Arduino基础

串口通信

int i = 0;
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(500);                       // wait for a second
 
  //Serial.println(i++);
  if(Serial.available()!=0){
        Serial.println(Serial.read());
  }
}

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sudo busybox microcom -s 9600 /dev/ttyUSB0
-s 波特率
-t 超时退出时间 ，不加-t就是一直等待接收

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echo “123456” > /dev/ttyS1

参考：
https://www.bilibili.com/video/BV1k4411J7XD?p=3