Read temperature and humidity from nodemcu ESP12E (WeMos D1 R2 )with DHT11 and show it on HTML webpage(Local)-part1
//======================================
//server ex:
http://192.168.1.104/data
//======================================
#include <ESP8266WiFi.h>
#include "DHT.h"
#define DHTPIN D1
#define DHTTYPE DHT11
const char* ssid = "PTS-2F"; //"your SSID or hotspot or wifi name";
const char* password = ""; //"password of hotspot or wifi or ssid";
// Create an instance of the server
// specify the port to listen on as an argument
WiFiServer server(80);
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(115200);
delay(10);
dht.begin();
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.println(WiFi.localIP());
// Read the first line of the request
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
Serial.print("Humidity : ");
Serial.print(h,2);
Serial.print("% Temperature: ");
Serial.print(t,2);
Serial.println("C");
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}
// Read the first line of the request
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
String req = client.readStringUntil('\r');
Serial.println(req);
client.flush();
if (req.indexOf("/data") != -1){
client.flush();
client.println("HTTP/1.1 200 OK"); // This tells the browser that the request to provide data was accepted
client.println("Access-Control-Allow-Origin: *"); //Tells the browser it has accepted its request for data from a different domain (origin).
client.println("Content-Type: application/json;charset=utf-8"); //Lets the browser know that the data will be in a JSON format
client.println("Server: Arduino"); // The data is coming from an Arduino Web Server (this line can be omitted)
client.println("Connection: close"); // Will close the connection at the end of data transmission.
client.println(); // You need to include this blank line - it tells the browser that it has reached the end of the Server reponse header.
// This is tha starting bracket of the JSON data
client.print("{\"temperature\": \"");
client.print(t);
client.print("\", \"Humidity\": \"");
client.print(h);
client.print("\"}");
}
else {
client.flush();
client.println("HTTP/1.1 200 OK"); // This tells the browser that the request to provide data was accepted
client.println("Access-Control-Allow-Origin: *"); //Tells the browser it has accepted its request for data from a different domain (origin).
client.println("Content-Type: application/json;charset=utf-8"); //Lets the browser know that the data will be in a JSON format
client.println("Server: Arduino"); // The data is coming from an Arduino Web Server (this line can be omitted)
client.println("Connection: close"); // Will close the connection at the end of data transmission.
client.println(); // You need to include this blank line - it tells the browser that it has reached the end of the Server reponse header.
// This is tha starting bracket of the JSON data
client.print("{\"Response\": ");
client.print("Invalid");
client.print("}");
// This is the final bracket of the JSON data
}
delay(1);
Serial.println("Client disonnected");
}
