# ESP32

const int ledPin =  2;                // GPIO pin led
void setup() {
  
  pinMode(ledPin, OUTPUT);     // initialize pin as an output.
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(ledPin, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(ledPin, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

unsigned long previousMillis = 0;       //laatste maal toestandsverandering
unsigned long currentMillis = 0;       //tijd sinds opstart arduino

boolean ledState = LOW;                // ledstatus

const long interval = 1000;           // interval in milliseconden
const int ledPin =  2;                // GPIO pin led

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

void loop() {
  currentMillis = millis();
  if ((currentMillis - previousMillis) >= interval) //wanneer verschil tussen laatste toestandsverandering en opstarttijd groter of gelijk is aan interval
  { ledState=!ledState;
    previousMillis = currentMillis;    //update previousMillis
    digitalWrite(ledPin,ledState);
    Serial.println(ledState);
  }

}

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

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

#define drukknopPin 4

boolean drukknopStatus;

void setup() {
 pinMode(drukknopPin, INPUT); // pin 4 als ingang plaatsen
 Serial.begin(115200);
}

void loop() {
  drukknopStatus = digitalRead(drukknopPin); //binnenlezen toestand ingang
  Serial.println(drukknopStatus);
}

# define ADCPin  38    // Analog input pin 
int ADCValue = 0;  // variable to store the value coming from the ADC

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

void loop() {
  ADCValue = analogRead(ADCPin);
  Serial.print("Analoge waarde: ");
  Serial.println (ADCValue);
  delay(100);
}

// the number of the LED pin
const int ledPin = 16;  // 16 corresponds to GPIO16

// setting PWM properties
const int freq = 5000;
const int ledChannel = 0;
const int resolution = 8;
 
void setup(){
  // configure LED PWM functionalitites
  ledcSetup(ledChannel, freq, resolution);
  
  // attach the channel to the GPIO to be controlled
  ledcAttachPin(ledPin, ledChannel);
}
 
void loop(){
  // increase the LED brightness
  for(int dutyCycle = 0; dutyCycle <= 255; dutyCycle++){   
    // changing the LED brightness with PWM
    ledcWrite(ledChannel, dutyCycle);
    delay(15);
  }

  // decrease the LED brightness
  for(int dutyCycle = 255; dutyCycle >= 0; dutyCycle--){
    // changing the LED brightness with PWM
    ledcWrite(ledChannel, dutyCycle);   
    delay(15);
  }
}

#define DAC1 25

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

void loop() { 
  int value = 255; 
  
  dacWrite(DAC1, value);
  delay(1000);
}

#define Num_Samples  112   //  number of dample of signal
#define MaxWaveTypes 4   // types of wave (signal)
#define DAC1 25
int i = 0;

