diff --git a/src/main.cpp.old b/src/main.cpp.old
deleted file mode 100644
index 13c63e7..0000000
--- a/src/main.cpp.old
+++ /dev/null
@@ -1,188 +0,0 @@
-// Cleaned up and fixed to use SoftwareSerial on D4 (RX) and D1 (TX)
-
-#include <Arduino.h>
-#include <SoftwareSerial.h>
-#include <DFMiniMp3.h>
-
-class Mp3Notify;
-
-// Use a DFPlayer variant that doesn't require ACKs on all commands
-// to avoid blocking on modules that don't ACK reset.
-typedef DFMiniMp3<SoftwareSerial, Mp3Notify, Mp3ChipIncongruousNoAck> DfMp3;
-// DFPlayer wiring: DF TX -> D4 (GPIO2), DF RX -> D1 (GPIO5)
-// Important: Do NOT use GPIO1/GPIO3 for DFPlayer if you want USB Serial.
-// SoftwareSerial args are (rx, tx) from ESP8266 perspective.
-SoftwareSerial mp3Serial(/*rx =*/D4, /*tx =*/D1);
-DfMp3 dfmp3(mp3Serial);
-
-// NOTE: These GPIO numbers currently map to GPIO0, GPIO1, GPIO2, GPIO3.
-// Adjust to your wiring; avoid using GPIO1 (TX0) and GPIO2 (D4) if used by DFPlayer.
-const int buzzerPins[4] = {0, 1, 2, 3};  // FIXME: update to match your wiring
-const int ledPins[4] = {14, 12, 13, 15}; // D5–D8
-const int resetPin = 16;                 // D0
-
-int activeBuzzer = -1;
-bool adminMode = false;
-unsigned long resetPressStart = 0;
-
-class Mp3Notify
-{
-public:
-  static void PrintlnSourceAction(DfMp3_PlaySources source, const char *action)
-  {
-    if (source & DfMp3_PlaySources_Sd)
-    {
-      Serial.print("SD Card, ");
-    }
-    if (source & DfMp3_PlaySources_Usb)
-    {
-      Serial.print("USB Disk, ");
-    }
-    if (source & DfMp3_PlaySources_Flash)
-    {
-      Serial.print("Flash, ");
-    }
-    Serial.println(action);
-  }
-  static void OnError([[maybe_unused]] DfMp3 &mp3, uint16_t errorCode)
-  {
-    Serial.println();
-    Serial.print("Com Error ");
-    Serial.println(errorCode);
-  }
-  static void OnPlayFinished([[maybe_unused]] DfMp3 &mp3, [[maybe_unused]] DfMp3_PlaySources source, uint16_t track)
-  {
-    Serial.print("Play finished for #");
-    Serial.println(track);
-
-    track += 1;
-    if (track > 3)
-    {
-      track = 1;
-    }
-    dfmp3.playMp3FolderTrack(track);
-  }
-  static void OnPlaySourceOnline([[maybe_unused]] DfMp3 &mp3, DfMp3_PlaySources source)
-  {
-    PrintlnSourceAction(source, "online");
-  }
-  static void OnPlaySourceInserted([[maybe_unused]] DfMp3 &mp3, DfMp3_PlaySources source)
-  {
-    PrintlnSourceAction(source, "inserted");
-  }
-  static void OnPlaySourceRemoved([[maybe_unused]] DfMp3 &mp3, DfMp3_PlaySources source)
-  {
-    PrintlnSourceAction(source, "removed");
-  }
-};
-
-void setup()
-{
-  Serial.begin(9600);
-  Serial.println("Booting...");
-
-  mp3Serial.begin(9600);
-  Serial.println("After mp3Serial begin");
-
-  dfmp3.begin();
-  dfmp3.setComRetries(1); // reduce blocking if no response
-  Serial.println("After dfmp3 begin");
-
-  delay(200); // let DFPlayer settle
-
-  dfmp3.reset();
-  // many DFPlayer clones need >1s after reset before responding reliably
-  delay(1200);
-  Serial.println("After dfmp3 reset");
-
-  for (int i = 0; i < 4; i++)
-  {
-    pinMode(buzzerPins[i], INPUT_PULLUP);
-    pinMode(ledPins[i], OUTPUT);
-    digitalWrite(ledPins[i], LOW);
-  }
-  pinMode(resetPin, INPUT_PULLUP);
-
-  // Warn about potential pin conflicts with DFPlayer serial (D4/D1)
-  for (int i = 0; i < 4; i++)
-  {
-    if (buzzerPins[i] == D4 || buzzerPins[i] == D1)
-    {
-      Serial.print("WARNING: buzzer pin conflicts with DF serial: index ");
-      Serial.println(i);
-    }
-  }
-
-  uint16_t version = dfmp3.getSoftwareVersion();
-  Serial.print("version ");
-  Serial.println(version);
-
-  uint16_t volume = dfmp3.getVolume();
-  Serial.print("volume ");
-  Serial.println(volume);
-  dfmp3.setVolume(24);
-
-  uint16_t count = dfmp3.getTotalTrackCount(DfMp3_PlaySource_Sd);
-  Serial.print("files ");
-  Serial.println(count);
-
-  Serial.println("starting...");
-
-  dfmp3.playMp3FolderTrack(1);
-}
-
-void loop()
-{
-  // Process DFPlayer callbacks
-  dfmp3.loop();
-
-  if (digitalRead(resetPin) == LOW && resetPressStart == 0)
-  {
-    resetPressStart = millis();
-  }
-
-  if (digitalRead(resetPin) == LOW && !adminMode && millis() - resetPressStart > 3000)
-  {
-    adminMode = true;
-    for (int i = 0; i < 4; i++)
-    {
-      digitalWrite(ledPins[i], HIGH);
-    }
-  }
-
-  if (digitalRead(resetPin) == HIGH && resetPressStart != 0)
-  {
-    if (adminMode)
-    {
-      adminMode = false;
-      for (int i = 0; i < 4; i++)
-      {
-        digitalWrite(ledPins[i], LOW);
-      }
-      activeBuzzer = -1;
-    }
-    else if (activeBuzzer != -1)
-    {
-      digitalWrite(ledPins[activeBuzzer], LOW);
-      activeBuzzer = -1;
-    }
-    resetPressStart = 0;
-    delay(300);
-  }
-
-  if (activeBuzzer == -1 && !adminMode)
-  {
-    for (int i = 0; i < 4; i++)
-    {
-      if (digitalRead(buzzerPins[i]) == LOW)
-      {
-        activeBuzzer = i;
-        for (int j = 0; j < 4; j++)
-        {
-          digitalWrite(ledPins[j], j == i ? HIGH : LOW);
-        }
-        break;
-      }
-    }
-  }
-}