ESP32 WiFi Scanner Using Wokwi Online Simulator

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:

1. Smart Home Automation System
2. IoT Weather Station with Cloud Integration
3. ESP32 Web Server for Remote Device Control
4. Bluetooth Low Energy (BLE) Beacon System
5. MQTT-Based Temperature & Humidity Monitor
6. ESP32-CAM Security Camera with Motion Detection
7. Smart Irrigation System with Soil Moisture Sensor
8. Voice-Controlled Home Assistant
9. IoT Energy Monitoring System
10. Smart Parking System Using Ultrasonic Sensors
11. Air Quality Monitor with IoT Dashboard
12. ESP32 Smart Doorbell with Notifications
13. IoT-Based Fire Detection & Alert System
14. How to Connect and Display Text on OLED Screen Using ESP32 – Complete Beginner Guide
15. Complete Guide: ESP32 Ultrasonic Distance Meter with LCD Display - Wokwi Simulator Tutorial