#include <WiFi.h>
#include <WebServer.h>

// Connect to ESP32 via browser after connecting to the same WiFi
// Try: http://<ESP32-IP>/status

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

WebServer server(80);			// Start webserver on port 80

const int ledPin = 2;

void flashLED() {				// to signal ESP32 is receiving a request
  digitalWrite(ledPin, HIGH);  	// Turn LED on
  delay(100);                  	// Wait 100ms
  digitalWrite(ledPin, LOW); 	// Turn LED off
}

void handleStatus() {			// sample call to check it's working
  flashLED();
  String response = "ESP32 is alive and connected. ";
  server.send(200, "text/plain", response);
}

void handleHTTP() {   			// handles invalid requests
  flashLED();
  String path = server.uri();
  String message = "Not a valid call for " + path;
  server.send(404, "text/plain", message);
}

void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);

  WiFi.begin(ssid, password);

  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
	flashLED();  // flash while connecting
	delay(500);
	Serial.print(".");
  }

  Serial.println("\nConnected to WiFi.");
  Serial.print("ESP32 IP address: ");
  Serial.println(WiFi.localIP());

// processes must be defined first - case sensitive parameters
  server.on("/status", handleStatus);  // Restful api call - http://192.168.1.123/status
  server.onNotFound(handleHTTP);       // Catch all others

  server.begin();
}

void loop() {
  server.handleClient();  		// Must be called regularly
}