diff --git a/.vscode/settings.json b/.vscode/settings.json
index 6697d83..47a4a4d 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -62,6 +62,7 @@
         "streambuf": "cpp",
         "typeinfo": "cpp",
         "cstdarg": "cpp",
-        "cinttypes": "cpp"
+        "cinttypes": "cpp",
+        "modbus_basic.h": "c"
     }
 }
\ No newline at end of file
diff --git a/sdk b/sdk
index 2f53851..49fdc5f 160000
--- a/sdk
+++ b/sdk
@@ -1 +1 @@
-Subproject commit 2f53851e65c19d2f4c01efd6804408d48c986749
+Subproject commit 49fdc5fc4c5176eb911e4e1eb1b1d70713f4767d