diff --git a/src/debug.h b/src/debug.h
index 10c2055..89b1ced 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -30,12 +30,13 @@
 #ifndef _SDK_DEBUG_H_
 #define _SDK_DEBUG_H_
 
-#define DEBUG_LEVEL     1 // Set this to adjust what you'd like to see in the debug traces
+#define DEBUG_LEVEL     4 // Set this to adjust what you'd like to see in the debug traces
 
 #define MSG_ERROR       1 // Errors
 #define MSG_TRANSFER    2 // RX/TX specific statements
 #define MSG_INFO        3 // Information which is generally useful to any developer
 #define MSG_EXTRA       4 // If nothing in your world makes sense
+#define MSG_FLOW        5 // High-level flow messages
 
 #define __SHOW_FILENAMES__    true
 #define __SHOW_COLOR__        true
@@ -91,6 +92,7 @@ extern "C" {
  #else
   #define DEBUG_ERROR(fmt, args...)
  #endif
+ 
  #if DEBUG_LEVEL >= MSG_INFO
   #if defined(__ANDROID__)
     #define DEBUG_INFO(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, "ZT_INFO : %14s:%4d:%20s: " fmt "\n", __FILENAME__, __LINE__, __FUNCTION__, ##args))
@@ -109,6 +111,7 @@ extern "C" {
   #define DEBUG_ATTN(fmt, args...)
   #define DEBUG_STACK(fmt, args...)
  #endif
+ 
  #if DEBUG_LEVEL >= MSG_TRANSFER
   #if defined(__ANDROID__)
     #define DEBUG_TRANS(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, "ZT_TRANS : %14s:%4d:%25s: " fmt "\n", __FILENAME__, __LINE__, __FUNCTION__, ##args))
@@ -118,6 +121,7 @@ extern "C" {
  #else
   #define DEBUG_TRANS(fmt, args...)
  #endif
+ 
  #if DEBUG_LEVEL >= MSG_EXTRA
    #if defined(__ANDROID__)
     #define DEBUG_EXTRA(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, "ZT_EXTRA : %14s:%4d:%25s: " fmt "\n", __FILENAME__, __LINE__, __FUNCTION__, ##args))
@@ -127,6 +131,16 @@ extern "C" {
  #else
   #define DEBUG_EXTRA(fmt, args...)
  #endif
+
+#if DEBUG_LEVEL >= MSG_FLOW
+   #if defined(__ANDROID__)
+    #define DEBUG_FLOW(fmt, args...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, "ZT_FLOW : %14s:%4d:%25s: " fmt "\n", __FILENAME__, __LINE__, __FUNCTION__, ##args))
+  #else
+    #define DEBUG_FLOW(fmt, args...) fprintf(stderr, "ZT_FLOW: %14s:%4d:%25s: " fmt "\n", __FILENAME__, __LINE__, __FUNCTION__, ##args)
+  #endif
+ #else
+  #define DEBUG_FLOW(fmt, args...)
+ #endif
 //#endif
 
 #ifdef __cplusplus