How do I get the available wifi APs and their signal strength in .net?

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Is there any way to access all WiFi access points and their respective RSSI values using .NET? It would be really nice if I could do it without using unmanaged code or even better if it worked in mono as well as .NET.

If it is possible i would appriciate a code sample. Thanks


Here are a few similiar stackoverflow questions i found:

-Get SSID of the wireless network I am connected to with C# .Net on Windows Vista

-Managing wireless network connection in C#

-Get BSSID (MAC address) of wireless access point from C#

It is a wrapper project with managed code in c# at http://www.codeplex.com/managedwifi

It supports Windows Vista and XP SP2 (or later version).

sample code:

using NativeWifi;
using System;
using System.Text;

namespace WifiExample
{
    class Program
    {
        /// <summary>
        /// Converts a 802.11 SSID to a string.
        /// </summary>
        static string GetStringForSSID(Wlan.Dot11Ssid ssid)
        {
            return Encoding.ASCII.GetString( ssid.SSID, 0, (int) ssid.SSIDLength );
        }

        static void Main( string[] args )
        {
            WlanClient client = new WlanClient();
            foreach ( WlanClient.WlanInterface wlanIface in client.Interfaces )
            {
                // Lists all networks with WEP security
                Wlan.WlanAvailableNetwork[] networks = wlanIface.GetAvailableNetworkList( 0 );
                foreach ( Wlan.WlanAvailableNetwork network in networks )
                {
                    if ( network.dot11DefaultCipherAlgorithm == Wlan.Dot11CipherAlgorithm.WEP )
                    {
                        Console.WriteLine( "Found WEP network with SSID {0}.", GetStringForSSID(network.dot11Ssid));
                    }
                }

                // Retrieves XML configurations of existing profiles.
                // This can assist you in constructing your own XML configuration
                // (that is, it will give you an example to follow).
                foreach ( Wlan.WlanProfileInfo profileInfo in wlanIface.GetProfiles() )
                {
                    string name = profileInfo.profileName; // this is typically the network's SSID

                    string xml = wlanIface.GetProfileXml( profileInfo.profileName );
                }

                // Connects to a known network with WEP security
                string profileName = "Cheesecake"; // this is also the SSID
                string mac = "52544131303235572D454137443638";
                string key = "hello";
                string profileXml = string.Format("<?xml version=\"1.0\"?><WLANProfile xmlns=\"http://www.microsoft.com/networking/WLAN/profile/v1\"><name>{0}</name><SSIDConfig><SSID><hex>{1}</hex><name>{0}</name></SSID></SSIDConfig><connectionType>ESS</connectionType><MSM><security><authEncryption><authentication>open</authentication><encryption>WEP</encryption><useOneX>false</useOneX></authEncryption><sharedKey><keyType>networkKey</keyType><protected>false</protected><keyMaterial>{2}</keyMaterial></sharedKey><keyIndex>0</keyIndex></security></MSM></WLANProfile>", profileName, mac, key);

                wlanIface.SetProfile( Wlan.WlanProfileFlags.AllUser, profileXml, true );
                wlanIface.Connect( Wlan.WlanConnectionMode.Profile, Wlan.Dot11BssType.Any, profileName );
            }
        }
    }
}

C#.net Get the Wifi and Signal strength, Your browser does not currently recognize any of the video formats available. Click here to Duration: 13:04 Posted: Apr 11, 2018 How do I get the available wifi APs and their signal strength in.net? (4) I found another way to do it, although it does cost some money. There is a .NET lib available at rawether.net that lets you get at the ethernet drivers.

Use Native Wifi APIs, present on all Vista and XP SP3 systems. XP SP2 has a different API with which you can do the same thing.

How to enumerate networks

How to get signal strength

WiFi Analysis Guide, The reason is that your wifi signal strength is constantly changing due to Like many other apps on this list, Wifi Analyzer is available in both a� Hi, I want to create a web application in which list of wifi network should appear and user can connect to any network by entering its password.

I am doing it running a command netsh wlan show networks mode=bssid from C# code.

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    class AccessPoint
    {
        public string SSID { get; set; }
        public string BSSID { get; set; }
        public byte Signal { get; set; }
    }

    class Program
    {
        private static async Task Main(string[] args)
        {
            var apList = await GetSignalOfNetworks();

            foreach (var ap in apList)
            {
                WriteLine($"{ap.BSSID} - {ap.Signal} - {ap.SSID}");
            }

            Console.ReadKey();
        }

        private static async Task<AccessPoint[]> GetSignalOfNetworks()
        {
            string result = await ExecuteProcessAsync(@"C:\Windows\System32\netsh.exe", "wlan show networks mode=bssid");

            return Regex.Split(result, @"[^B]SSID \d+").Skip(1).SelectMany(network => GetAccessPointFromNetwork(network)).ToArray();
        }

        private static AccessPoint[] GetAccessPointFromNetwork(string network)
        {
            string withoutLineBreaks = Regex.Replace(network, @"[\r\n]+", " ").Trim();
            string ssid = Regex.Replace(withoutLineBreaks, @"^:\s+(\S+).*$", "$1").Trim();

            return Regex.Split(withoutLineBreaks, @"\s{4}BSSID \d+").Skip(1).Select(ap => GetAccessPoint(ssid, ap)).ToArray();
        }

