使用 Arduino Uno 和蓝牙实现遥控小车：分步指南

组件与物料

所需工具与设备

应用与在线服务

项目简介

我想远程控制一辆小车，尝试了多种方案后决定采用蓝牙通信。准备好所需硬件并编写软件后，这个项目成为了我在 Hackster 上发布的第二个作品。

代码

Arduino 代码

char buffer[67];
byte Pino02 = 2;
byte Pino03 = 3;
byte Pino04 = 4;
byte Pino05 = 5;
byte Pino06 = 6;
byte Pino07 = 7;
byte Pino12 = 12;
byte Pino13 = 13;

void setup() {
  Serial.begin(9600);
  Serial.flush();
  pinMode(Pino02, OUTPUT);
  pinMode(Pino03, OUTPUT);
  pinMode(Pino04, OUTPUT);
  pinMode(Pino05, OUTPUT);
  pinMode(Pino06, OUTPUT);
  pinMode(Pino07, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
}

void loop() {
  if (Serial.available() > 0) {
    int index = 0;
    delay(100); // 等待缓冲区填满
    int numChar = Serial.available();
    if (numChar > 65) numChar = 65;
    while (numChar--) {
      buffer[index++] = Serial.read();
    }
    splitString(buffer);
  }
}

void splitString(char* data) {
  Serial.print("接收数据: ");
  Serial.println(data);
  char* parameter;
  parameter = strtok(data, " ,");
  while (parameter != NULL) {
    setLED(parameter);
    parameter = strtok(NULL, " ,");
  }
  // 清空缓冲区
  for (int x = 0; x < 66; x++) {
    buffer[x] = '\0';
  }
  Serial.flush();
}

void setLED(char* data) {
  // 前进左转
  if (data[0] == 'A') {
    analogWrite(9, 50); analogWrite(10, 50);
    digitalWrite(Pino02, LOW); digitalWrite(Pino03, HIGH);
    digitalWrite(Pino04, HIGH); digitalWrite(Pino05, LOW);
    digitalWrite(12, HIGH); digitalWrite(13, LOW);
  }
  // 前进右转
  if (data[0] == 'C') {
    analogWrite(9, 50); analogWrite(10, 50);
    digitalWrite(Pino02, HIGH); digitalWrite(Pino03, LOW);
    digitalWrite(Pino04, LOW); digitalWrite(Pino05, HIGH);
    digitalWrite(12, HIGH); digitalWrite(13, LOW);
  }
  // 后退1
  if (data[0] == 'B') {
    analogWrite(9, 25); analogWrite(10, 25);
    digitalWrite(Pino02, HIGH); digitalWrite(Pino03, LOW);
    digitalWrite(Pino04, HIGH); digitalWrite(Pino05, LOW);
    digitalWrite(12, LOW); digitalWrite(13, HIGH);
  }
  // 后退2
  if (data[0] == 'M') {
    analogWrite(9, 75); analogWrite(10, 75);
    digitalWrite(Pino02, HIGH); digitalWrite(Pino03, LOW);
    digitalWrite(Pino04, HIGH); digitalWrite(Pino05, LOW);
    digitalWrite(12, LOW); digitalWrite(13, HIGH);
  }
  // 后退3
  if (data[0] == 'N') {
    analogWrite(9, 125); analogWrite(10, 125);
    digitalWrite(Pino02, HIGH); digitalWrite(Pino03, LOW);
    digitalWrite(Pino04, HIGH); digitalWrite(Pino05, LOW);
    digitalWrite(12, LOW); digitalWrite(13, HIGH);
  }
  // 后退4
  if (data[0] == 'P') {
    analogWrite(9, 175); analogWrite(10, 175);
    digitalWrite(Pino02, HIGH); digitalWrite(Pino03, LOW);
    digitalWrite(Pino04, HIGH); digitalWrite(Pino05, LOW);
    digitalWrite(12, LOW); digitalWrite(13, HIGH);
  }
  // 后退5
  if (data[0] == 'L') {
    analogWrite(9, 225); analogWrite(10, 225);
    digitalWrite(Pino02, HIGH); digitalWrite(Pino03, LOW);
    digitalWrite(Pino04, HIGH); digitalWrite(Pino05, LOW);
    digitalWrite(12, LOW); digitalWrite(13, HIGH);
  }
  // 前进1
  if (data[0] == 'D') {
    analogWrite(9, 25); analogWrite(10, 25);
    digitalWrite(Pino02, LOW); digitalWrite(Pino03, HIGH);
    digitalWrite(Pino04, LOW); digitalWrite(Pino05, HIGH);
    digitalWrite(12, HIGH); digitalWrite(13, LOW);
  }
  // 前进2
  if (data[0] == 'H') {
    analogWrite(9, 75); analogWrite(10, 75);
    digitalWrite(Pino02, LOW); digitalWrite(Pino03, HIGH);
    digitalWrite(Pino04, LOW); digitalWrite(Pino05, HIGH);
    digitalWrite(12, HIGH); digitalWrite(13, LOW);
  }
  // 前进3
  if (data[0] == 'I') {
    analogWrite(9, 125); analogWrite(10, 125);
    digitalWrite(Pino02, LOW); digitalWrite(Pino03, HIGH);
    digitalWrite(Pino04, LOW); digitalWrite(Pino05, HIGH);
    digitalWrite(12, HIGH); digitalWrite(13, LOW);
  }
  // 前进4
  if (data[0] == 'K') {
    analogWrite(9, 175); analogWrite(10, 175);
    digitalWrite(Pino02, LOW); digitalWrite(Pino03, HIGH);
    digitalWrite(Pino04, LOW); digitalWrite(Pino05, HIGH);
    digitalWrite(12, HIGH); digitalWrite(13, LOW);
  }
  // 前进5
  if (data[0] == 'L') {
    analogWrite(9, 225); analogWrite(10, 225);
    digitalWrite(Pino02, LOW); digitalWrite(Pino03, HIGH);
    digitalWrite(Pino04, LOW); digitalWrite(Pino05, HIGH);
    digitalWrite(12, HIGH); digitalWrite(13, LOW);
  }
  // 停止
  if (data[0] == 'U') {
    digitalWrite(Pino02, LOW); digitalWrite(Pino03, LOW);
    digitalWrite(Pino04, LOW); digitalWrite(Pino05, LOW);
    digitalWrite(12, LOW); digitalWrite(13, LOW);
  }
  // 慢速前进
  if (data[0] == 'E') {
    analogWrite(9, 50); analogWrite(10, 50);
    digitalWrite(Pino02, LOW); digitalWrite(Pino03, HIGH);
    digitalWrite(Pino04, LOW); digitalWrite(Pino05, HIGH);
  }
  // 慢速后退
  if (data[0] == 'F') {
    analogWrite(9, 50); analogWrite(10, 50);
    digitalWrite(Pino02, HIGH); digitalWrite(Pino03, LOW);
    digitalWrite(Pino04, HIGH); digitalWrite(Pino05, LOW);
  }
}

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