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

const char *ssid = "SSID";
const char *pass = "PASSWORD";

IPAddress myIP(192, 168, 0, 40);  //static ip address
WebServer server(80);

static int note = 0;

void loop1() { //core1
  delay(100);
  if (note) {
    tone(8, note);
  } else {
    noTone(8);
  }
}

void handleRoot() {
  Serial.print("handleRoot...");
  note = 1000;
  while (digitalRead(21)) delay(10); // SW4
  note = 0;
  server.send(200, "text/HTML", "OK\r\n");
  Serial.println("exited");
}

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

  pinMode(20, INPUT_PULLUP);  //sw3
  pinMode(21, INPUT_PULLUP);  //sw4

  pinMode(8, OUTPUT);  //buzzer

  WiFi.disconnect(true);
  delay(500);

  WiFi.mode(WIFI_STA);
  WiFi.config(myIP);  // set ip address
  WiFi.begin(ssid, pass);
  Serial.print("WiFi connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected.");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  server.on("/", handleRoot);

  server.begin();
  Serial.println("HTTP server started.");

  note = 600;
  delay(500);
  note = 0;
}

void loop() {
  if (!digitalRead(20)) {  // SW3
    note = 1000;
    delay(500);
    note = 0;
  }

  server.handleClient();
  delay(10);
}