Getting Started with ESP32: A Beginner's Guide

The ESP32 is one of the most versatile microcontrollers available today. With built-in WiFi and Bluetooth, it's the perfect starting point for IoT projects.

What You'll Need

• ESP32 DevKit v1 (available at Proto.supply)
• USB-C cable
• Arduino IDE 2.x
• A computer running Windows, macOS, or Linux

Step 1: Install Arduino IDE

Download the latest Arduino IDE from the official website. Version 2.x includes a modern editor with autocomplete, which makes working with ESP32 libraries much easier.

Step 2: Add ESP32 Board Support

Open File → Preferences and add this URL to the "Additional Board Manager URLs" field:

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

Then go to Tools → Board → Board Manager, search for "esp32", and install the package by Espressif Systems.

Step 3: Your First Sketch

Let's start with the classic blink sketch, but we'll add a WiFi scan to prove the wireless hardware works:

#include <WiFi.h>

void setup() {
  Serial.begin(115200);
  pinMode(2, OUTPUT);  // Built-in LED on most ESP32 boards

  // Scan for WiFi networks
  Serial.println("Scanning for WiFi networks...");
  int n = WiFi.scanNetworks();
  Serial.printf("Found %d networks\n", n);
  for (int i = 0; i < n; i++) {
    Serial.printf("  %s (%d dBm)\n", WiFi.SSID(i).c_str(), WiFi.RSSI(i));
  }
}

void loop() {
  digitalWrite(2, HIGH);
  delay(500);
  digitalWrite(2, LOW);
  delay(500);
}

What's Next?

Once you've confirmed the basics work, try connecting to your home WiFi and serving a simple web page. The ESP32's dual-core processor can handle a lightweight HTTP server while still reading sensors — making it ideal for home automation dashboards.