带DHT11传感器的ESP8266温湿度Web服务器

步骤1：零件清单

• ESP8266 ESP-01
• DHT11温湿度传感器
• 4.7k电阻

步骤2：ESP8266 + DHT11  传感器接线

步骤3：将代码上传到ESP8266

[Code-generic:1]
#include"ESP8266WiFi.h"
#include"DHT11.h"

const char* ssid     = "ssid"; // Your ssid
const char* password = "password"; // Your Password

int pin = 2;

WiFiServer server(80);
DHT11 dht11(pin);

double Fahrenheit(double celsius) {
return ((double)(9 / 5) * celsius) + 32;
}

double Kelvin(double celsius) {
return celsius + 273.15;
}

void setup() {
Serial.begin(115200);
delay(10);
Serial.println();

// Connect to WiFi network
WiFi.mode(WIFI_STA);
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());
}

void loop() {
int err;
float temp, humi;
if ((err = dht11.read(humi, temp)) == 0)
{
Serial.print("temperature:");
Serial.print(temp);
Serial.print(" humidity:");
Serial.print(humi);
Serial.println();
}
else
{
Serial.println();
Serial.print("Error No :");
Serial.print(err);
Serial.println();
}
WiFiClient client = server.available();
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close");  // the connection will be closed after completion of the response
client.println("Refresh: 5");  // refresh the page automatically every 5 sec
client.println();
client.println("");
client.println("");
client.println("n");
client.println("ESP8266 Temperature & Humidity DHT11 Sensor");
client.println("n");
client.println("

ESP8266 & DHT11 Sensor

");
client.println("Humidity / Temperature");
client.println("

");
client.print("Humidity (%)         : ");
client.println((float)humi, 2);
client.print("Temperature (°C)  : ");
client.println((float)temp, 2);
client.print("Temperature (°F)  : ");
client.println(Fahrenheit(temp), 2);
client.print("Temperature (°K)  : ");
client.println(Kelvin(temp), 2);
client.println("

“);
client.println(“www.elec-cafe.com”);
client.print(“n

步骤4：串行监视器

步骤5：Web监视器

通过ip地址打开Internet浏览器以显示温度和湿度信息
（至“自动刷新5秒”的页面）