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Getting Started with ESP32 / ESP8266

What is ESP32​

ESP32 is a low-cost microcontroller with built-in WiFi and Bluetooth. Use it for IoT sensor nodes, LoRa gateways, smart home devices, and battery-powered projects.

Prerequisites​

  • ESP32 dev board (ESP32-WROOM, ESP32-S3, etc.)
  • USB cable (data-capable)
  • Computer with Arduino IDE or PlatformIO

Install — Arduino IDE​

  1. Open Arduino IDE → File → Preferences
  2. Add board URL: https://espressif.github.io/arduino-esp32/package_esp32_index.json
  3. Tools → Board → Boards Manager → install esp32 by Espressif
  4. Select board: Tools → Board → ESP32 Dev Module

First Example: WiFi Scan​

#include <WiFi.h>
void setup() { Serial.begin(115200); WiFi.mode(WIFI_STA); }
void loop() {
  int n = WiFi.scanNetworks();
  for (int i = 0; i < n; i++) Serial.println(WiFi.SSID(i));
  delay(5000);
}