diff --git a/platformio.ini b/platformio.ini
index 55ed475..5ed2082 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -12,5 +12,6 @@
 platform = espressif32
 board = wt32-eth01
 framework = arduino
-lib_deps = siwats/ESPMegaProR3@^2.0.4
-monitor_speed = 115200
\ No newline at end of file
+lib_deps = siwats/ESPMegaProR3@^2.0.7
+monitor_speed = 115200
+;build_flags = -DCORE_DEBUG_LEVEL=5
\ No newline at end of file
diff --git a/src/cud_display.cpp b/src/cud_display.cpp
index a0b862f..9dffd1a 100644
--- a/src/cud_display.cpp
+++ b/src/cud_display.cpp
@@ -15,9 +15,11 @@ void CUDDisplay::begin(std::function<rtctime_t()> getTime, DigitalInputCard *inp
     auto bindedHandlePWMChange = std::bind(&CUDDisplay::handlePWMChange, this, std::placeholders::_1, std::placeholders::_2);
     auto bindedHandleACChange = std::bind(&CUDDisplay::handleACChange, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3);
     auto bindedHandleTouch = std::bind(&CUDDisplay::handleTouch, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3);
+    auto bindedHandlePayload = std::bind(&CUDDisplay::handlePayload, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3);
     this->outputCallbackHandle = this->outputCard->registerChangeCallback(bindedHandlePWMChange);
     this->climateCallbackHandle = this->climateCard->registerChangeCallback(bindedHandleACChange);
     this->registerTouchCallback(bindedHandleTouch);
+    this->registerPayloadCallback(bindedHandlePayload);
     this->reset();
     delay(1000);
     this->jumpToPage(1);
@@ -91,7 +93,7 @@ void CUDDisplay::handleTouch(uint8_t page, uint8_t component, uint8_t event)
         if (!ac_control_enabled) break;
         if (event != TOUCH_TYPE_RELEASE)
             break;
-        this->climateCard->setFanSpeed(1);
+        this->climateCard->setFanSpeed(3);
         break;
     case COMPONENT_AC_FAN_MODE_MEDIUM_BUTTON:
         if (!ac_control_enabled) break;
@@ -103,7 +105,7 @@ void CUDDisplay::handleTouch(uint8_t page, uint8_t component, uint8_t event)
         if (!ac_control_enabled) break;
         if (event != TOUCH_TYPE_RELEASE)
             break;
-        this->climateCard->setFanSpeed(3);
+        this->climateCard->setFanSpeed(1);
         break;
     default:
         break;
@@ -165,7 +167,7 @@ bool CUDDisplay::calculateFanGroupState() {
     // Check if all fans are on
     bool fanOn = false;
     for (uint8_t i = 4; i < 7; i++) {
-        if (this->outputCard->getState(i) == 0) {
+        if (this->outputCard->getState(i)) {
             fanOn = true;
             break;
         }
@@ -243,13 +245,13 @@ void CUDDisplay::updateACState() {
     this->displayAdapter->print(fan_speed == 0 ? COMPONENT_AC_FAN_MODE_AUTO_PIC_ACTIVE : COMPONENT_AC_FAN_MODE_AUTO_PIC_INACTIVE);
     this->sendStopBytes();
     this->displayAdapter->print("fan_1_btn.pic=");
-    this->displayAdapter->print(fan_speed == 1 ? COMPONENT_AC_FAN_MODE_HIGH_PIC_ACTIVE : COMPONENT_AC_FAN_MODE_HIGH_PIC_INACTIVE);
+    this->displayAdapter->print(fan_speed == 3 ? COMPONENT_AC_FAN_MODE_HIGH_PIC_ACTIVE : COMPONENT_AC_FAN_MODE_HIGH_PIC_INACTIVE);
     this->sendStopBytes();
     this->displayAdapter->print("fan_2_btn.pic=");
     this->displayAdapter->print(fan_speed == 2 ? COMPONENT_AC_FAN_MODE_MEDIUM_PIC_ACTIVE : COMPONENT_AC_FAN_MODE_MEDIUM_PIC_INACTIVE);
     this->sendStopBytes();
     this->displayAdapter->print("fan_3_btn.pic=");
-    this->displayAdapter->print(fan_speed == 3 ? COMPONENT_AC_FAN_MODE_LOW_PIC_ACTIVE : COMPONENT_AC_FAN_MODE_LOW_PIC_INACTIVE);
+    this->displayAdapter->print(fan_speed == 1 ? COMPONENT_AC_FAN_MODE_LOW_PIC_ACTIVE : COMPONENT_AC_FAN_MODE_LOW_PIC_INACTIVE);
     this->sendStopBytes();
     this->displayAdapter->print("temp_txt.txt=\"");
     this->displayAdapter->print(temperature);
@@ -265,4 +267,9 @@ void CUDDisplay::setACControlEnabled(bool enabled) {
 }
 bool CUDDisplay::getACControlEnabled() {
     return ac_control_enabled;
+}
+
+void CUDDisplay::handlePayload(uint8_t payload_type, uint8_t *payload, uint8_t length)
+{
+    
 }
\ No newline at end of file
diff --git a/src/cud_display.hpp b/src/cud_display.hpp
index 8d0f094..6db71d7 100644
--- a/src/cud_display.hpp
+++ b/src/cud_display.hpp
@@ -47,14 +47,14 @@ Pin Mapping
 #define COMPONENT_AC_FAN_MODE_AUTO_PIC_ACTIVE 20
 #define COMPONENT_AC_FAN_MODE_AUTO_PIC_INACTIVE 19
 #define COMPONENT_AC_FAN_MODE_LOW_BUTTON 8
-#define COMPONENT_AC_FAN_MODE_LOW_PIC_ACTIVE 22
-#define COMPONENT_AC_FAN_MODE_LOW_PIC_INACTIVE 21
+#define COMPONENT_AC_FAN_MODE_LOW_PIC_ACTIVE 26
+#define COMPONENT_AC_FAN_MODE_LOW_PIC_INACTIVE 25
 #define COMPONENT_AC_FAN_MODE_MEDIUM_BUTTON 9
 #define COMPONENT_AC_FAN_MODE_MEDIUM_PIC_ACTIVE 24
 #define COMPONENT_AC_FAN_MODE_MEDIUM_PIC_INACTIVE 23
 #define COMPONENT_AC_FAN_MODE_HIGH_BUTTON 10
-#define COMPONENT_AC_FAN_MODE_HIGH_PIC_ACTIVE 26
-#define COMPONENT_AC_FAN_MODE_HIGH_PIC_INACTIVE 25
+#define COMPONENT_AC_FAN_MODE_HIGH_PIC_ACTIVE 22
+#define COMPONENT_AC_FAN_MODE_HIGH_PIC_INACTIVE 21
 
