diff --git a/bean/hand_acid_remoter_key_event.h b/bean/hand_acid_remoter_key_event.h
index 75170e5..dd11d42 100644
--- a/bean/hand_acid_remoter_key_event.h
+++ b/bean/hand_acid_remoter_key_event.h
@@ -5,3 +5,18 @@ typedef enum {
   hand_acid_remoter_kevent_reflux           = 2,  //
   hand_acid_remoter_kevent_preFilling       = 3,  //
 } hand_acid_remoter_key_event_t;
+
+static inline const char* hand_acid_remoter_key_event_2_str(int e) {
+  switch (e) {
+    case hand_acid_remoter_kevent_add_liquid:
+      return "hand_acid_remoter_kevent_add_liquid";
+    case hand_acid_remoter_kevent_change_next_mode:
+      return "hand_acid_remoter_kevent_change_next_mode";
+    case hand_acid_remoter_kevent_reflux:
+      return "hand_acid_remoter_kevent_reflux";
+    case hand_acid_remoter_kevent_preFilling:
+      return "hand_acid_remoter_kevent_preFilling";
+    default:
+      return "Unknown hand_acid_remoter_key_event_t";
+  }
+}
\ No newline at end of file
diff --git a/ble_through/ble_proto.h b/ble_through/ble_proto.h
index e954042..30bbedd 100644
--- a/ble_through/ble_proto.h
+++ b/ble_through/ble_proto.h
@@ -22,6 +22,19 @@ typedef enum {
   kzble_slave  = 3,
 } zble_proto_role_t;
 
+static inline const char* zble_proto_role_2_str(int role) {
+  switch (role) {
+    case kzble_upper:
+      return "upper";
+    case kzble_master:
+      return "master";
+    case kzble_slave:
+      return "slave";
+    default:
+      return "unknown";
+  }
+}
+
 /***********************************************************************************************************************
  *                                                        ENUM                                                         *
  ***********************************************************************************************************************/