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Introduction to ESP32 and Wi-Fi | NexaLearn IoT Lab | NexaLearn

Internet of Things (IoT)30 دقيقة

Introduction to ESP32 and Wi-Fi

Take your projects online. What is ESP32 and how do we set it up in the Arduino IDE?

Lesson Content

The ESP32 board is 10x more powerful than Arduino Uno, has built-in Bluetooth and Wi-Fi, and operates at 3.3V. To program it with Arduino IDE, we need to add the Espressif board manager URL, then install the ESP32 package. After that we can use the WiFi.h library to connect to a network.

Components Needed

لوحة ESP32كابل Micro-USB أو Type-C

Wiring Notes

The board operates at 3.3V. Never directly connect a 5V sensor output to ESP32 pins without using a voltage divider.

Code Example

#include <WiFi.h>
const char* ssid = "Your_SSID";
const char* password = "Your_PASSWORD";

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500); Serial.print(".");
  }
  Serial.println("\nConnected!");
  Serial.print("IP: "); Serial.println(WiFi.localIP());
}
void loop() {}

Common Mistakes

Selecting the wrong board (like Arduino Uno) when uploading to ESP32. You must select 'DOIT ESP32 DEVKIT V1' or the model matching your board.

Try in Simulator

Open in Wokwi Simulator

Next Lesson

Fetching Data from the Internet (HTTP GET)