arduino四路循迹避障小车代码

当然，我可以为你介绍一下Arduino四路循迹避障小车的代码。以下是一个简单的示例代码：

// 定义引脚
const int leftSensorPin = A0;
const int middleSensorPin = A1;
const int rightSensorPin = A2;
const int leftMotorPin1 = 2;
const int leftMotorPin2 = 3;
const int rightMotorPin1 = 4;
const int rightMotorPin2 = 5;

// 设置阈值
const int threshold = 500;

void setup() {
  // 初始化引脚
  pinMode(leftSensorPin, INPUT);
  pinMode(middleSensorPin, INPUT);
  pinMode(rightSensorPin, INPUT);
  pinMode(leftMotorPin1, OUTPUT);
  pinMode(leftMotorPin2, OUTPUT);
  pinMode(rightMotorPin1, OUTPUT);
  pinMode(rightMotorPin2, OUTPUT);
}

void loop() {
  // 读取传感器值
  int leftSensorValue = analogRead(leftSensorPin);
  int middleSensorValue = analogRead(middleSensorPin);
  int rightSensorValue = analogRead(rightSensorPin);

  // 判断传感器值并控制小车运动
  if (leftSensorValue > threshold && middleSensorValue > threshold && rightSensorValue > threshold) {
    // 前进
    digitalWrite(leftMotorPin1, HIGH);
    digitalWrite(leftMotorPin2, LOW);
    digitalWrite(rightMotorPin1, HIGH);
    digitalWrite(rightMotorPin2, LOW);
  } else if (leftSensorValue > threshold && middleSensorValue < threshold && rightSensorValue > threshold) {
    // 左转
    digitalWrite(leftMotorPin1, LOW);
    digitalWrite(leftMotorPin2, HIGH);
    digitalWrite(rightMotorPin1, HIGH);
    digitalWrite(rightMotorPin2, LOW);
  } else if (leftSensorValue < threshold && middleSensorValue > threshold && rightSensorValue > threshold) {
    // 直行
    digitalWrite(leftMotorPin1, HIGH);
    digitalWrite(leftMotorPin2, LOW);
    digitalWrite(rightMotorPin1, HIGH);
    digitalWrite(rightMotorPin2, LOW);
  } else if (leftSensorValue > threshold && middleSensorValue > threshold && rightSensorValue < threshold) {
    // 右转
    digitalWrite(leftMotorPin1, HIGH);
    digitalWrite(leftMotorPin2, LOW);
    digitalWrite(rightMotorPin1, LOW);
    digitalWrite(rightMotorPin2, HIGH);
  } else {
    // 停止
    digitalWrite(leftMotorPin1, LOW);
    digitalWrite(leftMotorPin2, LOW);
    digitalWrite(rightMotorPin1, LOW);
    digitalWrite(rightMotorPin2, LOW);
  }
}

这段代码使用了三个红外线传感器来检测循迹和避障，根据传感器的值控制小车的运动。你可以根据实际情况进行调整和优化。