#include <Adafruit_NeoPixel.h>
#include <Adafruit_SSD1306.h>
#include <Wire.h>
#define SCREEN_WIDTH 128 
#define SCREEN_HEIGHT 64 
#define OLED_RESET     -1 
#define SCREEN_ADDRESS 0x3C 
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

const int buttonPin = 4; 
int buttonState, buttonStateOld = HIGH;
int motionSensor = 2, motionState, motionStateOld;
int ledcounter = 16;
int neopixel = 9;

Adafruit_NeoPixel lights(ledcounter, neopixel, NEO_GRB + NEO_KHZ800);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Wire.begin(6, 7);

  pinMode(buttonPin, INPUT);
  pinMode(motionSensor, INPUT);

  //lights.setBrigthness(200);
  lights.begin();

  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Don't proceed, loop forever
  }

  display.clearDisplay();
  display.setTextSize(1);           
  display.setTextColor(SSD1306_WHITE);      
  display.setCursor(0,0); 
  display.println("Hello, ESP32-C3!");
  display.display();

  lights.clear();
  for (int i = 0; i < ledcounter; i++) 
  {
    lights.setPixelColor(i, lights.Color(255, 0, 0));
    lights.show();  
    delay(500);
  }
  lights.clear();
  lights.show();

}

void loop() {
  buttonState = digitalRead(buttonPin);
  motionState = digitalRead(motionSensor);

  if(buttonState != buttonStateOld){
    if(buttonState == LOW){
       hello_esp();
    }
    
    buttonStateOld = buttonState;
  }

  if(motionState != motionStateOld){
    if(motionState == HIGH){
    Serial.println("Motion Sensor working. Hello, ESP32-C3!");
    }

    motionStateOld = motionState;
  }

  delay(100); // this speeds up the simulation
}

void hello_esp(){
  Serial.println("Hello, ESP32-C3!");
}


https://informatik.schule.de/rgb/RGB_farbmischer.html
https://colorspire.com/rgb-color-wheel/