static byte WaveFormTable[MaxWaveTypes][Num_Samples] = {
  // Sin wave
  {
    0x80, 0x83, 0x87, 0x8A, 0x8E, 0x91, 0x95, 0x98, 0x9B, 0x9E, 0xA2, 0xA5, 0xA7, 0xAA, 0xAD, 0xAF,
    0xB2, 0xB4, 0xB6, 0xB8, 0xB9, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xBF, 0xBF, 0xC0, 0xBF, 0xBF, 0xBF,
    0xBE, 0xBD, 0xBC, 0xBB, 0xB9, 0xB8, 0xB6, 0xB4, 0xB2, 0xAF, 0xAD, 0xAA, 0xA7, 0xA5, 0xA2, 0x9E,
    0x9B, 0x98, 0x95, 0x91, 0x8E, 0x8A, 0x87, 0x83, 0x80, 0x7C, 0x78, 0x75, 0x71, 0x6E, 0x6A, 0x67,
    0x64, 0x61, 0x5D, 0x5A, 0x58, 0x55, 0x52, 0x50, 0x4D, 0x4B, 0x49, 0x47, 0x46, 0x44, 0x43, 0x42,
    0x41, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x41, 0x42, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4B,
    0x4D, 0x50, 0x52, 0x55, 0x58, 0x5A, 0x5D, 0x61, 0x64, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C
  },
  // Triangular wave table
  {
    0x80, 0x84, 0x89, 0x8D, 0x92, 0x96, 0x9B, 0x9F, 0xA4, 0xA8, 0xAD, 0xB2, 0xB6, 0xBB, 0xBF, 0xC4,
    0xC8, 0xCD, 0xD1, 0xD6, 0xDB, 0xDF, 0xE4, 0xE8, 0xED, 0xF1, 0xF6, 0xFA, 0xFF, 0xFA, 0xF6, 0xF1,
    0xED, 0xE8, 0xE4, 0xDF, 0xDB, 0xD6, 0xD1, 0xCD, 0xC8, 0xC4, 0xBF, 0xBB, 0xB6, 0xB2, 0xAD, 0xA8,
    0xA4, 0x9F, 0x9B, 0x96, 0x92, 0x8D, 0x89, 0x84, 0x7F, 0x7B, 0x76, 0x72, 0x6D, 0x69, 0x64, 0x60,
    0x5B, 0x57, 0x52, 0x4D, 0x49, 0x44, 0x40, 0x3B, 0x37, 0x32, 0x2E, 0x29, 0x24, 0x20, 0x1B, 0x17,
    0x12, 0x0E, 0x09, 0x05, 0x00, 0x05, 0x09, 0x0E, 0x12, 0x17, 0x1B, 0x20, 0x24, 0x29, 0x2E, 0x32,
    0x37, 0x3B, 0x40, 0x44, 0x49, 0x4D, 0x52, 0x57, 0x5B, 0x60, 0x64, 0x69, 0x6D, 0x72, 0x76, 0x7B
  },

  // Sawtooth wave table
  {
    0x00, 0x02, 0x04, 0x06, 0x09, 0x0B, 0x0D, 0x10, 0x12, 0x14, 0x16, 0x19, 0x1B, 0x1D, 0x20, 0x22,
    0x24, 0x27, 0x29, 0x2B, 0x2D, 0x30, 0x32, 0x34, 0x37, 0x39, 0x3B, 0x3E, 0x40, 0x42, 0x44, 0x47,
    0x49, 0x4B, 0x4E, 0x50, 0x52, 0x54, 0x57, 0x59, 0x5B, 0x5E, 0x60, 0x62, 0x65, 0x67, 0x69, 0x6B,
    0x6E, 0x70, 0x72, 0x75, 0x77, 0x79, 0x7C, 0x7E, 0x80, 0x82, 0x85, 0x87, 0x89, 0x8C, 0x8E, 0x90,
    0x93, 0x95, 0x97, 0x99, 0x9C, 0x9E, 0xA0, 0xA3, 0xA5, 0xA7, 0xA9, 0xAC, 0xAE, 0xB0, 0xB3, 0xB5,
    0xB7, 0xBA, 0xBC, 0xBE, 0xC0, 0xC3, 0xC5, 0xC7, 0xCA, 0xCC, 0xCE, 0xD1, 0xD3, 0xD5, 0xD7, 0xDA,
    0xDC, 0xDE, 0xE1, 0xE3, 0xE5, 0xE8, 0xEA, 0xEC, 0xEE, 0xF1, 0xF3, 0xF5, 0xF8, 0xFA, 0xFC, 0xFE
  },
  // Square wave table
  {
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  }
};

void setup() {
  Serial.begin(115200);  // serial monitor at 115200 bps
}

void loop() {
  byte wave_type = 0; // Sine
  //byte wave_type = 1; // Triangle
  //byte wave_type = 2; // Sawtooth
  //byte wave_type = 3; // Square command
  
  dacWrite(DAC1, WaveFormTable[wave_type][i]);   //  output wave form
  i++;
  if (i >= Num_Samples)
  {
    i = 0;
  }
}

