基于ESP32的遥控小车

news2024/9/25 17:21:58

1.ESP32简介

2.项目构思

3.项目所需材料

4.代码示例

5.实物运行

1.ESP32简介

ESP32是一个集成天线和射频巴伦、功率放大器、低噪声放大器、滤波器和电源管理模块。整个解决方案占用的印刷电路板面积最少。该板采用台积电40nm低功耗技术的2.4GHz双模Wi-Fi和蓝牙芯片，功率和射频性能最佳，安全可靠，可扩展到各种应用。

2.项目构思

使用esp32连接到本地局域网，通过控制高低电信号的输入和输出，实现对马达前进后退与停止的控制。

3.项目所需材料

ESP32开发板*1

130电机DC3V*2

L298N电机驱动板*1

导线若干

输出功率为5V3A的移动电源

4.代码示例

#include <Arduino.h>
#include <WiFi.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>

// 马达A
int motor1Pin1 = 27; 
int motor1Pin2 = 26; 
int enable1Pin = 14; 

// 马达B
int motor2Pin1 = 33; 
int motor2Pin2 = 32; 
int enable2Pin = 25; 

// 替换成你的WiFi信息
const char* ssid = "名称";
const char* password = "密码";

// 开放80端口
AsyncWebServer server(80);

//web界面的格式和信息
const char index_html[] PROGMEM = R"rawliteral(
  <!DOCTYPE html>
  <html>
    <head>
      <title>ESP IOT DASHBOARD</title>
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <link rel="stylesheet" type="text/css" href="style.css">
      <link rel="icon" type="image/png" href="favicon.png">
      <script src="https://kit.fontawesome.com/0294e3a09e.js" crossorigin="anonymous"></script>
      <style>
      html {
      font-family: Arial, Helvetica, sans-serif;
      text-align: center;
      }
      h1 {
          font-size: 1.8rem;
          color: white;
      }

