2017年10月15日 星期日
NodeMCU Web Server Showing DHT11 Data
#include <ESP8266WiFi.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
// Replace with your network details
//const char* ssid = "YOUR_NETWORK_NAME";
//const char* password = "YOUR_NETWORK_PASSWORD";
const char* ssid = "74170287";
const char* password = "24063173";
#define DHTPIN 5 // what pin we're connected to
#define DHTTYPE DHT11 // DHT 11
DHT dht(DHTPIN, DHTTYPE);
WiFiServer server(80);
void setup()
{
Serial.begin(115200);
// Connect to WiFi network
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
dht.begin();
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.print("Use this URL : ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
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
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
// Return the response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connnection: close");
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<meta http-equiv=\"refresh\" content=\"5\">");
client.println("<br />");
client.println(""); // do not forget this one
float h = dht.readHumidity();
float t = dht.readTemperature();
float f = dht.readTemperature(true);
if (isnan(h) || isnan(t) || isnan(f))
{
Serial.println("Failed to read from DHT sensor!");
return;
}
client.print("Temperature (C): ");
client.println(t, 1);
client.println("<br />");
client.print("Humidity (%): ");
client.println(h, 0);
client.println("<br />");
client.println("</html>");
delay(1);
Serial.println("Client disconnected");
}
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