#include "DHT.h"
//here we use 14 of ESP32 to read data
#define DHTPIN 14
//our sensor is DHT11 type
#define DHTTYPE DHT11
//create an instance of DHT sensor
DHT dht(DHTPIN, DHTTYPE);
void setup()
{ Serial.begin(115200);
  Serial.println("DHT11 sensor!");
  //call begin to start sensor
  dht.begin();
}

void loop() {
  //use the functions which are supplied by library.
  float hum = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float temp = dht.readTemperature();
  // print the result to Terminal
  Serial.print("Humidity: ");
  Serial.print(hum);
  Serial.print(" \t");
  Serial.print("Temperature: ");
  Serial.print(temp);
  Serial.println(" *C ");
  delay(2000);
}

/*********
  Rui Santos
  Complete project details at https://randomnerdtutorials.com  
*********/

void setup() {
  Serial.begin(115200);
  Serial.print("setup() running on core ");
  Serial.println(xPortGetCoreID());
}

void loop() {
  Serial.print("loop() running on core ");
  Serial.println(xPortGetCoreID());
}

TaskHandle_t Task1;

xTaskCreatePinnedToCore(
      Task1code, /* Function to implement the task */
      "Task1", /* Name of the task */
      10000,  /* Stack size in words */
      NULL,  /* Task input parameter */
      0,  /* Priority of the task */
      &Task1,  /* Task handle. */
      0); /* Core where the task should run */

Void Task1code( void * parameter) {
  for(;;) {
    Code for task 1 - infinite loop
    (...)
  }
}

vTaskDelete(Task1);

/*********
  Rui Santos
  Complete project details at https://randomnerdtutorials.com  
*********/

TaskHandle_t Task1;
TaskHandle_t Task2;

// LED pins
const int led1 = 2;
const int led2 = 4;

void setup() {
  Serial.begin(115200); 
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);

  //create a task that will be executed in the Task1code() function, with priority 1 and executed on core 0
  xTaskCreatePinnedToCore(
                    Task1code,   /* Task function. */
                    "Task1",     /* name of task. */
                    10000,       /* Stack size of task */
                    NULL,        /* parameter of the task */
                    1,           /* priority of the task */
                    &Task1,      /* Task handle to keep track of created task */
                    0);          /* pin task to core 0 */                  
  delay(500); 

  //create a task that will be executed in the Task2code() function, with priority 1 and executed on core 1
  xTaskCreatePinnedToCore(
                    Task2code,   /* Task function. */
                    "Task2",     /* name of task. */
                    10000,       /* Stack size of task */
                    NULL,        /* parameter of the task */
                    1,           /* priority of the task */
                    &Task2,      /* Task handle to keep track of created task */
                    1);          /* pin task to core 1 */
    delay(500); 
}

//Task1code: blinks an LED every 1000 ms
void Task1code( void * pvParameters ){
  Serial.print("Task1 running on core ");
  Serial.println(xPortGetCoreID());

  for(;;){
    digitalWrite(led1, HIGH);
    delay(1000);
    digitalWrite(led1, LOW);
    delay(1000);
  } 
}

//Task2code: blinks an LED every 700 ms
void Task2code( void * pvParameters ){
  Serial.print("Task2 running on core ");
  Serial.println(xPortGetCoreID());

  for(;;){
    digitalWrite(led2, HIGH);
    delay(700);
    digitalWrite(led2, LOW);
    delay(700);
  }
}

void loop() {
  
}

#include <TFT_eSPI.h> // Graphics and font library for ST7735 driver chip
#include <SPI.h>

TFT_eSPI tft = TFT_eSPI();  // Invoke library, pins defined in User_Setup.h

#define TFT_GREY 0x5AEB // New colour

void setup(void) {
  tft.init();
  tft.setRotation(1);
}

void loop() {
  
  // Fill screen with grey so we can see the effect of printing with and without 
  // a background colour defined
  tft.fillScreen(TFT_GREY);
  