        private static AccessPoint GetAccessPoint(string ssid, string ap)
        {
            string withoutLineBreaks = Regex.Replace(ap, @"[\r\n]+", " ").Trim();
            string bssid = Regex.Replace(withoutLineBreaks, @"^:\s+([a-f0-9]{2}(:[a-f0-9]{2}){5}).*$", "$1").Trim();
            byte signal = byte.Parse(Regex.Replace(withoutLineBreaks, @"^.*(Signal|Sinal)\s+:\s+(\d+)%.*$", "$2").Trim());

            return new AccessPoint
            {
                SSID = ssid,
                BSSID = bssid,
                Signal = signal,
            };
        }

        private static async Task<string> ExecuteProcessAsync(string cmd, string args = null)
        {
            var process = new Process()
            {
                StartInfo = new ProcessStartInfo
                {
                    FileName = cmd,
                    Arguments = args,
                    RedirectStandardInput = false,
                    RedirectStandardOutput = true,
                    RedirectStandardError = true,
                    UseShellExecute = false,
                    CreateNoWindow = true,
                    StandardOutputEncoding = Encoding.UTF8,
                }
            };

            process.Start();

            string result = await process.StandardOutput.ReadToEndAsync();

            process.WaitForExit();

#if DEBUG
            if (result.Trim().Contains("The Wireless AutoConfig Service (wlansvc) is not running."))
            {
                return await GetFakeData();
            }
#endif

            return result;
        }

        private static async Task<string> GetFakeData()
        {
            var assembly = Assembly.GetExecutingAssembly();
            var resourceName = "ConsoleApp2.FakeData.txt";

            using (Stream stream = assembly.GetManifestResourceStream(resourceName))
            using (StreamReader reader = new StreamReader(stream))
            {
                return await reader.ReadToEndAsync();
            }
        }

        private static void WriteLine(string str)
        {
            Console.WriteLine(str);
        }
    }
}

Monitor APs and wifi clients on selected channel (Monitor Mode , Windows tool that captures wifi traffic on the channel you choose in monitor mode , and displays extensive This means that if your network card doesn't support ' Monitor Mode', you can still monitor your own network RSSI: Specifies the signal strength, in dBm. WifiChannelMonitor is also available in other languages. How do I get a consistent byte representation of strings in C# without manually specifying an encoding? How do I get the available wifi APs and their signal strength in.net? Get int value from enum in C# ; Reading settings from app.config or web.config in.net

You might be able to achieve it using WMI queries. Take a look at this thread.

WifiInfoView - WiFi Scanner for Windows 10/7/8/Vista, Scans wireless networks in your area and displays extensive information, including: Added 'Channel Utilization' column (Available only for APs with 'BSS Load' The received signal strength indicator value, in units of decibels referenced to� On Android, you’ll stay on your current network until the signal dies completely, and even after your signal dies, you won’t necessarily get switched to the next best WiFi broadcast.

If you are using vista wmi does not work with all network adapters, another alternative for vista is to use the netsh command. Have a look at this codeproject article.

Check the best WiFi analyzer apps for Android, A well-optimized WiFi network is essential for making the most out of your Internet We have selected six WiFi analyzer apps for Android to save you the time that you Among the main features of Network Signal Info is accurate signal strength maximum Wi-Fi speed, IP address, external IP address, net capability, net� How do I get the available wifi APs and their signal strength in .net? 6. How can someone get the BSSID of a router without connecting to it? 0.

NetSurveyor 802.11 Network Discovery Tool, Reporting the presence of WiFi networks and local access points and the signal strengths of their beacons; Conducting wireless site surveys where the installer is � You may be able to find many third-party tools, but Windows 10 includes several ways to check the signal strength of a wireless connection from the taskbar and using the Settings app, Control

android.net.wifi.WifiManager, Activity Action: Pick a Wi-Fi network to connect to. This constant was deprecated in API level 28. This is no longer supported. String � EXTRA_BSSID An access point scan has completed, and results are available. in API level 26. There is no need to call this method - addNetwork(android.net.wifi. WiFi signal strength is measured in milliwatts but as that measurement can get a bit complex with very large, confusing numbers. We instead elect to use dBm (decibels relative to a milliwatt). A high dBm is -30 and this would translate to excellent signal strength, while a low dBM is -120 which is essentially a dead zone.

Wi-Fi Signal Strength: What Is a Good Signal And How Do You , Here is a quick overview of the required Wi-Fi signal strength for different On the list of available networks, find the name of the network you are sent from your access point, by replacing the antenna, building your own� And is their any relationship with the signal strength in dBm? If so, how can I convert it to signal strength in dBm? Or any other way to list the available WiFi APs along with their signal strength in dBm. My code requires me to print this output as a table where column 1 is the ssid and the second column is its signal strength.

Comments
  • Thank you for this. But it's not working for me. I'm using windows 8.1 and I'm getting this exception "An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in ManagedWifi.dll". Any idea?
  • I am too getting thiis error in one of my machines though I am running it on windows 10 and VS 2015. Any clues ? were you able to sort it out ?
  • signal strength can not be used in windows XP. not even with every SP :(
  • thx for the link. the problem with netsh is that it doesnt give me all the information i need (rssi) and is kind of buggy sometimes