Using Ethernet port, Not getting DNS via DHCP

TinyCLR OS
1

Hi Apologies if this is something stupid, I’ve been trying out the networking on the SCM20260D.
I’ve used the example code:

            //Reset external phy.
            var gpioController = GpioController.GetDefault();
            var resetPin = gpioController.OpenPin(SC20260.GpioPin.PG3);

            resetPin.SetDriveMode(GpioPinDriveMode.Output);

            resetPin.Write(GpioPinValue.Low);
            System.Threading.Thread.Sleep(100);

            resetPin.Write(GpioPinValue.High);
            System.Threading.Thread.Sleep(100);

            _controller = NetworkController.FromName(SC20260.NetworkController.EthernetEmac);

            var networkInterfaceSetting = new EthernetNetworkInterfaceSettings();

            var networkCommunicationInterfaceSettings = new BuiltInNetworkCommunicationInterfaceSettings();
            networkInterfaceSetting.MacAddress = new byte[] { 0x00, 0x4, 0x00, 0x00, 0x00, 0x00 };
            networkInterfaceSetting.DhcpEnable = true;

            _controller.SetInterfaceSettings(networkInterfaceSetting);
            _controller.SetCommunicationInterfaceSettings(networkCommunicationInterfaceSettings);

            _controller.SetAsDefaultController();

            _controller.NetworkAddressChanged += NetworkController_NetworkAddressChanged;
            _controller.NetworkLinkConnectedChanged += NetworkController_NetworkLinkConnectedChanged;

            _controller.Enable();

When the Network Address changes with DHCP, the address is set but the DNS entries are set to 0.0.0.0:

Address changed: 0.0.0.0 DNS = 0.0.0.0
Network Link Connected Changed
Address changed: 169.254.1.0 DNS = 0.0.0.0
    #### Exception System.InvalidOperationException - CLR_E_INVALID_OPERATION (1) ####

I’ve tried setting networkInterfaceSetting.DynamicDnsEnable = true and that didn’t make any difference. Also, it looks like the IP address that is set, isn’t in the normal range of 172.24.1.* for my network.

Any ideas?

Thanks for any help,
Jas

2

The 169.254.x.x is the Auto IP address that was recently added to TinyCLR (APIPA (AutoIP))
If it can’t get an address from the DHCP server it will self-assign an address in the 169.254.x.x range.

So it seems it is not getting an address from the DHCP server for some reason. Can you use a fix IP address and see if you can ping the device from a PC?

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3

I’ve tried to set it to a set IP (And set the gateway/dns manually) and getting a timeout error. I have a Wifi 7 Click board (MIKROE-2046) on order and I’ll try again with that when it arrives.

4

Hi All,
Got the Wifi 7 Click board and used the code from the demo and it works perfectly (And no long cables strewn across the room :slight_smile: )

Getting back to the REST API code now.

wifi
wifi4608×3456 1.83 MB

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