      .topnav {
          overflow: hidden;
          background-color: #0A1128;
      }
      body {
          margin: 0;
      }
      .content {
          padding: 50px;
      }
      .card-grid {
          max-width: 800px;
          margin: 0 auto;
          display: grid;
          grid-gap: 2rem;
          grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      }
      .card {
          background-color: white;
          box-shadow: 2px 2px 12px 1px rgba(140,140,140,.5);
      }
      .card-title {
          font-size: 1.2rem;
          font-weight: bold;
          color: #034078
      }
      .state {
          font-size: 1.2rem;
          color:#1282A2;
      }
      button {
          border: none;
          color: #FEFCFB;
          padding: 15px 32px;
          text-align: center;
          font-size: 16px;
          width: 150px;
          border-radius: 4px;
          transition-duration: 0.4s;
      }
      .button-on {
          background-color:#034078;
      }
      .button-on:hover {
          background-color: #1282A2;
      }
      .button-off {
          background-color:#858585;
      }
      .button-off:hover {
          background-color: #252524;
      }
      .button-stop {
          background-color:#5e0f0f;
          width: 100%;
      }
      .button-stop:hover {
          background-color: #9b332c;
      }
      </style>
    </head>
    <body>
      <div class="topnav">
        <h1>CONTROL DC MOTORS</h1>
      </div>
      <div class="content">
        <div class="card-grid">
          <div class="card">
            <p class="card-title"><i class="fa-solid fa-gear"></i> DC Motor A</p>
            <p>
              <a href="forwardA"><button class="button-on"><i class="fa-solid fa-arrow-up"></i> FORWARD</button></a>
              <a href="backwardA"><button class="button-off"><i class="fa-solid fa-arrow-down"></i> BACKWARD</button></a>
            </p>
            <p>
              <a href="stopA"><button class="button-stop"><i class="fa-solid fa-stop"></i> STOP</button></a>
            </p>
          </div>
          <div class="card">
            <p class="card-title"><i class="fa-solid fa-gear"></i> DC Motor B</p>
            <p>
              <a href="forwardB"><button class="button-on"><i class="fa-solid fa-arrow-up"></i> FORWARD</button></a>
              <a href="backwardB"><button class="button-off"><i class="fa-solid fa-arrow-down"></i> BACKWARD</button></a>
            </p>
            <p>
              <a href="stopB"><button class="button-stop"><i class="fa-solid fa-stop"></i> STOP</button></a>
            </p>
          </div>
        </div>
      </div>
    </body>
</html>
)rawliteral";
//连接WiFi
void initWiFi() {
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.println("Connecting to WiFi ..");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print('.');
    delay(1000);
  }
  Serial.println(WiFi.localIP());
}
//A马达前进
void moveForwardA(){
  Serial.println("Motor A Moving Forward");
  digitalWrite(enable1Pin, HIGH);
  digitalWrite(motor1Pin1, LOW);
  digitalWrite(motor1Pin2, HIGH);
}
//A马达后退
void moveBackwardA(){
  Serial.println("Motor A Moving Backward");
  digitalWrite(enable1Pin, HIGH);
  digitalWrite(motor1Pin1, HIGH);
  digitalWrite(motor1Pin2, LOW);
}
//A马达停止
void stopMotorA(){
  Serial.println("Motor A Stopped");
  digitalWrite(enable1Pin, LOW);
  digitalWrite(motor1Pin1, LOW);
  digitalWrite(motor1Pin2, LOW);
}
//B马达前进
void moveForwardB(){
  Serial.println("Motor B Moving Forward");
  digitalWrite(enable2Pin, HIGH);
  digitalWrite(motor2Pin1, LOW);
  digitalWrite(motor2Pin2, HIGH);
}
//B马达后退
void moveBackwardB(){
  Serial.println("Motor B Moving Backward");
  digitalWrite(enable2Pin, HIGH);
  digitalWrite(motor2Pin1, HIGH);
  digitalWrite(motor2Pin2, LOW);
}
//B马达停止
void stopMotorB(){
  Serial.println("Motor B Stopped");
  digitalWrite(enable2Pin, LOW);
  digitalWrite(motor2Pin1, LOW);
  digitalWrite(motor2Pin2, LOW);
}

void setup() {
  Serial.begin(115200);

  // Set motor pins as outputs
  pinMode(motor1Pin1, OUTPUT);
  pinMode(motor1Pin2, OUTPUT);
  pinMode(enable1Pin, OUTPUT);
  pinMode(motor2Pin1, OUTPUT);
  pinMode(motor2Pin2, OUTPUT);
  pinMode(enable2Pin, OUTPUT);

  initWiFi();

  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send(200, "text/html", index_html);
  });

  server.on("/forwardA", HTTP_GET, [](AsyncWebServerRequest *request) {
    moveForwardA();
    request->send(200, "text/html", index_html);
  }); 

  server.on("/backwardA", HTTP_GET, [](AsyncWebServerRequest *request) {
    moveBackwardA();
    request->send(200, "text/html", index_html);
  });

  // Route to set GPIO state to LOW (inverted logic for ESP8266)
  server.on("/stopA", HTTP_GET, [](AsyncWebServerRequest *request) {
    stopMotorA();
    request->send(200, "text/html", index_html);
  });
  server.on("/forwardB", HTTP_GET, [](AsyncWebServerRequest *request) {
    moveForwardB();
    request->send(200, "text/html", index_html);
  }); 

  server.on("/backwardB", HTTP_GET, [](AsyncWebServerRequest *request) {
    moveBackwardB();
    request->send(200, "text/html", index_html);
  });

  // Route to set GPIO state to LOW (inverted logic for ESP8266)
  server.on("/stopB", HTTP_GET, [](AsyncWebServerRequest *request) {
    stopMotorB();
    request->send(200, "text/html", index_html);
  });

  server.begin();
}

void loop() {
  
}