diff --git a/ArduBlockTool/tool/ardublock_letsgoing_21.jar b/ArduBlockTool/tool/ardublock_letsgoing_21.jar new file mode 100644 index 0000000000000000000000000000000000000000..551a29c77cdc28d1a9d6dee8d5a199eae307f037 Binary files /dev/null and b/ArduBlockTool/tool/ardublock_letsgoing_21.jar differ