void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("宝贝我好了");
  pinMode(22, OUTPUT);
  pinMode(23, OUTPUT);
  pinMode(24, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(26, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (Serial.available()) {
    String ruxin = Serial.readStringUntil('\n');
    yisen(ruxin);
  }
}

void yisen(String tian) {
  int chi = tian.toInt();
  Serial.println(tian);
  digitalWrite(chi, HIGH);
}