我正在使用Nodenmcu与arduino IDE。我用DHT11 IC来读取温度和湿度。现在我想在名为set_temp的网页中添加参数。当Set_temp值设置为value时，应该在按下更改图标时更新该值。这是我的代码。我的代码正在工作，直到从web输入文本，但它不会更新set_temp值
#include <ESP8266WiFi.h>
#include "DHT.h"
static float Set_Temp;
DHT dht;
int value = LOW;
const char* ssid = "esp8266";
const char* password = "Test123456";
int ledPin = 13; // GPIO13
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(10);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
dht.setup(D3); /* D1 is used for data communication */
// 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.print("Use this URL to connect: ");
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);
}
// New code has been added
delay(dht.getMinimumSamplingPeriod()); /* Delay of amount equal to sampling period */
float humidity = dht.getHumidity(); /* Get humidity value */
float temperature = dht.getTemperature(); /* Get temperature value */
// Serial.print(dht.getStatusString()); /* Print status of communication */
if(temperature>=Set_Temp)
{
digitalWrite(ledPin, HIGH);
value = HIGH;
}else
{
digitalWrite(ledPin, LOW);
value = LOW;
}
// Read the first line of the request
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
// Match the request
/* if (request.indexOf("/LED=ON") != -1) {
digitalWrite(ledPin, HIGH);
value = HIGH;
}
if (request.indexOf("/LED=OFF") != -1) {
digitalWrite(ledPin, LOW);
value = LOW;
}*/
// Set ledPin according to the request
//digitalWrite(ledPin, value);
// Return the response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.print("Relay_Turn_On_Status: ");
if(value == HIGH) {
client.print("On");
} else {
client.print("Off");
}
// client.println("<br><br>");
// client.println("<a href=\"/LED=ON\"\"><button>Turn On </button></a>");
// client.println("<a href=\"/LED=OFF\"\"><button>Turn Off </button></a><br />");
// client.println("</html>");
client.print("</html>");
client.print("<head>");
client.print("<title>My Page</title>");
client.print("</head>");
client.print("<body>");
client.print("<br><br>");
client.print("Set_Temp: ");
client.println("<input type=text name=textbox size=5 value=Enter_Temp_Here");
client.println("<br><input type=submit value=Change ><br>");
client.println("</div>");
client.println("</body>");
client.println("</html>");
Set_Temp:"<br><input type=submit value=Change ><br>";
//Set_Temp:"<input type=text name=textbox size=5 value=Enter_Temp_Here>";
Serial.println(Set_Temp);
client.println("<br><br>");
client.println("DHT11_HumidityReading: ");
client.println(humidity,1);
client.println("<br><br>");
client.println("DHT11_Temprature Reading: ");
client.println(temperature,1);
client.println("<br><br>");
client.println("Set_Temp: ");
client.println(Set_Temp);
client.println("<br><br>");
delay(1);
Serial.println("Client disonnected");
Serial.println("");
}
我在这段代码中的主要疑问是，一旦我读到它就不会更新。
Set_Temp:"<br><input type=submit value=Change ><br>";
//Set_Temp:"<input type=text name=textbox size=5 value=Enter_Temp_Here>";
Serial.println(Set_Temp);
如果我这样使用。它会显示-1
Set_Temp=readString.indexOf(2);
我遵循HTTP https://www.w3schools.com/htmL/[Serial Out Here][web page]的get＆post方法
如何从文本框更改我的Set_Temp值。
看看这篇文章，我按照它开启并使用Arduino IDE关闭NodeMCU中的灯光。 Web中的客户端是用PHP编写的。
https://blog.nyl.io/esp8266-led-arduino/
<?php
$light = $_GET['light'];
if($light == "on") {
$file = fopen("light.json", "w") or die("can't open file");
fwrite($file, '{"light": "on"}');
fclose($file);
}
else if ($light == "off") {
$file = fopen("light.json", "w") or die("can't open file");
fwrite($file, '{"light": "off"}');
fclose($file);
}
?>
我希望这对你有帮助。
问候