https://chaos.social/@ly2en/116261193466631291

sketch_binled.ino

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32

#define LED_RED 13
#define LED_BLUE 12
#define LED_WHITE 14
#define LED_GREEN 15
#define LED_YELLOW 16

Adafruit_SSD1306 OLED(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {
  Serial.begin(115200);
  Serial.println("Welcome");
    // Wait for display
  delay(500);
  
  OLED.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS);
  OLED.clearDisplay();

  OLED.setTextWrap(false);
  OLED.setTextSize(1);
  OLED.setTextColor(WHITE);
  OLED.setCursor(0,0);
  OLED.println("Labas pasauli");
 
  OLED.display(); 

  pinMode(LED_RED, OUTPUT);
  pinMode(LED_BLUE, OUTPUT); 
  pinMode(LED_WHITE, OUTPUT); 
  pinMode(LED_GREEN, OUTPUT); 
  pinMode(LED_YELLOW, OUTPUT);
}

void loop() {
  float voltage;
  voltage = analogRead(A0);
  Serial.print("Voltage: ");
  Serial.print(voltage, 3);
  Serial.println(" V");

  OLED.clearDisplay();
  OLED.setCursor(0,0);
  OLED.setTextSize(1);
  OLED.print("Labas, suk rata: ");
  OLED.println((int) voltage);

  int big_number = (int) ( voltage / 15) % 32;
  OLED.setTextSize(3);
  OLED.print("   ");
  OLED.println(big_number);
  OLED.display(); 

  // LEDS are here

  digitalWrite(LED_WHITE, bitRead(big_number,4));
  digitalWrite(LED_BLUE, bitRead(big_number,3));
  digitalWrite(LED_RED, bitRead(big_number,2));
  digitalWrite(LED_GREEN, bitRead(big_number,1));
  digitalWrite(LED_YELLOW, bitRead(big_number,0) );

  delay(500);
  
}