  // Set "cursor" at top left corner of display (0,0) and select font 2
  // (cursor will move to next line automatically during printing with 'tft.println'
  //  or stay on the line is there is room for the text with tft.print)
  tft.setCursor(0, 0, 2);
  // Set the font colour to be white with a black background, set text size multiplier to 1
  tft.setTextColor(TFT_WHITE,TFT_BLACK);  tft.setTextSize(1);
  // We can now plot text on screen using the "print" class
  tft.println("Hello World!");
  
  // Set the font colour to be yellow with no background, set to font 7
  tft.setTextColor(TFT_YELLOW); tft.setTextFont(2);
  tft.println(1234.56);
  
  // Set the font colour to be red with black background, set to font 4
  tft.setTextColor(TFT_RED,TFT_BLACK);    tft.setTextFont(4);
  tft.println((long)3735928559, HEX); // Should print DEADBEEF

  // Set the font colour to be green with black background, set to font 2
  tft.setTextColor(TFT_GREEN,TFT_BLACK);
  tft.setTextFont(2);
  tft.println("Groop");

  // Test some print formatting functions
  float fnumber = 123.45;
   // Set the font colour to be blue with no background, set to font 2
  tft.setTextColor(TFT_BLUE);    tft.setTextFont(2);
  tft.print("Float = "); tft.println(fnumber);           // Print floating point number
  tft.print("Binary = "); tft.println((int)fnumber, BIN); // Print as integer value in binary
  tft.print("Hexadecimal = "); tft.println((int)fnumber, HEX); // Print as integer number in Hexadecimal

  while(1) yield(); // We must yield() to stop a watchdog timeout.
}

#include <WiFi.h>

void setup(){
  Serial.begin(115200);
  Serial.println();
  Serial.print("ESP Board MAC Address:  ");
  Serial.println(WiFi.macAddress());
}

void loop(){
}

#include "WiFi.h"

void setup() {
  Serial.begin(115200);
  // Set WiFi to station mode and disconnect from an AP if it was previously connected
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);
  Serial.println("Setup done");
}

void loop() {
  Serial.println("scan start");
  // WiFi.scanNetworks will return the number of networks found
  int n = WiFi.scanNetworks();
  Serial.println("scan done");
  if (n == 0) {
    Serial.println("no networks found");
  } 
 else {
    Serial.print(n);
    Serial.println(" networks found");
    for (int i = 0; i < n; i++) {
      // Print SSID and RSSI for each network found
      Serial.print(i + 1);
      Serial.print(": ");
      Serial.print(WiFi.SSID(i));
      Serial.print(" (");
      Serial.print(WiFi.RSSI(i));
      Serial.println(")");
      delay(10);
    }
  }

  // Wait a bit before scanning again
  delay(5000);
}

#include <WiFi.h>

#define WIFI_SSID "SSID"  //SSID WPA2 personal wifi netwerk
#define WIFI_PSK "PASWOORD" // paswoord WPA2 personal wifi netwerk

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("WIFI:\tsetup");
  WiFi.mode(WIFI_STA); //Station mode
  Serial.print("\tconnecting ");
  WiFi.begin(WIFI_SSID, WIFI_PSK);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    Serial.print(".");
  }
  Serial.print("\n\tGot wireless IP: ");
  Serial.println(WiFi.localIP());
}

void loop() {
  // put your main code here, to run repeatedly:

}

#include <NTPClient.h>
#include <WiFi.h>
#include <WiFiUdp.h>

# define ssid "SSID"
# define password "PASSWORD"

const long utcOffsetInSeconds = 3600;

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

// Define NTP Client to get time
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  }
  timeClient.begin();
}

void loop() {
  timeClient.update();
  Serial.print(daysOfTheWeek[timeClient.getDay()]);
  Serial.print(", ");
  Serial.print(timeClient.getHours());
  Serial.print(":");
  Serial.print(timeClient.getMinutes());
  Serial.print(":");
  Serial.println(timeClient.getSeconds());
  delay(1000);
}

