我也遇到過，不知什么原因

可以連上串口，打上日誌，再用手機調(diào)試，我的繼電器控制是毫秒級的。所以肯定不是貝殼這邊問題，很有可能是網(wǎng)速，或者代碼的條件判斷？

void setup() {

  // initialize digital pin 13 as an output.

  pinMode(5, OUTPUT);

  pinMode(4, OUTPUT);

}

// the loop function runs over and over again forever

void loop() {

  digitalWrite(5, HIGH);   // turn the LED on (HIGH is the voltage level)

  delay(1000);              // wait for a second

  digitalWrite(5, LOW);    // turn the LED off by making the voltage LOW

  delay(1000);              // wait for a second


  digitalWrite(4, HIGH);   

  delay(1000);

  digitalWrite(4, LOW);

  delay(1000); 

}

你代碼里面寫了延遲

你自己代碼寫了延時啊，怎么會不慢