我试图用 Arduino IDE 设置我的第一个 ESP32 板。它适用于内置 LED,但不适用于引脚。这是我的代码:
int LED_BUILTIN = 2; // works fine
int LED_OUT = 25; // not working, even other pins
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
pinMode(LED_OUT, OUTPUT);
Serial.begin(115200);
}
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(1000); // wait for a second
digitalWrite(LED_OUT, HIGH);
// turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_OUT, LOW);
// turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
板载内置 LED 根据我的代码闪烁,但 GPIO 25 没有输出任何内容。我尝试了其他引脚,发现它们都不起作用。我碰巧尝试了 GPIO 4,发现它与内置 LED 一起闪烁。看起来 GPIO 4 连接到内置 LED。
那么我是否错过了设置引脚模式或其他任何内容?如何选择一个引脚并使其作为输出来闪烁面包板上的 LED?
提前致谢。