/*********
  Complete project details at http://randomnerdtutorials.com
*********/

// Load Wi-Fi library
#include <WiFi.h>

// Replace with your network credentials
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_SSID_PASSWORD";

// Set web server port number to 80
WiFiServer server(80);

// Variable to store the HTTP request
String header;

// Current time
unsigned long currentTime = millis();
// Previous time
unsigned long previousTime = 0;
// Define timeout time in milliseconds (example: 2000ms = 2s)
const long timeoutTime = 2000;

void setup() {
  Serial.begin(115200);
  // Connect to Wi-Fi network with SSID and password
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // Print local IP address and start web server
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  server.begin();
}

void loop() {
  WiFiClient client = server.available();   // Listen for incoming clients

  if (client) {                             // If a new client connects,
    currentTime = millis();
    previousTime = currentTime;
    Serial.println("New Client.");          // print a message out in the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected() && currentTime - previousTime <= timeoutTime) {  // loop while the client's connected
      currentTime = millis();
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        header += c;
        if (c == '\n') {                    // if the byte is a newline character
          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println();


            // Display the HTML web page
            client.println("<!DOCTYPE html>");
            // Web Page Heading
            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
            client.println("<meta http-equiv=\"refresh\" content=\"10\">");
            client.println("<title>ESP32 Webpagina</title>");
            client.println("</head>");
            // Web Page body
            client.println("<body><h1>ESP32 Web Server</h1>");
            client.println("<p>Een tekst</p>");
            client.println("</body></html>");

            // The HTTP response ends with another blank line
            client.println();
            // Break out of the while loop
            break;
          }
          else { // if you got a newline, then clear currentLine
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }
      }
    }
    // Clear the header variable
    header = "";
    // Close the connection
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }
}

while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

Serial.println("WiFi connected.");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());

WiFiServer server(80);

if (client.available()) {                   // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        header += c;

\n

if (c == '\n') { 

client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println("Connection: close");
client.println();

client.println("<!DOCTYPE html>");
// Web Page Heading
client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
client.println("<title>ESP32 Webpagina</title>");
 client.println("</head>");
// Web Page body
client.println("<body><h1>ESP32 Web Server</h1>");
client.println("<p>Een tekst</p>");
client.println("</body></html>");

// Load Wi-Fi library
#include <WiFi.h>

// Replace with your network credentials
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_SSID_PASSWORD";

// Set web server port number to 80
WiFiServer server(80);

// Variable to store the HTTP request
String header;

// Auxiliar variable to store the current output state
String outputLedState = "off";


// Assign output variable to GPIO pins
const int outputLed = LED_BUILTIN;

// Current time
unsigned long currentTime = millis();
// Previous time
unsigned long previousTime = 0; 
// Define timeout time in milliseconds (example: 2000ms = 2s)
const long timeoutTime = 2000;

void setup() {
  Serial.begin(115200);
  // Initialize the output variable as output
  pinMode(outputLed, OUTPUT);

  // Set output to LOW
  digitalWrite(outputLed, LOW);
 
  // Connect to Wi-Fi network with SSID and password
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // Print local IP address and start web server
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  server.begin();
}

void loop(){
  WiFiClient client = server.available();   // Listen for incoming clients

  if (client) {                             // If a new client connects,
    currentTime = millis();
    previousTime = currentTime;
    Serial.println("New Client.");          // print a message out in the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected() && currentTime - previousTime <= timeoutTime) {  // loop while the client's connected
      currentTime = millis();
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        header += c;
        if (c == '\n') {                    // if the byte is a newline character
          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println();
            
