Today I tried out the ESP32 for the first time. I managed to attach a PIR Sensor-Module and an LED to the ESP32. The LED lights up as soon as the PIR Sensor-Module recognizes something is moving. I also got the ESP32 to connect to a WiFi Network.

First, I started with the obligatory "Hello World" 

void setup() {
// Set the Serial Monitor to 115200!
Serial.begin(115200);
}

void loop() {
  Serial.println("Hello from ESP32");
  delay(1000);
}

PIR Sensor-Module

After that I attached the PIR Sensor-Module and the LED:

Then I programmed it to turn on the LED when the PIR Sensor Module recognizes something moving: 

int ledPin = 14;
int sensorPin = 27;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(sensorPin, INPUT);
}

void loop() {
  int sensorValue = digitalRead(sensorPin);

  if (sensorValue == HIGH) {
    digitalWrite(ledPin, HIGH); // Turning on LED if the Sensor is "HIGH"
  }
  else {
    digitalWrite(ledPin, LOW); // Turning off LED if the Sensor is "LOW"
  }
}

Connecting to WiFi

I also managed to connect the ESP32 to a Wifi-Network: 

// Connecting an ESP32 to a WiFi Network
#include <WiFi.h>

// Entering network credentials
const char* ssid = "SSID";
const char* password = "PASS";

void setup(){

  Serial.begin(115200); // You need this Value to find out ESP32's Local IP-Address.

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.println("\nConnecting to WiFi Network ..");

  while(WiFi.status() != WL_CONNECTED){
      Serial.print(".");
      delay(100);
  }

  Serial.println("\nConnected to the WiFi network");
  Serial.print("Local IP: ");
  Serial.println(WiFi.localIP());
}

void loop(){
  // Nothing yet...
}