Using array to code touch pin numbers

Projects General Guidance
1

I'm using an array to read each touch pin on a ESP32 but when it runs it reads pin zero. I'm not using the "T0" in my array. Just using GPIO pin numbers.

Any ideas why it would read "Touch Pin Number: 0.00" ?

Serial Monitor:
Touch Pin Number: 0.00 AVG of 3 measurements: 1
Touch Pin Number: 2.00 AVG of 3 measurements: 98
Touch Pin Number: 4.00 AVG of 3 measurements: 88
Touch Pin Number: 12.00 AVG of 3 measurements: 123
Touch Pin Number: 13.00 AVG of 3 measurements: 111
Touch Pin Number: 14.00 AVG of 3 measurements: 132
Touch Pin Number: 15.00 AVG of 3 measurements: 105
Touch Pin Number: 27.00 AVG of 3 measurements: 133
Touch Pin Number: 32.00 AVG of 3 measurements: 140
Touch Pin Number: 33.00 AVG of 3 measurements: 139
Touch Pin Number: 0.00 AVG of 3 measurements: 1
Touch Pin Number: 2.00 AVG of 3 measurements: 97

Code:

int Value_A;
int Value_B;
int Value_C;
int TOTAL_Value; // Total Value of A B C
int AVERAGE_Value;  // Average value of A B C
const int THRESHOLD = 30; // Used in if statement
float TouchNumbers[9] = {2, 4, 12, 13, 14, 15, 27, 32, 33}; // array of touch pin numbers

void setup() {
  Serial.begin (9600);
}

void loop() {
    for (int Touch = 0; Touch <= 9; Touch++) { // Increases touch pin number that corresponding to array above.

    Value_A = touchRead(TouchNumbers[Touch]); // read touch pin
    delay(100);
    Value_B = touchRead(TouchNumbers[Touch]);
    delay(100);
    Value_C = touchRead(TouchNumbers[Touch]);

    TOTAL_Value = (Value_A + Value_B + Value_C);
    AVERAGE_Value = (TOTAL_Value / 3);

    Serial.print ("Touch Pin Number: ");
    Serial.print (TouchNumbers[Touch]);
    Serial.print ("     AVG of 3 measurements: ");
    Serial.println (AVERAGE_Value);
    Serial.println ("");
  
    delay (3000); // Slows down serial monitor
  }
}
2

Don't read outside of the array, change Touch <= 9 to Touch < 9 .

3

As @guix said... you are reading past the end of the array. Index is 0 to 8, so

for (int Touch = 0; Touch < 9; Touch++)
4

Thank you. That was easy to fix! I feel like an idiot.