diff --git a/.gitignore b/.gitignore
index a4a37ad..8b617f4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,4 +7,5 @@
 .vscode/
 .vscode/settings.json
 firmware/
-release/
\ No newline at end of file
+release/
+.vscode/extensions.json
diff --git a/.vscode/settings.json b/.vscode/settings.json
deleted file mode 100644
index ee32b37..0000000
--- a/.vscode/settings.json
+++ /dev/null
@@ -1,78 +0,0 @@
-{
-  "C_Cpp.errorSquiggles": "enabled",
-  "files.associations": {
-    "*.cps": "javascript",
-    "string": "cpp",
-    "optional": "cpp",
-    "istream": "cpp",
-    "ostream": "cpp",
-    "system_error": "cpp",
-    "array": "cpp",
-    "functional": "cpp",
-    "tuple": "cpp",
-    "type_traits": "cpp",
-    "utility": "cpp",
-    "*.d": "cpp",
-    "*.html": "cpp",
-    "*.tcc": "cpp",
-    "regex": "cpp"
-  },
-  "C_Cpp_Runner.msvcBatchPath": "",
-  "C_Cpp_Runner.cCompilerPath": "gcc",
-  "C_Cpp_Runner.cppCompilerPath": "g++",
-  "C_Cpp_Runner.debuggerPath": "gdb",
-  "C_Cpp_Runner.cStandard": "",
-  "C_Cpp_Runner.cppStandard": "",
-  "C_Cpp_Runner.useMsvc": false,
-  "C_Cpp_Runner.warnings": [
-    "-Wall",
-    "-Wextra",
-    "-Wpedantic",
-    "-Wshadow",
-    "-Wformat=2",
-    "-Wcast-align",
-    "-Wconversion",
-    "-Wsign-conversion",
-    "-Wnull-dereference"
-  ],
-  "C_Cpp_Runner.msvcWarnings": [
-    "/W4",
-    "/permissive-",
-    "/w14242",
-    "/w14287",
-    "/w14296",
-    "/w14311",
-    "/w14826",
-    "/w44062",
-    "/w44242",
-    "/w14905",
-    "/w14906",
-    "/w14263",
-    "/w44265",
-    "/w14928"
-  ],
-  "C_Cpp_Runner.enableWarnings": true,
-  "C_Cpp_Runner.warningsAsError": false,
-  "C_Cpp_Runner.compilerArgs": [],
-  "C_Cpp_Runner.linkerArgs": [],
-  "C_Cpp_Runner.includePaths": [],
-  "C_Cpp_Runner.includeSearch": [
-    "*",
-    "**/*"
-  ],
-  "C_Cpp_Runner.excludeSearch": [
-    "**/build",
-    "**/build/**",
-    "**/.*",
-    "**/.*/**",
-    "**/.vscode",
-    "**/.vscode/**"
-  ],
-  "C_Cpp_Runner.useAddressSanitizer": false,
-  "C_Cpp_Runner.useUndefinedSanitizer": false,
-  "C_Cpp_Runner.useLeakSanitizer": false,
-  "C_Cpp_Runner.showCompilationTime": false,
-  "C_Cpp_Runner.useLinkTimeOptimization": false,
-  "C_Cpp_Runner.msvcSecureNoWarnings": false,
-  "cmake.sourceDirectory": "D:/Git/iot-firmware/.pio/libdeps/full/Adafruit BusIO"
-}
\ No newline at end of file
diff --git a/Jenkinsfile b/Jenkinsfile
index dcf9353..af7a9cf 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -4,7 +4,7 @@ pipeline {
     stages {
         stage('Build') {
             steps {
-                git branch: 'main', url: 'https://git.siwatsystem.com/ise-senior-iot/iot-firmware.git'
+                git branch: 'lcd_upload', url: 'https://git.siwatsystem.com/ise-senior-iot/iot-firmware.git'
                 sh 'export PLATFORMIO_PATH=/root/.platformio/penv/bin/platformio'
                 sh '/usr/bin/python3 gen_release.py'
                 stash includes: 'release/**/*', name: 'release_binaries'
diff --git a/src/espmega_iot_core.cpp b/src/espmega_iot_core.cpp
index 845de70..1135a0f 100644
--- a/src/espmega_iot_core.cpp
+++ b/src/espmega_iot_core.cpp
@@ -547,6 +547,24 @@ void ota_begin()
           }
         }
       });
+  otaserver.on("/lcd_update",HTTP_POST,[]() {
+    otaserver.sendHeader("Connection","close");
+  },[](){
+    for(int i=0;i<otaserver.headers();i++) {
+        // Print all headers
+        Serial.printf("HEADER[%s]:[%s]\n", otaserver.headerName(i).c_str(), otaserver.header(i).c_str());
+    }
+    HTTPUpload &upload = otaserver.upload();
+    size_t file_size = 0;
+    if(upload.status == UPLOAD_FILE_START) {
+      Serial.println(file_size);
+      lcd_upload_start(file_size);
+    } else if (upload.status == UPLOAD_FILE_WRITE) {
+      lcd_upload_write(upload.buf, upload.currentSize);
+    } else if (upload.status == UPLOAD_FILE_END) {
+      Serial.println("Upload END.");
+    }
+  });
   otaserver.begin();
 }
 #endif
diff --git a/src/espmega_iot_lcd.cpp b/src/espmega_iot_lcd.cpp
index 1f03338..0628433 100644
--- a/src/espmega_iot_lcd.cpp
+++ b/src/espmega_iot_lcd.cpp
@@ -1,9 +1,11 @@
 #include <user_code.hpp>
 #include <espmega_iot_lcd.hpp>
 