 #define COMPONENT_BACKGROUND_AC_LOCK 2
 #define COMPONENT_BACKGROUND_AC_UNLOCK 1
@@ -71,6 +71,7 @@ class CUDDisplay : public ESPMegaDisplay {
         void handleTouch(uint8_t page, uint8_t component, uint8_t event);
         void handlePWMChange(uint8_t pin, uint8_t value);
         void handleACChange(uint8_t mode, uint8_t fan_speed, uint8_t temperature);
+        void handlePayload(uint8_t payload_type, uint8_t* payload, uint8_t length);
         void sendClock();
         void setACControlEnabled(bool enabled);
         bool getACControlEnabled();
diff --git a/src/main.cpp b/src/main.cpp
index 38ab607..738ea80 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,8 +2,8 @@
 #include <cud_display.hpp>
 
 /***********************************************
-*            Begin Configuration               *
-************************************************/
+ *            Begin Configuration               *
+ ************************************************/
 
 // Display Configuration
 #define cudDisplayAdapter Serial2
@@ -11,7 +11,10 @@
 #define CUD_DISPLAY_TX_PIN 4
 #define CUD_DISPLAY_RX_PIN 17
 
-//Air Conditioner Configuration
+// Air Conditioner Configuration
+#define AIR_CONDITIONER_LOCK_FRAM_ADDRESS 4900
+#define AIR_CONDITIONER_LOCK_RELATIVE_TOPIC "ac_lock"
+#define AIR_CONDITIONER_LOCK_SET_RELATIVE_TOPIC "ac_lock/set"
 #define AIR_CONDITIONER_SENSOR_TYPE AC_SENSOR_TYPE_DHT22
 #define AIR_CONDITIONER_SENSOR_PIN 32
 #define AIR_CONDITIONER_IR_PIN 5
@@ -27,8 +30,7 @@ AirConditioner ac = {
     .mode_names = mode_names,
     .fan_speeds = 4,
     .fan_speed_names = fan_speed_names,
-    .getInfraredCode = &getInfraredCode
-};
+    .getInfraredCode = &getInfraredCode};
 
 /***********************************************
  *            End Configuration                *
@@ -37,42 +39,119 @@ AirConditioner ac = {
 ESPMegaPRO espmega = ESPMegaPRO();
 CUDDisplay cudDisplay = CUDDisplay(&cudDisplayAdapter);
 
-ClimateCard climateCard = ClimateCard(AIR_CONDITIONER_IR_PIN, ac, 
-                          AIR_CONDITIONER_SENSOR_TYPE, AIR_CONDITIONER_SENSOR_PIN,
-                          AIR_CONDITIONER_RMT_CHANNEL);
+ClimateCard climateCard = ClimateCard(AIR_CONDITIONER_IR_PIN, ac,
+                                      AIR_CONDITIONER_SENSOR_TYPE, AIR_CONDITIONER_SENSOR_PIN,
+                                      AIR_CONDITIONER_RMT_CHANNEL);
 
