li2hub

void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
delay(1000);                       // wait for a second
digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
delay(1000);                       // wait for a second

li2hub

const int trigPin = 2;  //D4
const int echoPin = 0;  //D3

long duration;\\defining variable duration to hold the duration of the reflected wave
int distance;\\defining variable distance to hold the distance of the object from the sensor

void setup() {
pinMode(2, OUTPUT); // Sets the trigPin as an Output
pinMode(0, INPUT); // Sets the echoPin as an Input
Serial.begin(9600); // Starts the serial communication with baud rate 9600

li2hub

int shockPin = 10; // Use Pin 10 as our Input
int shockVal = HIGH; // This is where we record our shock measurement
boolean bAlarm = false;

unsigned long lastShockTime; // Record the time that we measured a shock

int shockAlarmTime = 250; // Number of milli seconds to keep the shock alarm high


void setup ()

li2hub

#include "DHT.h"
#define dht_apin A0 // Analog Pin sensor is connected to
 
dht DHT;
 
void setup(){
 
  Serial.begin(9600);
  delay(500);//Delay to let system boot
  Serial.println("DHT11 Humidity & temperature Sensor\n\n");

li2hub

int led = 13;//LED pin
int sensor = 3; //sensor pin
int val; //numeric variable

void setup()
{
	pinMode(led, OUTPUT); //set LED pin as output
	pinMode(sensor, INPUT); //set sensor pin as input
}

li2hub

int Buzzer = 13; // Use buzzer for alert 
int FlamePin = 2;  // This is for input pin
int Flame = HIGH;  // HIGH when FLAME Exposed

void setup() {
  pinMode(Buzzer, OUTPUT);
  pinMode(FlamePin, INPUT);
  Serial.begin(9600);
  
}

li2hub

int sensorPin = A0; // Pulse Sensor connected to ANALOG PIN 0
int led = 13; // The on-board Arduino LED
int Signal; // holds the incoming raw data. Signal value can range from 0-1023
int Threshold = 550; // Determine which Signal to “count as a beat”, and which to ingore.
// The SetUp Function:
void setup() {
pinMode(sensorPin,INPUT);
pinMode(led,OUTPUT); // pin that will blink to your heartbeat!
Serial.begin(9600); // Set’s up Serial Communication at certain speed.
}

li2hub

#include <ArduinoJson.h>

void setup() {
  // Initialize Serial port
  Serial.begin(9600);
  while (!Serial) continue;

  // Memory pool for JSON object tree.
  //
  // Inside the brackets, 200 is the size of the pool in bytes.

li2hub

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
  
void setup () {
  Serial.begin(115200); //Begin Serial Communication with NodeMCU
  
  const char* ssid = "Your router name";
  const char* password = "Your router password";
  WiFi.begin(ssid, password); //Connect to WiFi

li2hub

#include <ESP8266WiFi.h>
#include <PubSubClient.h>
 
const char* ssid = "YourNetworkName";
const char* password =  "YourNetworkPassword";
const char* mqttServer = "m11.cloudmqtt.com";
const int mqttPort = 12948; //your port number
const char* mqttUser = "YourMqttUser";
const char* mqttPassword = "YourMqttUserPassword";