feat: implement initial ESP32 school bell system with web UI, DFPlayer control, RTC, LittleFS, and OTA.

src/main.cpp

@@ -1,15 +1,16 @@
 // src/main.cpp
 // Bel Sekolah ESP32 - final version
 // Pins:
-// RESET_PIN        = 5 (hold >15s -> reset admin credentials)
-// STATUS_LED_PIN   = 6
-// RELAY_PIN        = 7 (active LOW)
-// DFPLAYER_RX_PIN  = 15
-// DFPLAYER_TX_PIN  = 16
-// BUSY_PIN         = 17 (LOW = busy)
-//esp32 sda  21
-//esp32 scl  22
-//MCU adalah Wemos ESP32 mini
+// TEST_BUTTON      = 18 (click -> toggle relay, long press -> play test MP3)
+// RESET_BUTTON     = 0  (long press >15s -> reset admin credentials)
+// STATUS_LED_PIN   = 26
+// RELAY_PIN        = 19 (active LOW)
+// DFPLAYER_RX_PIN  = 16
+// DFPLAYER_TX_PIN  = 17
+// BUSY_PIN         = 5 (LOW = busy)
+// esp32 sda  21
+// esp32 scl  22
+// MCU adalah Wemos ESP32 mini
 
 #include <Arduino.h>
 #include <WiFi.h>
@@ -35,7 +36,8 @@
 #define DFPLAYER_TX_PIN 17 //2 df
 #define RELAY_PIN 19
 #define BUSY_PIN 5 //must high at boot (strapping pin)
-#define RESET_PIN 18
+#define TEST_BUTTON 18
+#define RESET_BUTTON 0
 #define BUZZER_PIN 23
 
 #define RESET_HOLD_MS 15000UL
@@ -74,12 +76,19 @@ bool buzzerState = false;
 bool adminResetBlinking = false;
 unsigned long adminResetEndTime = 0;
 
-// Button flags
-volatile bool btnClickPending = false;
-volatile bool btnLongPressPending = false;
+// Button flags for TEST_BUTTON
+volatile bool testBtnClickPending = false;
+volatile bool testBtnLongPressPending = false;
 
-// OneButton instance for RESET_PIN
-OneButton button(RESET_PIN, true);
+// Button flags for RESET_BUTTON
+volatile bool resetBtnLongPressPending = false;
+
+// Manual relay toggle state (separate from automatic relay control)
+bool manualRelayOn = false;
+
+// OneButton instances
+OneButton testButton(TEST_BUTTON, true);
+OneButton resetButton(RESET_BUTTON, true);
 
 //////////////////////////////////////////////////////////////////////////
 // WiFi Channel Selection
@@ -659,7 +668,8 @@ void setup(){
   pinMode(RELAY_PIN, OUTPUT);
   digitalWrite(RELAY_PIN, HIGH); // relay active LOW, so HIGH = off
   pinMode(BUSY_PIN, INPUT_PULLUP); // busy pin input (LOW when busy)
-  pinMode(RESET_PIN, INPUT_PULLUP);
+  pinMode(TEST_BUTTON, INPUT_PULLUP);
+  pinMode(RESET_BUTTON, INPUT_PULLUP);
   pinMode(BUZZER_PIN, OUTPUT);
   digitalWrite(BUZZER_PIN, LOW);
 
@@ -732,16 +742,19 @@ void setup(){
   ArduinoOTA.begin();
 
 
-  // Setup OneButton callbacks
-  button.setPressMs(15000); // Set long press to 15 seconds
-  button.attachClick([]() {
-    // Just set flag, don't do heavy work here
-    btnClickPending = true;
+  // Setup TEST_BUTTON callbacks (click=toggle relay, long press=play test MP3)
+  testButton.setPressMs(2000); // 2 seconds for test MP3 play
+  testButton.attachClick([]() {
+    testBtnClickPending = true;
+  });
+  testButton.attachLongPressStart([]() {
+    testBtnLongPressPending = true;
   });
 
-  button.attachLongPressStart([]() {
-    // Just set flag
-    btnLongPressPending = true;
+  // Setup RESET_BUTTON callbacks (long press=reset admin credentials)
+  resetButton.setPressMs(15000); // 15 seconds for admin reset
+  resetButton.attachLongPressStart([]() {
+    resetBtnLongPressPending = true;
   });
 
 
@@ -754,21 +767,45 @@ void setup(){
 void loop(){
   ArduinoOTA.handle();
 
-  ws.cleanupClients();
+  // Handle OneButton instances
+  testButton.tick();
+  resetButton.tick();
 
-  // Handle OneButton
-  button.tick();
-
-  // Process button events outside of callback
-  if (btnClickPending) {
-    btnClickPending = false;
-    Serial.println("[BUTTON] Click detected: playing track 1000");
-    playTrack(1000, "Manual Click");
+  // Process TEST_BUTTON click: toggle relay manually
+  if (testBtnClickPending) {
+    testBtnClickPending = false;
+    manualRelayOn = !manualRelayOn;
+    if (manualRelayOn) {
+      digitalWrite(RELAY_PIN, LOW);  // relay active LOW
+      relayOn = true;
+      Serial.println("[BUTTON] Manual relay ON");
+      DynamicJsonDocument d(256);
+      d["type"] = "log";
+      d["msg"] = "🔊 Relay dinyalakan manual";
+      sendJsonWs(d);
+    } else {
+      digitalWrite(RELAY_PIN, HIGH); // relay off
+      relayOn = false;
+      Serial.println("[BUTTON] Manual relay OFF");
+      DynamicJsonDocument d(256);
+      d["type"] = "log";
+      d["msg"] = "🔇 Relay dimatikan manual";
+      sendJsonWs(d);
+    }
+    broadcastStatus();
   }
 
-  if (btnLongPressPending) {
-    btnLongPressPending = false;
-    Serial.println("[BUTTON] Long press detected: resetting admin credentials");
+  // Process TEST_BUTTON long press: play test MP3
+  if (testBtnLongPressPending) {
+    testBtnLongPressPending = false;
+    Serial.println("[BUTTON] Long press detected: playing track 1000");
+    playTrack(1000, "Manual Test");
+  }
+
+  // Process RESET_BUTTON long press: reset admin credentials
+  if (resetBtnLongPressPending) {
+    resetBtnLongPressPending = false;
+    Serial.println("[BUTTON] Reset button long press: resetting admin credentials");
     resetAdminToDefault();
   }
 
@@ -842,8 +879,8 @@ void loop(){
     }
   }
 
-  // release relay if conditions met
-  if (!busy && relayOn && millis() > relayHoldUntil) {
+  // release relay if conditions met (but not if manual mode is active)
+  if (!busy && relayOn && millis() > relayHoldUntil && !manualRelayOn) {
     digitalWrite(RELAY_PIN, HIGH); // OFF
     relayOn = false;
   }