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#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
// Including the DHT library
#include "DHT.h"
const char *ssid = "TP8";
const char *password = "tzspot123";
ESP8266WebServer server(80);
float h;
float t;
#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
// DHT Sensor
const int DHTPin = D4;
// Initialize DHT sensor.
DHT dht(DHTPin, DHTTYPE);
boolean ledState = false;
void handleRoot() {
Serial.println("Handle root");
h = dht.readHumidity();
Serial.println("humidity read");
Serial.println(h);
// Read temperature as Celsius (the default)
t = dht.readTemperature();
Serial.println("temperature read");
Serial.println(t);
if (isnan(h) || isnan(t)) {
server.send(500, "text/html", "<h1>Failed to read from DHT sensor!</h1>");
} else {
int sec = millis() / 1000;
int min = sec / 60;
int hr = min / 60;
char uptime[9];
snprintf(uptime, 9, "%02d:%02d:%02d", hr, min % 60, sec % 60);
String temp ="<html>\
<head>\
<meta http-equiv='refresh' content='5'/>\
<meta name='viewport' content='width=device-width, initial-scale=1.0'>\
<title>ESP8266 Demo</title>\
<style>\
body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; color: #000088; }\
table, th, td { border: 1px solid black; }\
th { font-weight: bold; }\
table { width: 300px; }\
</style>\
</head>\
<body>\
<h1>Node MCU Sensor Data</h1>\
<p>Uptime: " + String(uptime) + "</p>\
<table>\
<tr><th>field</th><th>value</th></tr>\
<tr><td>Chip ID</td><td>" + String(ESP.getChipId()) + "</td></tr>\
<tr><td>VCC</td><td>" + String(ESP.getVcc()) + "V</td></tr>\
<tr><td>Humidity</td><td>" + String(h) + "%</td></tr>\
<tr><td>Temperature</td><td>" + String(t) + "°C</td></tr>\
<tr><td>Built in LED state</td><td><a href='" + ((!ledState) ? "on" : "off") + "'>" + ((ledState) ? "on" : "off") + "</a></td></tr>\
</table>\
</body>\
</html>";
server.send(200, "text/html", temp);
}
}
void handleOn() {
digitalWrite(BUILTIN_LED, LOW);
ledState = true;
server.sendHeader("Location", "/", true);
server.send ( 302, "text/plain", "");
}
void handleOff() {
digitalWrite(BUILTIN_LED, HIGH);
ledState = false;
server.sendHeader("Location", "/", true);
server.send ( 302, "text/plain", "");
}
/**********************************************/
/* WiFi connecting script
/**********************************************/
void connectWifi() {
WiFi.begin(ssid, password); // Start WiFI
Serial.print("Connecting ");
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print(".");
}
Serial.println("WiFi connected");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
dht.begin();
}
void initServer() {
server.on("/", handleRoot);
server.on("/on", handleOn);
server.on("/off", handleOff);
server.begin();
Serial.println("HTTP server initialized");
}
void setup() {
Serial.begin(9600); //Output to Serial at 9600 baud
connectWifi(); // Start ConnecWifi
Serial.print("\n");
Serial.println("ChipId: ");
Serial.println(ESP.getChipId());
initServer();
pinMode(BUILTIN_LED, OUTPUT);
digitalWrite(BUILTIN_LED, HIGH);
}
void loop() {
server.handleClient();
}
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