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esp8266通过drv8833控制电机驱动马达

``` C
#include <ESP8266WebServer.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>

// WiFi配置
const char *ssid = "xxx";
const char *password = "xxx";

ESP8266WiFiMulti wifiMulti;
// Web服务器实例
ESP8266WebServer server(80);

// GPIO定义
#define AIN1 5  // D1
#define AIN2 4  // D2
#define BIN1 14 // D5
#define BIN2 12 // D6
#define LED_PIN D4
void controlMotors(int command);
String sendHTML(int moveState);

enum MOVE {
  FORWARD,  // 默认从0开始
  BACKWARD, // 1
  LEFT,     // 2
  RIGHT,    // 3
  STOP
};
void blink(int pin, int t, int n) {
  for (int i = 0; i < n; i++) {
    digitalWrite(pin, LOW);
    delay(t);
    digitalWrite(pin, HIGH);
    delay(t);
  }
}
void setup() {
  Serial.begin(115200);

  pinMode(LED_PIN, OUTPUT);
  // 初始化GPIO模式
  pinMode(AIN1, OUTPUT);
  pinMode(AIN2, OUTPUT);
  pinMode(BIN1, OUTPUT);
  pinMode(BIN2, OUTPUT);

  wifiMulti.addAP("xxx", "xxx");
  wifiMulti.addAP("xxx", "xxx");
  Serial.println("Connecting ...");

  int i = 0;
  while (wifiMulti.run() != WL_CONNECTED) {
    delay(1000);
    Serial.print(i++);
    Serial.print(' ');
  }

  // 连接到WiFi网络
  // WiFi.begin(ssid, password);
  // while (WiFi.status() != WL_CONNECTED) {
  //   delay(1000);
  //   Serial.println("Connecting to WiFi...");
  // }
  Serial.print("Connected to WiFi : ");
  Serial.println(WiFi.SSID());
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
  blink(LED_PIN, 500, 3);
  // 设置路由处理程序
  server.on("/", HTTP_GET, []() {
    // String html = "<html><body>";
    // html += "<h1>Motor Control</h1>";
    // html += "<a href=\"/forward\">Forward</a><br>";
    // html += "<a href=\"/backward\">Backward</a><br>";
    // html += "<a href=\"/left\">Left</a><br>";
    // html += "<a href=\"/right\">Right</a><br>";
    // html += "<a href=\"/stop\">Stop</a><br>";
    // html += "</body></html>";
    server.send(200, "text/html", sendHTML(4));
  });

  server.on("/forward", HTTP_GET, []() { controlMotors(FORWARD); });
  server.on("/backward", HTTP_GET, []() { controlMotors(BACKWARD); });
  server.on("/left", HTTP_GET, []() { controlMotors(LEFT); });
  server.on("/right", HTTP_GET, []() { controlMotors(RIGHT); });
  server.on("/stop", HTTP_GET, []() { controlMotors(STOP); });

  server.begin();
  Serial.println("HTTP server started");
}

void loop() { server.handleClient(); }

void controlMotors(int command) {
  switch (command) {
  case FORWARD:
    digitalWrite(AIN1, HIGH);
    digitalWrite(AIN2, LOW);
    digitalWrite(BIN1, HIGH);
    digitalWrite(BIN2, LOW);
    break;
  case BACKWARD:
    digitalWrite(AIN1, LOW);
    digitalWrite(AIN2, HIGH);
    digitalWrite(BIN1, LOW);
    digitalWrite(BIN2, HIGH);
    break;
  case LEFT:
    digitalWrite(AIN1, LOW);
    digitalWrite(AIN2, HIGH);
    digitalWrite(BIN1, HIGH);
    digitalWrite(BIN2, LOW);
    break;
  case RIGHT:
    digitalWrite(AIN1, HIGH);
    digitalWrite(AIN2, LOW);
    digitalWrite(BIN1, LOW);
    digitalWrite(BIN2, HIGH);
    break;
  case STOP:
    digitalWrite(AIN1, LOW);
    digitalWrite(AIN2, LOW);
    digitalWrite(BIN1, LOW);
    digitalWrite(BIN2, LOW);
    break;
  }
  server.send(200, "text/html", sendHTML(command));
}

String sendHTML(int moveState) {
  String html = "<html>";
  // html+="<head><meta http-equiv='refresh' content='5'/>\n";
  html+="<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">";
  html += "<title>ESP8266 drv8833 drive motor</title>\n";
  html+="<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}\n";
  html+="body{margin-top: 50px;} h1 {color: #444444;margin: 50px auto 30px;} h3 {color: #444444;margin-bottom: 50px;}\n";
  html+="</style>\n";
  html+="</head>\n";
  html += "<body><h1>Motor Control</h1>";
  html += "<a href=\"/forward\">前进</a><br>";
  html += "<a href=\"/backward\">后退</a><br>";
  html += "<a href=\"/left\">左转</a><br>";
  html += "<a href=\"/right\">右转</a><br>";
  html += "<a href=\"/stop\">停止</a><br>";
  html += "<h1>Motor State</h1>";

  switch (moveState) {
  case FORWARD:
    html += "<p>Move Status: 前进</p>\n";
    break;
  case BACKWARD:
    html += "<p>Button Status: 后退</p>\n";
    break;
  case LEFT:
    html += "<p>Button Status: 左转</p>\n";
    break;
  case RIGHT:
    html += "<p>Button Status: 右转</p>\n";
    break;
  case STOP:
    html += "<p>Button Status: 停止</p>\n";
    break;
  }
  html += "</body></html>";
  return html;
}
```