diff --git a/sdk b/sdk
index c48f67a..c234f76 160000
--- a/sdk
+++ b/sdk
@@ -1 +1 @@
-Subproject commit c48f67a4d36d4ab2ebe30bff8c00a57f7cf5b47d
+Subproject commit c234f76635e86bc5c9289d8a3b6e8f5d5395859a
diff --git a/usrc/project_configs.h b/usrc/project_configs.h
index 6085450..954faed 100644
--- a/usrc/project_configs.h
+++ b/usrc/project_configs.h
@@ -1,5 +1,5 @@
 #pragma once
-#define PC_VERSION           501
+#define PC_VERSION           502
 #define PC_MANUFACTURER      "http://www.iflytop.com/"
 #define PC_PROJECT_NAME      "a8000_subboard"
 #define PC_IFLYTOP_ENABLE_OS 1