Arduino tutorial: ESP32 Weather_Station WebServer
VCC 3.3V
GND GND
DATA 23
VCC 3.3V
GND GND
DATA 23
Schema
ARDUINO 1.8.9
ESP32 Weather_Station WebServer
Library
https://github.com/adafruit/DHT-sensor-library
Programming ESP32 with Arduino IDE:
https://www.youtube.com/watch?v=9b0Txt-yF7E
Programming ESP32 with Arduino IDE:
https://www.youtube.com/watch?v=9b0Txt-yF7E
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Code
// REQUIRES the following Arduino libraries:
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// Find All "Great Projects" Videos : https://www.youtube.com/channel/UCCC8DuqicBtP3A_aC53HYDQ/videos
#include "DHT.h"
#define DHTPIN 23
#define DHTTYPE DHT11 // DHT 11
DHT dht(DHTPIN, DHTTYPE);
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include "index.h" //Web page header file
WebServer server(80);
//Enter your SSID and PASSWORD
const char* ssid = "********";
const char* password = "*********";
void handleRoot() {
String s = MAIN_page; //Read HTML contents
server.send(200, "text/html", s); //Send web page
}
void handleADC() {
// send XML file containing input states
XML_response();
}
void setup()
{
Serial.begin(115200);
Serial.println();
Serial.println("Booting Sketch...");
/*
//ESP32 As access point
WiFi.mode(WIFI_AP); //Access Point mode
WiFi.softAP(ssid, password);
*/
//ESP32 connects to your wifi
WiFi.mode(WIFI_STA); //Connectto your wifi
WiFi.begin(ssid, password);
Serial.println("Connecting to ");
Serial.print(ssid);
//Wait for WiFi to connect
while(WiFi.waitForConnectResult() != WL_CONNECTED){
Serial.print(".");
}
//If connection successful show IP address in serial monitor
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP()); //IP address assigned to your ESP
server.on("/", handleRoot); //This is display page
server.on("/readADC", handleADC);//To get update of ADC Value only
server.begin(); //Start server
dht.begin();
Serial.println("HTTP server started");
}
void loop()
{
server.handleClient();
delay(1);
}
// send the XML file containing analog value
void XML_response()
{
float h = dht.readHumidity()*1.57;
float t = dht.readTemperature();
String content = "<?xml version = \"1.0\" ?>";
content += "<inputs>";
content += "<analog>";
content += t;
content += "</analog>";
content += "<analog>";
content += h;
content += "</analog>";
content += "</inputs>";
server.sendHeader("Cache-Control", "no-cache");
server.send(200, "text/xml", content); //Send web page
}
Font_Data.h
const char MAIN_page[] PROGMEM = R"=====(
<!DOCTYPE html>
<html>
<head>
<title>ESP32 Weather Station</title>
<script>
var data_val = 0;
var data_val2 = 0;
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function DisplayCurrentTime() {
var dt = new Date();
var weekday = new Array(7);
weekday[0] = "Sunday";
weekday[1] = "Monday";
weekday[2] = "Tuesday";
weekday[3] = "Wednesday";
weekday[4] = "Thursday";
weekday[5] = "Friday";
weekday[6] = "Saturday";
var dow = weekday[dt.getDay()];
document.getElementById("datetime").innerHTML = (dow) +" "+ (dt.toLocaleString());
setTimeout('DisplayCurrentTime()', 1000);
}
function GetArduinoInputs()
{
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
data_val = this.responseXML.getElementsByTagName('analog')[0].childNodes[0].nodeValue;
data_val2 = this.responseXML.getElementsByTagName('analog')[1].childNodes[0].nodeValue;
}
};
xhttp.open("GET", "readADC", true);
xhttp.send();
setTimeout('GetArduinoInputs()', 3000);
}
document.addEventListener('DOMContentLoaded', function() {
DisplayCurrentTime(),GetArduinoInputs();
}, false);
</script>
<style>
body {
text-align: center;
margin: 5;
padding: 5;
background-color: rgba(72,72,72,0.4);
}
.text {
background-color: #ff0000;
font-size:76px;
color: #ffff99;
}
table {
border: 2px solid #ff00ff;
background-color: #ffffff;
width:100%;
color: #0000ff;
-moz-border-radius: 7px;
-webkit-border-radius: 7px;
}
td {
border: 2px solid #ff0000;
padding: 16px;
-moz-border-radius: 7px;
-webkit-border-radius: 7px;
}
</style>
</head>
<body>
<b style= "color: #ff0000;font-size:35px">ESP32 Weather Station</b>
<table>
<tr>
<td style="width:48%"><canvas id="an_gauge_1" data-title="Temperature" data-units="°C" width="400" height="500" data-major-ticks="-20 -10 0 10 20 30 40 50 60 70" data-type="canv-gauge" data-min-value="-20" data-max-value="70" data-highlights="-20 0 #4D89F2, 0 10 #25B8D9, 10 30 #0BB950, 30 40 #cc5, 40 70 #f33" data-onready="setInterval( function() { Gauge.Collection.get('an_gauge_1').setValue(data_val);}, 200);"></canvas></td>
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</tr>
</table>
<b style= "color: #ff0000;font-size:35px"><span id="datetime"></span></b>
</body>
</html>
)=====";