+int lcd_byte_counter = 0;
+
 /**
  * @brief Sends stop bit to LCD.
- * 
+ *
  * This function sends a stop bit to the LCD. It is only enabled if the ENABLE_INTERNAL_LCD macro is defined.
  */
 void lcd_send_stop_bit()
@@ -17,7 +19,7 @@ void lcd_send_stop_bit()
 
 /**
  * Sends a command to the LCD display.
- * 
+ *
  * @param command The command to send to the LCD display.
  */
 void lcd_send_command(String command)
@@ -31,9 +33,9 @@ void lcd_send_command(String command)
 
 /**
  * @brief Resets the LCD display.
- * 
+ *
  * If ENABLE_INTERNAL_LCD is defined, sends a reset command to the LCD display.
- * 
+ *
  */
 void lcd_reset()
 {
@@ -57,7 +59,7 @@ void lcd_init()
 
 /**
  * @brief Starts the upload process to the LCD.
- * 
+ *
  * @param size The size of the data to be uploaded.
  * @return true if the upload process started successfully, false otherwise.
  */
@@ -70,14 +72,16 @@ bool lcd_upload_start(size_t size)
     Serial.print("connect");
     lcd_send_stop_bit();
     delay(1000);
-    Serial.print("whmi-wri 1024,115200,res0");
+    Serial.print("whmi-wri ");
+    Serial.print(size);
+    Serial.print(",115200,res0");
     lcd_send_stop_bit();
-    lcd_wait_ack();
+    return lcd_wait_ack();
 }
 
 /**
  * Writes data to the LCD upload buffer.
- * 
+ *
  * @param data Pointer to the data to be written.
  * @param size Size of the data to be written.
  * @return True if the write was successful, false otherwise.
@@ -87,9 +91,15 @@ bool lcd_upload_write(uint8_t *data, size_t size)
     for (int i = 0; i < size; i++)
     {
         Serial.write(data[i]);
+        lcd_byte_counter++;
+        if (lcd_byte_counter == 4096)
+        {
+            lcd_wait_ack();
+            lcd_byte_counter = 0;
+        }
     }
+    return true;
 }
-
 /**
  * Waits for an acknowledgement signal from the LCD.
  * @return true if acknowledgement signal is received, false otherwise.
@@ -97,12 +107,15 @@ bool lcd_upload_write(uint8_t *data, size_t size)
 bool lcd_wait_ack()
 {
     bool data_ok = false;
-    for (int i; i < 50; i++)
+    for (int i = 0; i < 50; i++)
     {
-        if (Serial.read() == 0x05)
+        if (Serial.available())
         {
-            data_ok = true;
-            break;
+            if (Serial.read() == 0x05)
+            {
+                data_ok = true;
+                break;
+            }
         }
         delay(100);
     }
diff --git a/src/ota_html/ota-part3.html b/src/ota_html/ota-part3.html
index 4826dbf..4c7daee 100644
--- a/src/ota_html/ota-part3.html
+++ b/src/ota_html/ota-part3.html
@@ -23,11 +23,14 @@ R"=====(<button type="button" class="conf" onclick="window.location.href='config
     var form = $("#upload_form")[0];
     var data = new FormData(form);
     $.ajax({
-      url: "/update",
+      url: "/lcd_update",
       type: "POST",
       data: data,
       contentType: false,
       processData: false,
+      headers: {
+        "Content-Length": data.length
+      },
       xhr: function () {
         var xhr = new window.XMLHttpRequest();
         xhr.upload.addEventListener(