TecladoESP32.c

/*                                T0   T3  T4  T5
  T0  GPIO 4    T0                G4   G15 G13 G12
  T1  GPIO 0  nao usar
  T2  GPIO 2  nao usar            1    2   3    A  G14 T6
  T3  GPIO 15   T3                4    5   6    B  G27 T7
  T4  GPIO 13   T4                7    8   9    C  G32 T8
  T5  GPIO 12   T5                *    0   #    D  G33 T9
  T6  GPIO 14   T6
  T7  GPIO 27   T7
  T8  GPIO 32   T8
  T9  GPIO 33   T9
*/
#define THRESHOLD 70

  int col1 = 0;
  int col2 = 0;
  int col3 = 0;
  int col4 = 0;

  int row1 = 0;
  int row2 = 0;
  int row3 = 0;
  int row4 = 0;

//---------------------------------------------------------
void printout()
{
/*
     Serial.print("(T0) "); Serial.println(col1);  // get value using T0
     Serial.print("(T3) "); Serial.println(col2);  // get value using T3
     Serial.print("(T4) "); Serial.println(col3);  // get value using T4
     Serial.print("(T5) "); Serial.println(col4);  // get value using T5
     Serial.print("(T6) "); Serial.println(row1);  // get value using T6
     Serial.print("(T7) "); Serial.println(row2);  // get value using T7
     Serial.print("(T8) "); Serial.println(row3);  // get value using T8
     Serial.print("(T9) "); Serial.println(row4);  // get value using T9
*/
}
//---------------------------------------------------------
void setup()
{
  Serial.begin(115200);
  Serial.println("ESP32 Touch Test");
}
//---------------------------------------------------------
void loop()
{
  col1 = touchRead(T6);
  col2 = touchRead(T7);
  col3 = touchRead(T8);
  col4 = touchRead(T9);

  row1 = touchRead(T0);
  row2 = touchRead(T3);
  row3 = touchRead(T4);
  row4 = touchRead(T5);
  // printout();

  if ((col1 < THRESHOLD) && (row1 < THRESHOLD))
   { Serial.println("1"); printout();}
  if ((col1 < THRESHOLD) && (row2 < THRESHOLD))
   { Serial.println("2"); printout();}
  if ((col1 < THRESHOLD) && (row3 < THRESHOLD))
   { Serial.println("3"); printout();}
  if ((col1 < THRESHOLD) && (row4 < THRESHOLD))
   { Serial.println("A"); printout();}

  if ((col2 < THRESHOLD) && (row1 < THRESHOLD))
   { Serial.println("4"); printout();}
  if ((col2 < THRESHOLD) && (row2 < THRESHOLD))
   { Serial.println("5"); printout();}
  if ((col2 < THRESHOLD) && (row3 < THRESHOLD))
   { Serial.println("6"); printout();}
  if ((col2 < THRESHOLD) && (row4 < THRESHOLD))
   { Serial.println("B"); printout();}

  if ((col3 < THRESHOLD) && (row1 < THRESHOLD))
   { Serial.println("7"); printout();}
  if ((col3 < THRESHOLD) && (row2 < THRESHOLD))
   { Serial.println("8"); printout();}
  if ((col3 < THRESHOLD) && (row3 < THRESHOLD))
   { Serial.println("9"); printout();}
  if ((col3 < THRESHOLD) && (row4 < THRESHOLD))
   { Serial.println("C"); printout();}

  if ((col4 < THRESHOLD) && (row1 < THRESHOLD))
   { Serial.println("*"); printout();}
  if ((col4 < THRESHOLD) && (row2 < THRESHOLD))
   { Serial.println("0"); printout();}
  if ((col4 < THRESHOLD) && (row3 < THRESHOLD))
   { Serial.println("#"); printout();}
  if ((col4 < THRESHOLD) && (row4 < THRESHOLD))
   { Serial.println("D"); printout();}

  delay(10);
}