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FEZHydra networking and R2-Beta2 release


I’m testing some code ported to 4.3 to FEZHydra. I starting to check ethernet code and doesn.t work.

        static EthernetENC28J60 CreateEthernetInterface()
            foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
                Debug.Print(" -> " + nic.NetworkInterfaceType.ToString());

            // ********** FEZHydra ****
            //Eth1 = new EthernetENC28J60(SPI.SPI_module.SPI1, GHI.Pins.Generic.GetPin('A', 29),
            //                                    GHI.Pins.Generic.GetPin('D', 17), GHI.Pins.Generic.GetPin('A', 13), 4000);
            //Eth1 = new EthernetENC28J60(SPI.SPI_module.SPI1, GHI.Pins.G400.PB13, 
            //                                 GHI.Pins.G400.PB8   , GHI.Pins.G400.PB9, 4000);
            Eth1 = new EthernetENC28J60(SPI.SPI_module.SPI1, (Cpu.Pin) 45, (Cpu.Pin) 40, (Cpu.Pin) 41, 4000); //socket 3
            //Eth1 = new EthernetENC28J60(SPI.SPI_module.SPI1, (Cpu.Pin) 46, (Cpu.Pin) 34, (Cpu.Pin) 11, 4000); // socket 4

            return Eth1;

        static void StartEthernet()
            Eth1 = CreateEthernetInterface();
            NetworkChange.NetworkAddressChanged += new NetworkAddressChangedEventHandler(Eth1_NetworkAddressChanged);
            NetworkChange.NetworkAvailabilityChanged += new NetworkAvailabilityChangedEventHandler(Eth1_CableConnectivityChanged);

            Eth1.NetworkInterface.EnableStaticIP(_boardIp, _boardNetmask, _boardGw); // class C net
            string [] DnsAddresses = new string[] { "" , ""};
            Eth1.NetworkInterface.PhysicalAddress = new byte[] { 0x00, 0xC0, 0x03, 0x00, 0xC1, 0x05 }; // MACADDR: 00-C0-03-00-C1-03
            if (!Eth1.CableConnected)
                NetworkAvailablityBlocking = new ManualResetEvent(false);
                    if (!Eth1.CableConnected)
                        Debug.Print("Ethernet cable is not connected yet.");
                while (!NetworkAvailablityBlocking.WaitOne(5000, false));
            while (IPAddress.GetDefaultLocalAddress() == IPAddress.Any)
                Debug.Print("IP address is not set yet.");
            Debug.Print("IP address is set " + Eth1.NetworkInterface.IPAddress.ToString() + " - " + EthernetENC28J60.ActiveInterface.IPAddress);

        static void Eth1_NetworkAddressChanged(object sender, EventArgs e)
            Debug.Print("New address for The built-in Ethernet Network Interface ");

            Debug.Print("Is DhCp enabled: " + Eth1.NetworkInterface.IsDhcpEnabled);
            Debug.Print("Is DynamicDnsEnabled enabled: " + Eth1.NetworkInterface.IsDynamicDnsEnabled);
            Debug.Print("NetworkInterfaceType " + Eth1.NetworkInterface.NetworkInterfaceType);
            Debug.Print("Network settings:");
            Debug.Print("IP Address: " + Eth1.NetworkInterface.IPAddress);
            Debug.Print("Subnet Mask: " + Eth1.NetworkInterface.SubnetMask);
            Debug.Print("Default Getway: " + Eth1.NetworkInterface.GatewayAddress);
            Debug.Print("Number of DNS servers:" + Eth1.NetworkInterface.DnsAddresses.Length);

            for (int i = 0; i < Eth1.NetworkInterface.DnsAddresses.Length; i++)
                Debug.Print("DNS Server " + i.ToString() + ":" + Eth1.NetworkInterface.DnsAddresses[i]);


The ENC28 module is created runtime and not via gadgeteer GUI and is plugged on socket 3 (S) (but same result on socket 4).
The board is not pingable but arp is resolved to correct mac addr.
I’ve no clue. Did I forget something for 4.3 eth initialization ?



I had the same problem in the beta release. The network was definitely not running on hydra. I tried DHCP and fix IP…


I was able to reproduce the issue. As a temporary workaround, if I commented out setting the PhysicalAddress, everything worked properly.


