COVID19 and other Projects with program: ESP32 Dual Core Programming with Arduino, Keen Wi-Fi Video Doorbell, MicroPython on ESP32, ESP32 Based Webserver, Face Recognition, Fitness Band etc.., by K Anbazhagan
Author:K, Anbazhagan [K, Anbazhagan]
Language: eng
Format: epub
Published: 2020-05-27T16:00:00+00:00
Code
#include <WiFi.h>
#include <Wire.h>
#include "DHT.h"
// Uncomment one of the lines below for whatever DHT sensor type you're using!
#define DHTTYPE DHT11 // DHT 11
//DHT Sensor;
uint8_t DHTPin = D2;
DHT dht(DHTPin, DHTTYPE);
float Temperature;
float Humidity;
void send_event(const char *event);
const char* ssid = "Wi-Fi Name";
const char* password = "Password";
const char *host = "maker.ifttt.com";
const char *privateKey = "Private Key"; Enter the privte key that you copied from IFTTT Webhooks
WiFiServer server(80);
String header;
void setup() {
Serial.begin(115200);
pinMode(DHTPin, INPUT);
dht.begin();
Serial.print("Connecting to Wifi Network");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("Successfully connected to WiFi.");
Serial.println("IP address of ESP32 is : ");
Serial.println(WiFi.localIP());
server.begin();
Serial.println("Server started");
}
void loop()
{
Temperature = dht.readTemperature();
Humidity = dht.readHumidity();
WiFiClient client = server.available();
if (client)
{
Serial.println("Web Client connected ");
String request = client.readStringUntil('\r');
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 10"); // update the page after 10 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<style>html { font-family: Cairo; display: block; margin: 0px auto; text-align: center;color: #333333; background-color: ##f3ffee;}");
client.println("body{margin-top: 50px;}");
client.println("h1 {margin: 50px auto 30px; font-size: 50px; text-align: center;}");
client.println(".side_adjust{display: inline-block;vertical-align: middle;position: relative;}");
client.println(".text1{font-weight: 180; padding-left: 15px; font-size: 50px; width: 170px; text-align: left; color: #3498db;}");
client.println(".data1{font-weight: 180; padding-left: 70px; font-size: 50px;color: #3498db;}");
client.println(".text2{font-weight: 180;padding-left: 15px; font-size: 50px; width: 170px; text-align: left; color: #ff6600;}");
client.println(".data2{font-weight: 180; padding-left: 120px; font-size: 50px;color: #ff6600;}");
client.println(".data{padding: 10px;}");
client.println("</style>");
client.println("</head>");
client.println("<body>");
client.println("<div id=\"webpage\">");
client.println("<h1>ESP32 Interfacing with DHT11</h1>");
client.println("<div class=\"data\">");
client.println("<div class=\"side_adjust text1\">Humidity:</div>");
client.println("<div class=\"side_adjust data1\">");
client.print(Humidity);
client.println("<div class=\"side_adjust text1\">%</div>");
client.println("</div>");
client.println("<div class=\"data\">");
client.println("<div class=\"side_adjust text2\">Temperature:</div>");
client.println("<div class=\"side_adjust data2\">");
client.print(Temperature);
client.println("<div class=\"side_adjust text2\">*C</div>");
client.println("</div>");
client.println("</div>");
client.println("</body>");
client.println("</html>");
delay(4000);
if ( Temperature >= 20) {
send_event("temp_event");
}
}
}
void send_event(const char *event)
{
Serial.print("Connecting to ");
Serial.println(host);
// Use WiFiClient class to create TCP connections
WiFiClient client;
const int httpPort = 80;
if (!client.connect(host, httpPort)) {
Serial.println("Connection failed");
return;
}
// We now create a URI for the request
String url = "/trigger/";
url += event;
url += "/with/key/";
url += privateKey;
Serial.print("Requesting URL: ");
Serial.println(url);
// This will send the request to the server
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: close\r\n\r\n");
while(client.connected())
{
if(client.available())
{
String line = client.readStringUntil('\r');
Serial.print(line);
} else {
// No data yet, wait a bit
delay(50);
};
}
Serial.println();
Serial.println("closing connection");
client.stop();
}
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