求指教，arduino串口问题

我要给一个模块发送多条指令，代码如下，请指教：
#include "Ultrasonic.h"
#define T 500
#define DL 3000
void setup()
{
Serial.begin(115200);
ledLeft.off();
ledRight.off();
delay(DL);
ledLeft.on();
Serial.println(String("CMD+SENSOR_SETUP"));
Serial.println("\n");
delay(T);
Serial.println(String("CMD+VISION_TYPE=BALL"));
Serial.println("\n");
delay(T);
Serial.println(String("CMD+SENSOR_SAVE"));
Serial.println("\n");
delay(T);
Serial.println(String("CMA+SENSOR_EXIT"));
Serial.println("\n");
delay(T);
}
void loop() {
}