFi_RS21' to 'GHI.Premium.Net.NetworkInterfaceExtension'	C:\Users\jure\AppData\Local\Temporary Projects\GadgeteerApp1\Program.cs	40	63	GadgeteerApp1

If I do pass it, I get this exception:

    #### Exception GHI.Premium.Net.NetworkInterfaceExtensionException - 0x00000000 (1) ####
    #### Message: 
    #### GHI.Premium.Net.NetworkInterfaceExtension::Activate [IP: 001a] ####
    #### GadgeteerApp1.Program::ProgramStarted [IP: 0024] ####
A first chance exception of type 'GHI.Premium.Net.NetworkInterfaceExtensionException' occurred in GHI.Premium.Net.dll
An unhandled exception of type 'GHI.Premium.Net.NetworkInterfaceExtensionException' occurred in GHI.Premium.Net.dll