Hi John,

I tried this setup from a 4.2 project working on the hydra.

I was nor able to get a connect to my router with or without DHCP…

       void SetupLAN(bool DHCPEnable, string IP, string Subnet, string Gateway, string DNSServer)
            Debug.Print("\r\n+++ SetupLAN +++");
            Debug.Print("Initializing network...");
            NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();
            if (interfaces != null && interfaces.Length > 0)
                NetworkInterface networkInterface = interfaces[0];
                Boolean isDhcpWorked = false;
                // dynamic IP address
                if (networkInterface.IsDhcpEnabled == false) networkInterface.EnableDhcp();
                // Wait for DHCP (on LWIP devices)

                if (DHCPEnable == true)
                    for (int i = 0; i < 5; i++)

                        networkInterface = NetworkInterface.GetAllNetworkInterfaces()[0];
                        if (networkInterface.IPAddress != "")
                            isDhcpWorked = true;

                        Debug.Print("Waiting for an IP Address...");

                if (Microsoft.SPOT.Hardware.SystemInfo.SystemID.SKU != 3)
                    if (isDhcpWorked == false)
                        //static IP address
                        networkInterface.EnableStaticIP(IP, Subnet, Gateway);
                        networkInterface.EnableStaticDns(new[] { DNSServer });
                        //string h = "df";
                        Debug.Print("DHCP not enabled");

                Debug.Print("Network is ready");
                Debug.Print("  IP Address: " + networkInterface.IPAddress);
                Debug.Print("  Subnet Mask: " + networkInterface.SubnetMask);
                Debug.Print("  Default Getway: " + networkInterface.GatewayAddress);
                Debug.Print("  DNS Server: " + networkInterface.DnsAddresses[0]);
                Debug.Print("No network device found");



@ MiRo - Is that for 4.2 or 4.3 in the beta SDK?


Hi John,

I tried this code in a 4.3 SDK beta release copied from a working 4.2 Project.


Uhh funny solution ! I will try…


I’ve done some tests and the workaround works, but the Hydra board resets itself after net startup every +o- 10 sec. I saw other thread on this problem.
MFDeploy and FEZ Config can’t setup manually the network.
Definitely not usable network with SDK 4.3 for Hydra.

EDIT: I got the problem inside my code now and it’s working if get rid of the MAC setting line.
But still can cofigure network in the FEZConfig (can’t read/write settings) and in MFDeploy (it can read, but not apply settings)


@ dobova -

Make sure you used latest version of FEZ Config. The older from 4.2 does not work on 4.3.
And try again if the tool says “No responds from device”


@ Dat - I’m using last FEZConfig from SDK Beta2 (v It can’t get/set parameters from Hydra under “Network Configuration”. I’ve tested on various OS with same results: can’t read/write (“No response from device”). I can read parameter using MFDeploy 4.3.1 but then I can’t write them to board.
For more info: I can deploy/debug/clr-ping the board without any issue. I’ve same problem with LCD Configuration (can’t read/write parameter settings under “LCD Configuration”).
I’ve testes 2 different Hydra with same results.


I found that still exists in Beta2 SDK the problem on SD IO, when ReadLine() is called on a line with no char and a CR before:

 #### Exception System.IndexOutOfRangeException - 0xa9000000 (13) ####
    #### Message: 
    #### System.IO.StreamReader::Peek [IP: 001c] ####
    #### System.IO.StreamReader::ReadLine [IP: 005e] ####


@ dobova -

You can set PhysicalAddress before calling Open().


@ Dat - thank you for the suggestion!


@ MiRo - Hydra networking changed in 4.3. You have to use GHI.Networking.ENC28 now just like you do on the Premium boards.


I’ve ported the same code used for hydra on the G400HDR (fw 4.3.1).
Lot of issues:

  • USB problems when debugging and deploying code. Several time need more than 3-4 reset to attach the debugger. Often the debugger locks after deploy and before program run.
  • Network Enc28 works worse than Hydra. The board is pingable and I can run timeservice (my class not netmf class), socket lockup randomly but often.
  • No network code (socket and httplistener at least) works when running board without usb attached to the debugger. I will debug via serial port to understand more about this issue. (Debug.Print problems ?)
  • SD card works, but ReadLine() crashes if empty line is present after CR/LF.
  • I2C run fine … lol