diff --git a/app/src/main/cpp/SensorsProtocol.cpp b/app/src/main/cpp/SensorsProtocol.cpp
index dd896aa2..178c48b4 100644
--- a/app/src/main/cpp/SensorsProtocol.cpp
+++ b/app/src/main/cpp/SensorsProtocol.cpp
@@ -94,6 +94,10 @@ static int64_t get_msec()
 
 void DebugLog(int commid, char flag, const char* format, ...)
 {
+#ifndef NDEBUG
+    ALOGW("FMT: %s", format);
+    // std::this_thread::sleep_for(std::chrono::milliseconds(100));
+#endif
     va_list argptr;
     va_start(argptr, format);
 
@@ -140,6 +144,10 @@ void DebugLog(int commid, char flag, const char* format, ...)
 #endif
 
     delete[] szbuf;
+
+#ifndef NDEBUG
+    ALOGW("FMT: %s end", format);
+#endif
 }
 
 int SaveLogTofile(int commid, const char *szbuf)