use latest esp32 core for platformIO

fix unused variable

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "terminal.integrated.env.windows": {
+        "PATH": "C:\\Users\\user\\.platformio\\penv\\Scripts;C:\\Users\\user\\.platformio\\penv;C:\\ImageMagick\\ImageMagick-7.0.8-Q16;C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\Program Files (x86)\\Common Files\\Oracle\\Java\\javapath;C:\\Program Files (x86)\\Intel\\Intel(R) Management Engine Components\\iCLS\\;C:\\Program Files\\Intel\\Intel(R) Management Engine Components\\iCLS\\;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files (x86)\\Intel\\Intel(R) Management Engine Components\\DAL;C:\\Program Files\\Intel\\Intel(R) Management Engine Components\\DAL;C:\\Program Files (x86)\\Intel\\Intel(R) Management Engine Components\\IPT;C:\\Program Files\\Intel\\Intel(R) Management Engine Components\\IPT;C:\\Program Files\\Intel\\WiFi\\bin\\;C:\\Program Files\\Common Files\\Intel\\WirelessCommon\\;C:\\Program Files\\PuTTY\\;C:\\Program Files\\Git\\cmd;C:\\Program Files\\nodejs\\;C:\\Program Files\\TortoiseGit\\bin;C:\\Program Files\\dotnet\\;C:\\Program Files\\Microsoft SQL Server\\Client SDK\\ODBC\\110\\Tools\\Binn\\;C:\\Program Files (x86)\\Microsoft SQL Server\\120\\Tools\\Binn\\;C:\\Program Files\\Microsoft SQL Server\\120\\Tools\\Binn\\;C:\\Program Files\\Microsoft SQL Server\\120\\DTS\\Binn\\;C:\\Program Files (x86)\\Windows Kits\\8.1\\Windows Performance Toolkit\\;C:\\Program Files\\LLVM\\bin;C:\\Program Files\\Microsoft VS Code\\bin;C:\\Users\\user\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Program Files\\Intel\\WiFi\\bin\\;C:\\Program Files\\Common Files\\Intel\\WirelessCommon\\;C:\\Users\\user\\AppData\\Local\\GitHubDesktop\\bin;C:\\Eclipse\\GNUTools\\2.6-201507152002\\bin;C:\\Users\\user\\AppData\\Roaming\\npm;C:\\Users\\user\\AppData\\Local\\atom\\bin;C:\\Unxtools;;%USERPROFILE%\\AppData\\Local\\Microsoft\\WindowsApps;C:\\ImageMagick\\ImageMagick-7.0.8-Q16;C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\Program Files (x86)\\Common Files\\Oracle\\Java\\javapath;C:\\Program Files (x86)\\Intel\\Intel(R) Management Engine Components\\iCLS\\;C:\\Program Files\\Intel\\Intel(R) Management Engine Components\\iCLS\\;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files (x86)\\Intel\\Intel(R) Management Engine Components\\DAL;C:\\Program Files\\Intel\\Intel(R) Management Engine Components\\DAL;C:\\Program Files (x86)\\Intel\\Intel(R) Management Engine Components\\IPT;C:\\Program Files\\Intel\\Intel(R) Management Engine Components\\IPT;C:\\Program Files\\Intel\\WiFi\\bin\\;C:\\Program Files\\Common Files\\Intel\\WirelessCommon\\;C:\\Program Files\\PuTTY\\;C:\\Program Files\\Git\\cmd;C:\\Program Files\\nodejs\\;C:\\Program Files\\TortoiseGit\\bin;C:\\Program Files\\dotnet\\;C:\\Program Files\\Microsoft SQL Server\\Client SDK\\ODBC\\110\\Tools\\Binn\\;C:\\Program Files (x86)\\Microsoft SQL Server\\120\\Tools\\Binn\\;C:\\Program Files\\Microsoft SQL Server\\120\\Tools\\Binn\\;C:\\Program Files\\Microsoft SQL Server\\120\\DTS\\Binn\\;C:\\Program Files (x86)\\Windows Kits\\8.1\\Windows Performance Toolkit\\;C:\\Program Files\\LLVM\\bin;C:\\Program Files\\Microsoft VS Code\\bin;C:\\Users\\user\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Program Files\\Intel\\WiFi\\bin\\;C:\\Program Files\\Common Files\\Intel\\WirelessCommon\\;C:\\Users\\user\\AppData\\Local\\GitHubDesktop\\bin;C:\\Eclipse\\GNUTools\\2.6-201507152002\\bin;C:\\Users\\user\\AppData\\Roaming\\npm;C:\\Users\\user\\AppData\\Local\\atom\\bin;C:\\Unxtools;;%USERPROFILE%\\AppData\\Local\\Microsoft\\WindowsApps",
+        "PLATFORMIO_CALLER": "vscode"
+    }
+}

esp3d/syncwebserver.cpp

@@ -603,7 +603,6 @@ void SPIFFSFileupload()
 {
 	static FS_FILE fsUploadFile = (FS_FILE)0;
     static String filename;
-    static uint8_t errorcode = 0;
     //get authentication status
     level_authenticate_type auth_level= web_interface->is_authenticated();
     //Guest cannot upload

platformio.ini

@@ -16,7 +16,7 @@ libdeps_dir = .piolibdeps
 data_dir = esp3d/data
 
 [env:esp32dev]
-platform = espressif32
+platform = https://github.com/platformio/platform-espressif32.git
 ;theboard
 board = esp32dev
 framework = arduino