#include <FastLED.h>

// How many leds in your strip?
#define NUM_LEDS 38

// For led chips like WS2812, which have a data line, ground, and power, you just
// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806 define both DATA_PIN and CLOCK_PIN
// Clock pin only needed for SPI based chipsets when not using hardware SPI
#define DATA_PIN 26

// Define the array of leds
CRGB leds[NUM_LEDS];
unsigned long data_in = 0;
unsigned long data_off= 50;
int NUM = 10;
unsigned long time_on = millis();
unsigned long time_off = millis();

void setup() {
  Serial.begin(115200);
  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);  // GRB ordering is assumed
  delay(1000); // give me time to bring up serial monitor
  Serial.println("ESP32 Touch Test");
  for(int i=0; i<NUM; i++) data_in+=touchRead(4);
  data_in = data_in/NUM;
  data_off = data_in;
  data_in = 0;
}

void loop() {
  for(int i=0; i<NUM; i++) data_in+=touchRead(4);
  data_in = data_in/NUM;
  if (data_in<data_off-1)
    {
      time_off = millis();
      if((millis()-time_on)>=100)
        {
          for(int i=0; i<NUM_LEDS; i++) leds[i] = CRGB::White;
          time_on = millis();
        }
    }
  else
    {
      time_on = millis();
      if((millis()-time_off)>=100)
        {
          for(int i=0; i<NUM_LEDS; i++) leds[i] = CRGB::Black;
          time_off = millis();
        }
    }
  FastLED.show();
  Serial.println(data_in);  // get value of Touch 0 pin = GPIO 4
  data_in = 0;
}