ESP32 WiFi Scanner Using Wokwi Online Simulator

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This project demonstrates how to scan for available WiFi networks using an ESP32 microcontroller. We'll use the Wokwi online simulator, so you don't need any physical hardware to get started!


📡

Network Scanning

Detect nearby WiFi networks

📊

Signal Strength

View RSSI values

🔒

Security Detection

Identify encryption types

🌐

No Hardware Needed

Runs in Wokwi simulator

What is Wokwi?

Wokwi is a free online simulator for Arduino, ESP32, and other microcontrollers. It allows you to:

  • Write and test code without physical hardware
  • Simulate WiFi, sensors, and other components
  • Share projects with a simple link
  • Debug code in real-time
  • Learn electronics safely

Expected Output

WiFi Scanner Starting... Scan starting... Scan complete! Found 3 networks: 1: Wokwi-GUEST (Open) Signal: -42 dBm ▂▄▆█ Channel: 6 2: MyHomeNetwork (WPA2) Signal: -67 dBm ▂▄__ Channel: 11 3: Office-5G (WPA2) Signal: -78 dBm ▂___ Channel: 1 ------------------------------------ Scanning again in 5 seconds...


CODE:

 /* ESP32 WiFi Scanning example */


#include "WiFi.h"

void setup() {
  Serial.begin(115200);
  Serial.println("Initializing WiFi...");
  WiFi.mode(WIFI_STA);
  Serial.println("Setup done!");
}

void loop() {
  Serial.println("Scanning...");

  // WiFi.scanNetworks will return the number of networks found
  int n = WiFi.scanNetworks();
  Serial.println("Scan done!");
  if (n == 0) {
    Serial.println("No networks found.");
  } else {
    Serial.println();
    Serial.print(n);
    Serial.println(" networks found");
    for (int i = 0; i < n; ++i) {
      // Print SSID and RSSI for each network found
      Serial.print(i + 1);
      Serial.print(": ");
      Serial.print(WiFi.SSID(i));
      Serial.print(" (");
      Serial.print(WiFi.RSSI(i));
      Serial.print(")");
      Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN) ? " " : "*");
      delay(10);
    }
  }
  Serial.println("");

  // Wait a bit before scanning again
  delay(5000);
}


ESP 32 BASED PROJECTS:

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