/*
  Author: Elena C. K.
  Description: Attiny84 to control DotStar LED strip from Adafruit. It only have enough byte to control approximately 32 LEDs.
  Use the FastLED library to program.
  IDE Attiny84 Physical Pin
  0      PA0           13 - TX
  1      PA1           12 - RX
  2      PA2           11 - OPAMP OUT
  3      PA3           10
  4      PA4            9
  5      PA5            8
  6      PA6            7
  7      PA7            6 - D1
  8      PB2            5 - C1
  9      PB1            3
  10      PB0           2
*/

#include <FastLED.h>
#define LED_DT 7                                             // Serial data pin
#define LED_CK 8                                             // Serial clock pin for APA102 or WS2801
#define COLOR_ORDER BGR                                       // It's GRB for WS2812B
#define LED_TYPE APA102                                       // What kind of strip are you using (APA102, WS2801 or WS@2812B
#define NUM_LEDS 72
#define MIC 2
#define DC_OFFSET 512

#include <SoftwareSerial.h>
#define RX 1
#define TX 0
CRGB leds[NUM_LEDS];
SoftwareSerial Serial(TX, RX);

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


  pinMode(MIC, INPUT);
}

void loop() {
  int sample = 0;                                            // Current sample. Starts with negative values, which is why it's signed.
  sample = analogRead(MIC) - DC_OFFSET;
  sample = abs(sample);
  Serial.println(sample);

}