三种方式手动重启Arduino

1.Arduino板上重新编写代码时，Arduino将重新设置
2.Arduino软件中打开串行终端，同时将Arduino板连接到计算机。打开串行终端时，Arduino会自动重置
3.按下复位按钮

两种方式自动重启Arduino

详情见：
https://www.theengineeringprojects.com/2015/10/upload-bootloader-atmega328.html

1.使用Arduino板上的RESET引脚以编程方式重新设置Arduino，就是利用一个数字口，代码运行到那的时候就将REST置低
这里利用数字口D2

int Reset = 2;

void setup() {  
  digitalWrite(Reset, HIGH);
  delay(200); 
  pinMode(Reset, OUTPUT);     
  Serial.begin(9600);
  Serial.println("How to Reset Arduino Programmatically");
  delay(200);
}
void loop() 
{
  Serial.println("A");
  delay(1000);               
  Serial.println("B");
  delay(1000);               
  Serial.println("Now we are Resetting Arduino Programmatically");
  Serial.println();
  delay(1000);
  digitalWrite(Reset, LOW);
  Serial.println("Arduino will never reach there.");

}

说明：
–In this method, we are not gonna use any hardware pin, instead we will do everything in programming.
–Arduino has a builtin function named as resetFunc() which we need to declare at address 0 and when we execute this function Arduino gets reset automatically.
–So, no need of doing anything in hardware and simply upload the below code in your Arduino board.

void(* resetFunc) (void) = 0;

void setup() {     
  Serial.begin(9600);
  Serial.println("How to Reset Arduino Programmatically");
  delay(200);
}

void loop() 
{
  Serial.println("A");
  delay(1000);               
  Serial.println("B");
  delay(1000);               
  Serial.println("Now we are Resetting Arduino Programmatically");
  Serial.println();
  delay(1000);
  resetFunc();
  Serial.println("Arrduino will never reach there.");

}