WED | Electronics + Programming

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 6 as an output.
  pinMode(6, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(6, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(6, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

#define IFTTT_Key ""

/* This program creates a panic button using an Arduino MKR1000 and IFTTT service. When button is pushed LED flashes and a notification, SMS, VOIP call or phonecall is initiated. It uses code from Robert 7320 for the LED and button www.instructables.com/id/5-Simple-Button-and-Led-Projects-with-Arduino/
  Additional code from Rui Santos for his version of an ESP8266 panic button www.randomnerdtutorials.com/esp8266-wi-fi-button-diy-amazon-dash-button-clone/
*/
#include <WiFi101.h>
#include <WiFiUdp.h>
#include <SPI.h>

// Set IFTTT Webhooks event name and key
#define IFTTT_Key "" // add your IFTT key here
#define IFTTT_Event "button_pressed"    // write the name of the event you creaeted
String IFTTT_Value1 = "Matti";
String IFTTT_Value2 = "milliseconds: ";
String IFTTT_Value3 = "counter: ";
int counter = 0;

const char* ssid = "aalto open";   // Your network SSID (name)
const char* password = "";  // Your network password (use for WPA, or use as key for WEP)

// Unique IFTTT URL resource

int LED = 6;  //declaring pin for LED
int BUTTON = 5;  //declaring pin for button
// Maker Webhooks IFTTT
const char* server = "maker.ifttt.com";

WiFiClient client;

void setup() {
  Serial.begin(115200);  //set rate of serial monitor
  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present, stopping.");
    // don't continue:
    while (true);
  }
  initWifi();
  //makeIFTTTRequest();

  pinMode(LED, OUTPUT); //set LED pin as output
  pinMode(BUTTON, INPUT_PULLUP); //set button pin as input
  pinMode(4, OUTPUT); //set button pin as input
  digitalWrite(4, LOW);
}
// this loop looks for a button push and if happens
//blinks LED and runs IFTTT request loop (otherwise LED off)
void loop() {
  if (digitalRead(BUTTON) == LOW) {
    digitalWrite(LED, HIGH);
    delay (200);
    initWifi();
    counter++;
    //IFTTT_Value1 = "Matti";
    IFTTT_Value2 = "milliseconds: " + String(millis());
    IFTTT_Value3 = "counter: " + String(counter);
    send_webhook();
    digitalWrite(LED, LOW);
  } else {
    digitalWrite(LED, LOW);
  }
}
// this loop helps for debugging Wifi connection
//and initiates Wifi

void initWifi() {
  Serial.print("Connecting to: ");
  Serial.print(ssid);
  //WiFi.begin(ssid);
  //delay(1000);
  int timeout = 10 * 4; // 10 seconds
  while (WiFi.status() != WL_CONNECTED ) {
    WiFi.begin(ssid);
    Serial.print(".");
    delay(5000);
  }
  Serial.println("");

  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("Failed to connect, going back to sleep");
  }

  Serial.print("WiFi connected in: ");
  Serial.print(millis());
  Serial.print(", IP address: ");
  Serial.println(WiFi.localIP());
}

void send_webhook() {
  Serial.print("Connecting to ");
  Serial.print(server);
  // construct the JSON payload
  String jsonString = "";
  jsonString += "{\"value1\":\"";
  jsonString += IFTTT_Value1;
  jsonString += "\",\"value2\":\"";
  jsonString += IFTTT_Value2;
  jsonString += "\",\"value3\":\"";
  jsonString += IFTTT_Value3;
  jsonString += "\"}";
  int jsonLength = jsonString.length();
  String lenString = String(jsonLength);
  // connect to the Maker event server
  client.connect(server, 80);
  // construct the POST request
  String postString = "";
  postString += "POST /trigger/";
  postString += IFTTT_Event;
  postString += "/with/key/";
  postString += IFTTT_Key;
  postString += " HTTP/1.1\r\n";
  postString += "Host: maker.ifttt.com\r\n";
  postString += "Content-Type: application/json\r\n";
  postString += "Content-Length: ";
  postString += lenString + "\r\n";
  postString += "\r\n";
  postString += jsonString; // combine post request and JSON

  client.print(postString);
  delay(500);
  int timeout = 5 * 10; // 5 seconds
  while (!!!client.available() && (timeout-- > 0)) {
    delay(100);
  }
  if (!!!client.available()) {
    Serial.println("No response, going back to sleep");
  }
  while (client.available()) {
    Serial.write(client.read());
  }
  Serial.println("\nclosing connection");
  client.stop();
}