esp8266pwm波代码
时间: 2023-08-14 19:13:36 浏览: 95
代码esp8266
当然可以!以下是一个使用ESP8266的PWM波控制LED灯亮度的示例代码:
```c
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
ESP8266WebServer server(80);
int ledPin = D1; // 定义LED连接的引脚
int brightness = 0; // LED亮度
void handleRoot() {
String html = "<html><body>";
html += "<h1>ESP8266 PWM Control</h1>";
html += "<p>Brightness: " + String(brightness) + "</p>";
html += "<input type='range' min='0' max='255' value='" + String(brightness) + "' onchange='updateBrightness(this.value)'>";
html += "<script>function updateBrightness(value) {";
html += "var xhttp = new XMLHttpRequest();";
html += "xhttp.open('GET', '/setBrightness?value=' + value, true);";
html += "xhttp.send();}</script>";
html += "</body></html>";
server.send(200, "text/html", html);
}
void handleSetBrightness() {
if (server.args() > 0) {
brightness = server.arg(0).toInt();
analogWrite(ledPin, brightness);
}
server.send(200, "text/plain", String(brightness));
}
void setup() {
pinMode(ledPin, OUTPUT);
analogWriteRange(255); // 设置PWM范围为0-255
analogWriteFreq(1000); // 设置PWM频率为1000Hz
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
server.on("/", handleRoot);
server.on("/setBrightness", handleSetBrightness);
server.begin();
Serial.println("HTTP server started");
}
void loop() {
server.handleClient();
}
```
请替换代码中的 `your_SSID` 和 `your_PASSWORD` 分别为你的Wi-Fi网络的名称和密码。该代码通过建立一个简单的web服务器,允许你通过调整HTML页面上的滑块来控制LED的亮度。LED连接在ESP8266的引脚D1上,你可以根据需要进行更改。
希望这可以帮助到你!如果有任何其他问题,请随时问我。
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