Seems You are first person to use static IP in Wifi client mode.
after WifiNetworkHelper.ConnectFixAddress(......)
ni.IPv4Address[0] returns/holds desired IP address, but actual IP address assigned by router's DHCP.

tested on target: ESP_PSRAM_REV0 FW: 1.8.0.291

caught same bug ESP32_REV0 FW: 1.8.0.431

Question from Stackoverflow

So I've been doing some investigation and flashed an ESP32 (REV0) with the latest firmware.

The configuration is properly stored:

It does connect properly, I tried different scenarios:

• First time connection with a fully mass erased flash
• Second and third connection after a successful connection

I've been trying as well non proper connection, in those cases, as expected all goes wrong, you can't connect.

I've been trying the sample https://github.com/nanoframework/Samples/blob/main/samples/HTTP/HttpWebRequest/Program.cs and it works just fine.

The issue is with setting the static IP on the ESP32, where the router is not having a DHCP server running. I will not connect in my case. When you have a DHCP server running on the Router/Gateway the ESP32 will be provisioned with it. So the static IP that you have provisioned in ESP32 is not used at all, the static IP will show in ESP32.

One way to test it is to ping the ESP32 static IP and I am sure you will get time out and also check with DHCP server it will show that it has provisioned with a Dynamic IP to ESP32.

I searched through espressif documentation, and found, that

esp_netif_set_ip_info used only one time here — https://github.com/nanoframework/nf-interpreter/blob/31224a304d1fe887e4f700c07287f8af524dc803/targets/ESP32/_Network/NF_ESP32_Wireless.cpp#L389

So I searched, how to disable DHCP client, and found

Then searched through nf-interpreter repo and found nothing

So, static IP not implemented properly, I think.

Hope this information helps someone, because I'm not c++ programmer and can't handle with it myself

using nanoFramework.Networking;
using System.Threading;

    public class Program
    {
        public static void Main()
        {
            // connecting to wifi ap
            bool connected;
            do
            {
                WifiNetworkHelper.SetupNetworkHelper("SSID", "PWD");
                WifiNetworkHelper.NetworkReady.WaitOne();
                connected = WifiNetworkHelper.ConnectFixAddress("SSID", "PWD", new IPConfiguration("192.168.45.115", "255.255.255.0", "192.168.45.1"));
            } while (!connected);

            Thread.Sleep(Timeout.Infinite);
        }
    }

With this simple code and DHCP server in local network I have unpredictable result. Sometimes ESP32 gets IP from DHCP, sometimes static IP. I have to ping static IP from my PC and reboot board several time, to catch a moment, when static IP assigned.

@cbagpipe what you are doing is not really a good way. Why would you first connect with DHCP and then with a static address?

You should just use connected = WifiNetworkHelper.ConnectFixAddress("SSID", "PWD", new IPConfiguration("192.168.45.115", "255.255.255.0", "192.168.45.1")); and not the 2 previous lines. Than it will work as expected.

@Ellerbach ok... I thought WifiNetworkHelper.SetupNetworkHelper does some initialization without connecting, because we have WifiNetworkHelper.ConnectDhcp.

I thought WifiNetworkHelper.SetupNetworkHelper does some initialization without connecting, because we have WifiNetworkHelper.ConnectDhcp.

It does actually connect and setup everything :-) See: https://github.com/nanoframework/System.Device.Wifi/blob/6767df36c7dfd44caf651f21b52f616d57b3f33c/System.Device.Wifi/NetworkHelper/WifiNetworkHelper.cs#L65
To me, the intellisense comment seems very clear as well.

@cbagpipe what you are doing is not really a good way. Why would you first connect with DHCP and then with a static address?

You should just use connected = WifiNetworkHelper.ConnectFixAddress("SSID", "PWD", new IPConfiguration("192.168.45.115", "255.255.255.0", "192.168.45.1")); and not the 2 previous lines. Than it will work as expected.

After doing that my ESP32 not getting static IP anymore. Only DHCP one.

@cbagpipe thanks for the investigation. So definitely something to adjust on the native side.

@alberk8 , Please can you see if this is now working.

@alberk8 , Please can you see if this is now working.

Tested with latest firmware and still not working with static IP with WiFi. It is still getting DHCP IP from my router.

This has been an issue since the IDF changed from TCPIP adapters to the ESP_NETIF interface.
The problem is the ESP_NETIF starts the DHCP when the WIFI connects overriding the static IP settings.

Some work needs to be done to make sure all areas are compatible with ESP_NETIF working.

• When configuring Wifi STA on start make sure DHCP is disabled if config is for static
• When config is changed from managed app make sure ESP_NETIF is also updated.

By enabling staticipV4, it worked for me:

IPConfiguration IPConfiguration = new IPConfiguration("192.168.31.147", "255.255.255.0", "192.168.31.1", new string[] {"8.8.8.8"});

// 0 was the index of the interface I wanted to connect to

 NetworkInterface.GetAllNetworkInterfaces()[0].EnableStaticIPv4(IPConfiguration.IPAddress, IPConfiguration.IPSubnetMask, IPConfiguration.IPGatewayAddress);
success = WifiNetworkHelper.ConnectFixAddress(MySsid, MyPassword, IPConfiguration, token: cs.Token);

@AdrianSoundy is this completed now?

@AdrianSoundy is this completed now?

No it wasn't completed. The changes have been made but the testing wasn't completed. I'll raise a PR for changes and see if we can get this tested. @alberk8 Are you able to test this ?

@AdrianSoundy is this completed now?

No it wasn't completed. The changes have been made but the testing wasn't completed. I'll raise a PR for changes and see if we can get this tested. @alberk8 Are you able to test this ?

I will try to test this over the week end.