Documentation

// ESP32-S3 DevKitC-1 onboard RGB LED (WS2812 on GPIO38).
// Install "Adafruit NeoPixel" from Library Manager.

#include <Adafruit_NeoPixel.h>

#define LED_PIN   38
#define NUM_LEDS  1

Adafruit_NeoPixel led(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  led.begin();
  led.setBrightness(40);
  led.show();
}

void loop() {
  led.setPixelColor(0, led.Color(255, 0, 0)); led.show(); delay(500);
  led.setPixelColor(0, led.Color(0, 255, 0)); led.show(); delay(500);
  led.setPixelColor(0, led.Color(0, 0, 255)); led.show(); delay(500);
}

#include <WiFi.h>

const char* ssid     = "YOUR_WIFI_SSID";
const char* password = "YOUR_WIFI_PASSWORD";

void setup() {
  Serial.begin(115200);
  delay(500);
  Serial.println("Connecting to WiFi...");

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println();
  Serial.print("Connected! IP: ");
  Serial.println(WiFi.localIP());
  Serial.print("RSSI: ");
  Serial.println(WiFi.RSSI());
}

void loop() { }

#include <Wire.h>

#define SDA_PIN 8
#define SCL_PIN 9

void setup() {
  Serial.begin(115200);
  Wire.begin(SDA_PIN, SCL_PIN);
  delay(500);
  Serial.println("I2C Scanner starting...");
}

void loop() {
  byte count = 0;
  for (byte addr = 1; addr < 127; addr++) {
    Wire.beginTransmission(addr);
    if (Wire.endTransmission() == 0) {
      Serial.print("Found device at 0x");
      if (addr < 16) Serial.print("0");
      Serial.println(addr, HEX);
      count++;
    }
  }
  Serial.print("Total: "); Serial.println(count);
  delay(3000);
}

// The ESP32-S3 has 14 touch-capable pins: T1-T14 (GPIO1 - GPIO14).
// Touch a wire connected to the pin to see the value change.

#define TOUCH_PIN T1   // GPIO1

void setup() {
  Serial.begin(115200);
}

void loop() {
  uint32_t value = touchRead(TOUCH_PIN);
  Serial.print("Touch value: ");
  Serial.println(value);
  if (value > 30000) Serial.println("Touched!");
  delay(200);
}