Challenge 2: Wearable Technology - másemote smart mask

#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ArduinoOTA.h>
#include "images.h"

// For a connection via I2C using the Arduino Wire include:
#include <Wire.h>               // Only needed for Arduino 1.6.5 and earlier
//#include "SSD1306Wire.h"        // legacy: #include "SSD1306.h"
#include "SH1106Wire.h"   // legacy: #include "SH1106.h"



#ifndef STASSID
#define STASSID "XXXXXXX"
#define STAPSK  "XXXXXXX"

#endif

const int led = 13;
const char* ssid = STASSID;
const char* password = STAPSK;

// defines pins numbers
const int trigPin = 2;  //D4
const int echoPin = 0;  //D3
const int buzzerPin = 13; //D7

// defines variables
long duration;
int distance;


SH1106Wire display(0x3c, SDA, SCL);     // ADDRESS, SDA, SCL

void setup() {
  Serial.begin(9600);
  Serial.println();
  pinMode(buzzerPin, OUTPUT);
  digitalWrite(buzzerPin, LOW); 
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input

  // Initialising the UI will init the display too.
  display.init();

  display.setFont(ArialMT_Plain_10);
  Serial.println("Booting");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    Serial.println("Connection Failed! Rebooting...");
    delay(5000);
    ESP.restart();}


  ArduinoOTA.onStart([]() {
    String type;
    if (ArduinoOTA.getCommand() == U_FLASH) {
      type = "sketch";
    } else { // U_FS
      type = "filesystem";
    }

    // NOTE: if updating FS this would be the place to unmount FS using FS.end()
    Serial.println("Start updating " + type);
  });
  ArduinoOTA.onEnd([]() {
    Serial.println("\nEnd");
  });
  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
  });
  ArduinoOTA.onError([](ota_error_t error) {
    Serial.printf("Error[%u]: ", error);
    if (error == OTA_AUTH_ERROR) {
      Serial.println("Auth Failed");
    } else if (error == OTA_BEGIN_ERROR) {
      Serial.println("Begin Failed");
    } else if (error == OTA_CONNECT_ERROR) {
      Serial.println("Connect Failed");
    } else if (error == OTA_RECEIVE_ERROR) {
      Serial.println("Receive Failed");
    } else if (error == OTA_END_ERROR) {
      Serial.println("End Failed");
    }
  });
  ArduinoOTA.begin();
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  
}






void calcDistance(int delayTime) {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
  
  // Calculating the distance
  distance= duration*0.034/2;
  updateDisplay(distance);
  delay(delayTime);

}

void updateDisplay(int distance) {
      
  if (distance<50) {
      display.setFont(ArialMT_Plain_10);
      display.drawString(0, 0, "ACHTUNG GEFAHR");
         display.setFont(ArialMT_Plain_24);
      display.drawString(0, 26, String(distance) + " cm");
       display.drawXbm(70, 14, achtungBruderImg_width, achtungBruderImg_height, achtungBruderImg_bits);      
     buzzTheBuzzer(100,200);

  }else{
      display.setFont(ArialMT_Plain_10);
      display.drawString(0, 0, "Alles safe, Brudi:)");
          display.setFont(ArialMT_Plain_24);
      display.drawString(0, 26, String(distance) + " cm");
    }
   
  }

void buzzTheBuzzer(int buzzerDuration, int buzzerPause){
    
    tone(buzzerPin, 261);
    delay(buzzerDuration);
    noTone(buzzerPin);
    delay(buzzerPause);

    tone(buzzerPin, 293);
    delay(buzzerDuration);
    noTone(buzzerPin);
    delay(buzzerPause);

       tone(buzzerPin, 329);
    delay(buzzerDuration);
    noTone(buzzerPin);
    delay(buzzerPause);

    tone(buzzerPin, 349);
    delay(buzzerDuration);
    noTone(buzzerPin);
    delay(buzzerPause);


}

void loop() {
  ArduinoOTA.handle();
  display.display();
  display.clear();
  digitalWrite(buzzerPin, LOW); 

  calcDistance(2000);


}