Harnessing WiFi Capabilities on ESP32 with C#: A Practical Guide

Harnessing WiFi Capabilities on ESP32 with C#: A Practical Guide


Incorporating WiFi connectivity into IoT projects can significantly expand their capabilities. With the ESP32 microcontroller and the nanoFramework, you can now achieve this using C#, a language familiar to many developers.

This blog post provides a hands-on guide to using C# on an ESP32 device for connecting to WiFi networks, complete with code examples.

Why C# and ESP32 for WiFi Projects?

C# brings object-oriented capabilities, robust error handling, and a rich set of libraries, making it a strong candidate for developing complex IoT applications.

When combined with the WiFi capabilities of the ESP32, it opens up a realm of possibilities in areas like home automation, environmental monitoring, and more.

Setting Up Your Development Environment

Before diving into the code, ensure you have:

  1. An ESP32 board flashed with nanoFramework firmware.
  2. Visual Studio with the nanoFramework extension installed.

Writing the C# Code for WiFi Connectivity

Step 1: Setting Up the Project

Create a new nanoFramework project in Visual Studio:

  1. Open Visual Studio.
  2. Go to File > New > Project.
  3. Select nanoFramework as the project type.
  4. Name your project, for example, “ESP32WiFiConnect”.

Step 2: Writing the WiFi Connection Code

In your project, write the following C# code to connect your ESP32 to a WiFi network:

using System
using System.Threading
using System.Device.WiFi

namespace ESP32WiFiConnect 

    public class Program 

        public static void Main() 


            catch (Exception ex) 
                Console.WriteLine($"Error: {ex.Message}"); 
        private static void ConnectToWiFi(string ssidstring password
            Console.WriteLine("Initializing WiFi adapter..."); 
            WiFiAdapter wifi = WiFiAdapter.FindAllAdapters()[0]; 
            Console.WriteLine($"Attempting to connect to {ssid}..."); 
            WiFiConnectionResult result = wifi.Connect(ssid, password); 
            if(result.ConnectionStatus == WiFiConnectionStatus.Success) 
                Console.WriteLine("Connected to WiFi network successfully."); 

                Console.WriteLine($"Failed to connect to WiFi. Status: {result.ConnectionStatus}"); 

Replace "your_ssid" and "your_password" with the SSID and password of your WiFi network.

Step 3: Deploying the Code

  1. Connect your ESP32 board to your computer via USB.
  2. In Visual Studio, select your connected ESP32 device as the target device.
  3. Deploy the application to your ESP32 by pressing F5 or clicking the “Start Debugging” button.

Once deployed, your ESP32 should attempt to connect to the specified WiFi network.

Best Practices and Troubleshooting

  1. Accurate WiFi Credentials: Double-check your network SSID and password.
  2. Stable Power Supply: Ensure your ESP32 is adequately powered, especially during WiFi operations.
  3. Error Handling: Make use of try-catch blocks to handle potential exceptions.
  4. Serial Debugging: Utilize serial output for debugging messages and monitoring the connection process.
  5. Firmware Updates: Keep the nanoFramework firmware on your ESP32 up to date.


Using C# on an ESP32 for WiFi connectivity blends the advanced features of a high-level language with the practicality of an IoT-centric microcontroller.

This approach simplifies the development process, making it more accessible and efficient, especially for those already versed in C#.

Whether for personal projects or professional IoT solutions, leveraging C# on ESP32 for WiFi-related tasks offers a powerful and versatile platform for innovation and creativity in the IoT space.


Hi, my name is Stephen Finchett. I have been a software engineer for over 30 years and worked on complex, business critical, multi-user systems for all of my career. For the last 15 years, I have been concentrating on web based solutions using the Microsoft Stack including ASP.Net, C#, TypeScript, SQL Server and running everything at scale within Kubernetes.