ESP32-S3 7 Segment Display (1 Digit) with Arduino IDE

/*
  Filename: ESP32-S3_7segment_display_with_dp.ino
  Description: Display digits 0–9 on a 7-segment display (Common Cathode or Anode) using ESP32-S3 with DP control
  Author: www.oceanlabz.in
  Modification: 1/4/2025
*/

// Choose type: "CC" for Common Cathode, "CA" for Common Anode
String commonType = "CC";  // Change to "CA" if you're using Common Anode

// Define ESP32-S3 GPIO pins connected to segments a-g and DP
const int a = 4;
const int b = 5;
const int c = 6;
const int d = 7;
const int e = 8;
const int f = 9;
const int g = 10;
const int dp = 11;  // Decimal point pin

// Segment patterns for digits 0 to 9 (Standard pattern)
byte digits[10][7] = {
  // a, b, c, d, e, f, g
  {1, 1, 1, 1, 1, 1, 0},  // 0
  {0, 1, 1, 0, 0, 0, 0},  // 1
  {1, 1, 0, 1, 1, 0, 1},  // 2
  {1, 1, 1, 1, 0, 0, 1},  // 3
  {0, 1, 1, 0, 0, 1, 1},  // 4
  {1, 0, 1, 1, 0, 1, 1},  // 5
  {1, 0, 1, 1, 1, 1, 1},  // 6
  {1, 1, 1, 0, 0, 0, 0},  // 7
  {1, 1, 1, 1, 1, 1, 1},  // 8
  {1, 1, 1, 1, 0, 1, 1}   // 9
};

// Segment pin array a–g
const int segmentPins[7] = {a, b, c, d, e, f, g};

void setup() {
  for (int i = 0; i < 7; i++) {
    pinMode(segmentPins[i], OUTPUT);
  }

  pinMode(dp, OUTPUT);
  digitalWrite(dp, LOW);  // Turn off decimal point at start
}

void loop() {
  for (int i = 0; i < 10; i++) {
    displayDigit(i);
    
    // Blink decimal point
    digitalWrite(dp, getLogicLevel(1));
    delay(500);
    digitalWrite(dp, getLogicLevel(0));
    delay(500);
  }
}

// Function to display digits 0–9
void displayDigit(int num) {
  for (int i = 0; i < 7; i++) {
    digitalWrite(segmentPins[i], getLogicLevel(digits[num][i]));
  }
}

// Invert signal if Common Anode
int getLogicLevel(int value) {
  if (commonType == "CA") {
    return value == 1 ? LOW : HIGH;  // Invert logic for CA
  } else {
    return value == 1 ? HIGH : LOW;  // Normal logic for CC
  }
}