ESP32(MH-ET LIVE ESP32 MiniKIT)のタッチセンサー

ESP32には１０本ものタッチセンサーがあります。しかも、インタラプト関数が用意されているので便利に使えそうです。

ESP32の安価でコンパクトなボードを購入したので試しに使ってみようと思います。特にアフィリエイトが得られるわけではありませんが、購入先は下記URLです。

https://ja.aliexpress.com/item/MH-ET-LIVE-D1-mini-ESP32-ESP-32-WiFi-Bluetooth-Internet-of-Things-development-board-based/32816658883.html?spm=a2g0s.9042311.0.0.u50SMy

このボードはLチカ用LEDが付いているのが原因だと思いますが、T2は使えません。また、T8とT9が入れ替わっているようです。

T0–IO04
T1–IO0
T3–TDO
T4–TCK
T5–TDI
T6–TMS
T7–IO27
T8–IO32
T9–IO33

int threshold[9] = {12,12,12,12,12,12,12,12,12,};
bool touchDetected[9] ={false,false,false,false,false,false,false,false,false};
int T[9]={T0,T1,T3,T4,T5,T6,T7,T9,T8};


void gotTouch0(){
  touchDetected[0] = true;
}
void gotTouch1(){
  touchDetected[1] = true;
}
void gotTouch2(){
  touchDetected[2] = true;
}
void gotTouch3(){
  touchDetected[3] = true;
}
void gotTouch4(){
  touchDetected[4] = true;
}
void gotTouch5(){
  touchDetected[5] = true;
}
void gotTouch6(){
  touchDetected[6] = true;
}
void gotTouch7(){
  touchDetected[7] = true;
}
void gotTouch8(){
  touchDetected[8] = true;
}


void setup() {
  Serial.begin(115200);
  delay(1000); // give me time to bring up serial monitor
  Serial.println("TouchInterrupt9");
  touchAttachInterrupt(T[0], gotTouch0, threshold[0]);
  touchAttachInterrupt(T[1], gotTouch1, threshold[1]);
  touchAttachInterrupt(T[2], gotTouch2, threshold[2]);
  touchAttachInterrupt(T[3], gotTouch3, threshold[3]);
  touchAttachInterrupt(T[4], gotTouch4, threshold[4]);
  touchAttachInterrupt(T[5], gotTouch5, threshold[5]);
  touchAttachInterrupt(T[6], gotTouch6, threshold[6]);
  touchAttachInterrupt(T[7], gotTouch7, threshold[7]);
  touchAttachInterrupt(T[8], gotTouch8, threshold[8]);
}

void loop(){
  int value;
  for(int i=0;i<9;i++){
    if(touchDetected[i] && ((value=touchRead(T[i]))<threshold[i])){
      touchDetected[i]=false;
      Serial.print(i);Serial.print(" detected with");
      Serial.println(value);
    }
  }
}

int threshold[9] = {12,12,12,12,12,12,12,12,12,};

bool touchDetected[9] ={false,false,false,false,false,false,false,false,false};

int T[9]={T0,T1,T3,T4,T5,T6,T7,T9,T8};

void gotTouch0(){

touchDetected[0] = true;

}

void gotTouch1(){

touchDetected[1] = true;

}

void gotTouch2(){

touchDetected[2] = true;

}

void gotTouch3(){

touchDetected[3] = true;

}

void gotTouch4(){

touchDetected[4] = true;

}

void gotTouch5(){

touchDetected[5] = true;

}

void gotTouch6(){

touchDetected[6] = true;

}

void gotTouch7(){

touchDetected[7] = true;

}

void gotTouch8(){

touchDetected[8] = true;

}

void setup() {

Serial.begin(115200);

delay(1000); // give me time to bring up serial monitor

Serial.println("TouchInterrupt9");

touchAttachInterrupt(T[0], gotTouch0, threshold[0]);

touchAttachInterrupt(T[1], gotTouch1, threshold[1]);

touchAttachInterrupt(T[2], gotTouch2, threshold[2]);

touchAttachInterrupt(T[3], gotTouch3, threshold[3]);

touchAttachInterrupt(T[4], gotTouch4, threshold[4]);

touchAttachInterrupt(T[5], gotTouch5, threshold[5]);

touchAttachInterrupt(T[6], gotTouch6, threshold[6]);

touchAttachInterrupt(T[7], gotTouch7, threshold[7]);

touchAttachInterrupt(T[8], gotTouch8, threshold[8]);

}

void loop(){

int value;

for(int i=0;i<9;i++){

if(touchDetected[i] && ((value=touchRead(T[i]))<threshold[i])){

touchDetected[i]=false;

Serial.print(i);Serial.print(" detected with");

Serial.println(value);

}

フラットケーブルを使ったら60ぐらいあったタッチセンサーの出力が20ぐらいまで低下して、検知できるギリギリですがなんとか使えています。

(18.02.11)