-void setup() {
+void handleMqttMessage(char *topic, char *payload)
+{
+  Serial.printf("MQTT Message: %s %s\n", topic, payload);
+  if (!strcmp(topic, AIR_CONDITIONER_LOCK_SET_RELATIVE_TOPIC))
+  {
+    if (!strcmp(payload, "lock"))
+    {
+      lockAC();
+      espmega.iot->publishRelative(AIR_CONDITIONER_LOCK_RELATIVE_TOPIC, "lock");
+    }
+    else if (!strcmp(payload, "unlock"))
+    {
+      unlockAC();
+      espmega.iot->publishRelative(AIR_CONDITIONER_LOCK_RELATIVE_TOPIC, "unlock");
+    }
+  }
+}
+
+void lockAC()
+{
+  espmega.fram.write8(AIR_CONDITIONER_LOCK_FRAM_ADDRESS, 0);
+  cudDisplay.setACControlEnabled(false);
+}
+
+void unlockAC()
+{
+  espmega.fram.write8(AIR_CONDITIONER_LOCK_FRAM_ADDRESS, 1);
+  cudDisplay.setACControlEnabled(true);
+}
+
+void sendStopBytes()
+{
+  Serial.write(0xFF);
+  Serial.write(0xFF);
+  Serial.write(0xFF);
+}
+
+void sendExtStopBytes()
+{
+  cudDisplayAdapter.write(0xFF);
+  cudDisplayAdapter.write(0xFF);
+  cudDisplayAdapter.write(0xFF);
+}
+
+void setup()
+{
+  Serial.begin(115200);
+  cudDisplayAdapter.begin(CUD_DISPLAY_BAUD_RATE, SERIAL_8N1, CUD_DISPLAY_RX_PIN, CUD_DISPLAY_TX_PIN);
+  sendExtStopBytes();
+  cudDisplayAdapter.print("rest");
+  sendExtStopBytes();
+  sendStopBytes();
+  Serial.print("rest");
+  sendStopBytes();
+  Serial.print("boot_state.txt=\"Core Initializing . . .\"");
+  sendStopBytes();
   espmega.begin();
+  Serial.print("boot_state.txt=\"IoT Initializing . . .\"");
+  sendStopBytes();
   espmega.enableIotModule();
   ETH.begin();
   espmega.iot->bindEthernetInterface(&ETH);
+  Serial.print("boot_state.txt=\"Network Initializing . . .\"");
+  sendStopBytes();
   espmega.iot->loadNetworkConfig();
   espmega.iot->connectNetwork();
+  Serial.print("boot_state.txt=\"MQTT Initializing . . .\"");
+  sendStopBytes();
   espmega.iot->loadMqttConfig();
   espmega.iot->connectToMqtt();
+  Serial.print("boot_state.txt=\"Display Initializing . . .\"");
   espmega.enableInternalDisplay(&Serial);
   espmega.enableWebServer(80);
   espmega.inputs.registerCallback(on_pin_change);
   espmega.outputs.setAutoSaveToFRAM(true);
-  espmega.installCard(3, &climateCard);
+  espmega.installCard(2, &climateCard);
   climateCard.bindFRAM(&espmega.fram, 5000);
   climateCard.loadStateFromFRAM();
   climateCard.setFRAMAutoSave(true);
   espmega.display->bindClimateCard(&climateCard);
-  espmega.iot->registerCard(3);
-  cudDisplayAdapter.begin(CUD_DISPLAY_BAUD_RATE, SERIAL_8N1, CUD_DISPLAY_RX_PIN, CUD_DISPLAY_TX_PIN);
+  espmega.iot->registerCard(0); // Register the Input Card
+  espmega.iot->registerCard(1); // Register the Output Card
+  espmega.iot->registerCard(2); // Register the Climate Card
   auto bindedGetTime = std::bind(&ESPMegaPRO::getTime, &espmega);
   cudDisplay.begin(bindedGetTime, &espmega.inputs, &espmega.outputs, &climateCard);
+  if (espmega.fram.read8(AIR_CONDITIONER_LOCK_FRAM_ADDRESS))
+  {
+    lockAC();
+  }
+  else
+  {
+    // AC is unlocked
+    unlockAC();
+  }
+  espmega.iot->subscribeRelative(AIR_CONDITIONER_LOCK_SET_RELATIVE_TOPIC);
+  espmega.iot->registerRelativeMqttCallback(&handleMqttMessage);
 }
 
-void loop() {
+void loop()
+{
   espmega.loop();
   cudDisplay.loop();
 }
 
-void on_pin_change(uint8_t pin, uint8_t value) {
+void on_pin_change(uint8_t pin, uint8_t value)
+{
   // For pin 0-6, when the pin value changes, toggle the corresponding PWM pin
-  if (pin < 7) {
+  if (pin < 7)
+  {
     bool new_value = !espmega.outputs.getState(pin);
     espmega.outputs.digitalWrite(pin, new_value);
   }
diff --git a/src/main.hpp b/src/main.hpp
index d3d02cc..22d46ab 100644
--- a/src/main.hpp
+++ b/src/main.hpp
@@ -3,6 +3,13 @@
 #include <cud_display.hpp>
 #include <ir_codes.hpp>
 
+void handleMqttMessage(char *topic, char *payload);
+void lockAC();
+void unlockAC();
+
+void sendStopBytes();
+void sendExtStopBytes();
+
 void setup();
 void loop();