ESP32CAM built-in LED control

依照下圖ESP32_CAM線路圖, 可以發現GPIO33接了一顆 red led, GPIO4接到FLASH_LED. 因此這兩顆LED都可以為我們所用

規劃 GPIO33的LED開機後閃爍讓使用者知道ESP32CAM已在運行當中

GPIO4的FLASH LED由IO13腳位來控制ON/OFF

最簡單的方式

/** GPIO for led */

#define LED_BUILTIN 4

#define LED_IN 33

int ledButton = 13;

int on_off_count = 0;

void setup() {

  // put your setup code here, to run once:

  pinMode(LED_BUILTIN, OUTPUT);

  pinMode(LED_IN, OUTPUT);

  pinMode(ledButton, INPUT_PULLUP);

}

void loop() {

  // put your main code here, to run repeatedly:

  enableLED();

  if ((digitalRead(ledButton) == LOW))

  {

    //Serial.println("13");

    on_off_count++;

  }

  

  digitalWrite(LED_IN, LOW);

  delay(200);

  digitalWrite(LED_IN, HIGH);

  delay(200);

}

void enableLED(void)

{

  if(on_off_count==1)

  {

    digitalWrite(LED_BUILTIN, HIGH);

  }

  if(on_off_count==2)

  {

    digitalWrite(LED_BUILTIN, LOW);

  }

  if(on_off_count>2)

  {

    on_off_count=0;

  }

}

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若有問題歡迎留言討論!!!

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