ESP32电容式触摸传感器引脚实例

本文展示了如何使用它Arduino IDE的ESP32触摸引脚。ESP触针可以感知任何带电物体的变化。它们通常被用来唤醒睡眠中的物体ESP32

* 触摸传感器通道 管脚           T0  GPIO4           T1  GPIO0           T2  GPIO2           T3  MTDO           T4  MTCK           T5  MTDI           T6  MTMS           T7  GPIO27           T8  32K_XN           T9  32K_XP  */ 

// set pin numbers const int touchPin = 4; // 使用 T0 获取数据 const int ledPin = 2; //板载led灯  // change with your threshold value const int threshold = 20; // variable for storing the touch pin value  int touchValue;  void setup(){ 
           Serial.begin(115200);   delay(1000); // give me time to bring up serial monitor   // initialize the LED pin as an output:   pinMode (ledPin, OUTPUT); }  void loop(){ 
           // read the state of the pushbutton value:   touchValue = touchRead(touchPin);   Serial.print(touchValue);   // check if the touchValue is below the threshold   // if it is, set ledPin to HIGH   if(touchValue < threshold){ 
             // turn LED on     digitalWrite(ledPin, HIGH);     Serial.println("触摸，灯亮")span class="token punctuation">;
  }
  else{ 
        
    // turn LED off
    digitalWrite(ledPin, LOW);
    Serial.println(" - LED off");
  }
  delay(500);
}