fakeycapsense_demo.ino

// fakeycapsense_demo.ino -- implement a fakey capsense touch sensor using same technique as in CircuitPython
// 2 Aug 2022 - @todbot / Tod Kurt

///////////////
class FakeyTouch 
{
  public:
  FakeyTouch( int apin, int athreshold = 200 ) {
    pin = apin;
    thold = athreshold;
  }  
  void begin() {
    baseline = readTouch();
  }
  int readTouch() {
    pinMode(pin, OUTPUT);
    digitalWrite(pin,HIGH);
    pinMode(pin,INPUT);
    int i = 0;
    while( digitalRead(pin) ) { i++; }
    return i;
  }
  bool isTouched() {
    return (readTouch() > baseline + thold);
  }
  int baseline;
  int thold;
  int pin; 
};
///////////////////

const int touchpin_F = 16; // GP16

FakeyTouch touchF = FakeyTouch( touchpin_F );


void setup() {
  Serial.begin(115200);
  pinMode(PIN_LED, OUTPUT);
  Serial.println("hello world\n");
}

void loop() {
  if( touchF.isTouched() ) { 
    Serial.print("TOUCH!\n");
  }
  delay(100);
}