1  // SPDX-FileCopyrightText: 2018 Erin St. Blaine for Adafruit Industries
  2  //
  3  // SPDX-License-Identifier: MIT
  4  
  5  #include "Adafruit_FreeTouch.h"
  6  #include "FastLED.h"
  7  
  8  #define CAPTOUCH_PIN A1
  9  #define NEOPIXEL_PIN 1
 10  #define LED_PIN 0
 11  #define NUM_LEDS    12
 12  
 13  #define LED_TYPE    WS2812
 14  #define COLOR_ORDER GRB
 15  CRGB leds[NUM_LEDS];
 16  
 17  int BRIGHTNESS=150;
 18  int touch = 500;    // Change this variable to something between your capacitive touch serial readouts for on and off
 19  
 20  long oldState = 0;
 21  int gHue=0;
 22  
 23  Adafruit_FreeTouch qt_1 = Adafruit_FreeTouch(CAPTOUCH_PIN, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);
 24  //Adafruit_FreeTouch qt_2 = Adafruit_FreeTouch(A2, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);
 25  
 26  
 27  
 28  void setup() {
 29    Serial.begin(115200);
 30  
 31    if (! qt_1.begin())  
 32      Serial.println("Failed to begin qt on pin A1");
 33    
 34     pinMode(LED_PIN, OUTPUT);  //initialize the LED pin
 35  
 36     FastLED.addLeds<WS2812, NEOPIXEL_PIN, COLOR_ORDER>(leds, NUM_LEDS);  // Set up neopixels with FastLED
 37     FastLED.setBrightness(BRIGHTNESS);
 38     FastLED.setMaxPowerInVoltsAndMilliamps(3,350);  //Constrain FastLED's power usage
 39  }
 40  
 41  void loop() {
 42    
 43    Serial.print(qt_1.measure());
 44    Serial.write(' ');
 45    checkpress();
 46    delay(20);
 47  }
 48  
 49  void checkpress() {
 50  
 51  // Get current button state.
 52   
 53      long newState =  qt_1.measure();  
 54      Serial.println(qt_1.measure());
 55     if (newState > touch && oldState < touch) {
 56      // Short delay to debounce button.
 57      delay(20);
 58      // Check if button is still low after debounce.
 59      long newState =  qt_1.measure(); }
 60  
 61   
 62    if (newState > touch ) {  
 63       dark();
 64       digitalWrite(LED_PIN, HIGH);
 65       delay(20);
 66      }
 67  
 68      else {
 69        rainbow();
 70        digitalWrite(LED_PIN, LOW);
 71        delay(20);
 72      }
 73  
 74     
 75      
 76    // Set the last button state to the old state.
 77    oldState = newState;
 78  
 79    // do some periodic updates
 80    EVERY_N_MILLISECONDS( 20 ) { gHue++; } // slowly cycle the "base color" through the rainbow
 81  } 
 82  
 83  void rainbow() 
 84  {
 85    // FastLED's built-in rainbow generator
 86    fill_rainbow( leds, NUM_LEDS, gHue, 7);
 87    FastLED.show();
 88    delay(20);
 89    
 90  }
 91  
 92  void dark()
 93  { 
 94    for(int i = 0; i < NUM_LEDS; i++) { 
 95    leds[i] = CRGB::Black; 
 96    FastLED.show();
 97    delay(20);
 98  }
 99  }
100