/* ESP32 HTTP IoT Server Example for Wokwi.com
https://wokwi.com/arduino/projects/320964045035274834
To test, you need the Wokwi IoT Gateway, as explained here:
https://docs.wokwi.com/guides/esp32-wifi#the-private-gateway
Then start the simulation, and open http://localhost:9080
in another browser tab.
Note that the IoT Gateway requires a Wokwi Club subscription.
To purchase a Wokwi Club subscription, go to https://wokwi.com/club
*/
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include <uri/UriBraces.h>
#include "DHTesp.h"
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
// Defining the WiFi channel speeds up the connection:
#define WIFI_CHANNEL 6
WebServer server(80);
const int DHT_PIN = 15;
DHTesp dhtSensor;
TempAndHumidity data;
void sendHtml() {
String response = R"(
<!DOCTYPE html><html>
<head>
<title>ESP32 Web Server Demo</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
html { font-family: sans-serif; text-align: center; }
body { display: inline-flex; flex-direction: column; }
h1 { margin-bottom: 1.2em; }
h2 { margin: 0; }
div { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: auto auto; grid-auto-flow: column; grid-gap: 1em; }
.btn { background-color: #5B5; border: none; color: #fff; padding: 0.5em 1em;
font-size: 2em; text-decoration: none }
.btn.OFF { background-color: #333; }
</style>
</head>
<body>
<h1>ESP32 Web Server</h1>
<div>
<h2>TEMP</h2>
<a href="/toggle/1" class="btn TEMP">TEMP</a>
<h2>HUMID</h2>
<a href="/toggle/2" class="btn HUMID">HUMID</a>
</div>
</body>
</html>
)";
response.replace("TEMP", "Temp: " + String(data.temperature, 2) + "°C");
response.replace("HUMID", "Humidity: " + String(data.humidity, 1) + "%");
server.send(200, "text/html", response);
}
void setup(void) {
Serial.begin(115200);
dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD, WIFI_CHANNEL);
Serial.print("Connecting to WiFi ");
Serial.print(WIFI_SSID);
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(100);
Serial.print(".");
}
Serial.println(" Connected!");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
server.on("/", sendHtml);
// server.on(UriBraces("/toggle/{}"), []() {
// String led = server.pathArg(0);
// Serial.print("Toggle LED #");
// Serial.println(led);
// switch (led.toInt()) {
// case 1:
// led1State = !led1State;
// digitalWrite(LED1, led1State);
// break;
// case 2:
// led2State = !led2State;
// digitalWrite(LED2, led2State);
// break;
// }
// sendHtml();
// });
server.begin();
Serial.println("HTTP server started");
}
void loop(void) {
data = dhtSensor.getTempAndHumidity();
Serial.println("Temp: " + String(data.temperature, 2) + "°C");
Serial.println("Humidity: " + String(data.humidity, 1) + "%");
Serial.println("---");
server.handleClient();
delay(1000);
}