            // turns the GPIOs on and off
            if (header.indexOf("GET /on") >= 0) {
              Serial.println("Builtin led on");
              outputLedState = "on";
              digitalWrite(outputLed, HIGH);
            } else if (header.indexOf("GET /off") >= 0) {
              Serial.println("Builtin led off");
              outputLedState = "off";
              digitalWrite(outputLed, LOW);
            } 
            
            // Display the HTML web page
            client.println("<!DOCTYPE html><html>");
            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
            client.println("<link rel=\"icon\" href=\"data:,\">");
            // CSS to style the on/off buttons 
            // Feel free to change the background-color and font-size attributes to fit your preferences
            client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
            client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
            client.println(".button2 {background-color: #555555;}</style></head>");
            
            // Web Page Heading
            client.println("<body><h1>ESP32 Web Server</h1>");
            
            // Display current state, and ON/OFF buttons for build in led  
            client.println("<p>Builtin led - State " + outputLedState + "</p>");
            // If the builtin led is off, it displays the ON button       
            if (outputLedState=="off") {
              client.println("<p><a href=\"/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 
            client.println("</body></html>");
            
            // The HTTP response ends with another blank line
            client.println();
            // Break out of the while loop
            break;
          } else { // if you got a newline, then clear currentLine
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }
      }
    }
    // Clear the header variable
    header = "";
    // Close the connection
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }
}

/*
  Gebaseerd op https://RandomNerdTutorials.com/esp32-http-get-open-weather-map-thingspeak-arduino/
*/

#include <WiFi.h>
#include <HTTPClient.h>
#include <Arduino_JSON.h>

const char* ssid = "YOUR_SSID";
const char* password = "YOUR_SSID_PASSWORD";

// THE DEFAULT TIMER IS SET TO 10 SECONDS FOR TESTING PURPOSES
// For a final application, check the API call limits per hour/minute to avoid getting blocked/banned
unsigned long lastTime = 0;
// Timer set to 10 minutes (600000)
//unsigned long timerDelay = 600000;
// Set timer to 10 seconds (10000)
unsigned long timerDelay = 10000;

String jsonBuffer;

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());
  Serial.println("Timer set to 10 seconds (timerDelay variable), it will take 10 seconds before publishing the first reading.");
}

void loop() {
  // Send an HTTP GET request
  if ((millis() - lastTime) > timerDelay) {
    // Check WiFi connection status
    if (WiFi.status() == WL_CONNECTED) {
      String serverPath = "http://jsonplaceholder.typicode.com/users/1";
      jsonBuffer = httpGETRequest(serverPath.c_str());
      Serial.println(jsonBuffer);
      JSONVar myObject = JSON.parse(jsonBuffer);
      // JSON.typeof(jsonVar) can be used to get the type of the var
      if (JSON.typeof(myObject) == "undefined") {
        Serial.println("Parsing input failed!");
        return;
      }
      Serial.print("JSON object = ");
      Serial.println(myObject);
      Serial.print("id: ");
      Serial.println(myObject["id"]);
      Serial.print("name: ");
      Serial.println(myObject["name"]);
      Serial.print("username: ");
      Serial.println(myObject["username"]);
      Serial.print("Company Name: ");
      Serial.println(myObject["company"]["name"]);
    }
    else {
      Serial.println("WiFi Disconnected");
    }
    lastTime = millis();
  }
}

String httpGETRequest(const char* serverName) {
  WiFiClient client;
  HTTPClient http;

  // Your Domain name with URL path or IP address with path
  http.begin(client, serverName);

  // Send HTTP GET request
  int httpResponseCode = http.GET();

  String payload = "{}";

  if (httpResponseCode > 0) {
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    payload = http.getString();
  }
  else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
  }
  // Free resources
  http.end();

  return payload;
}

Serial.print("id: ");
Serial.println(myObject["id"]);

int i = 0;
int j = 0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  Serial.print(i); 
  Serial.print(",");
  Serial.print(j);
  Serial.println();
  i=i+1;
  j=j+2;
  delay(1000);
}