diff --git a/README.md b/README.md
index ff44dae..3a5829d 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,9 @@ V1.0
 
 V2.0
     1. 手柄一直开启广播
-    
+
+v2.1
+    1.修改手柄回流和预充满管路按键    
 
 ```
 
diff --git a/app/src/acid_dispenser_ble_slave_main.c b/app/src/acid_dispenser_ble_slave_main.c
index dc9adbb..508c9d0 100644
--- a/app/src/acid_dispenser_ble_slave_main.c
+++ b/app/src/acid_dispenser_ble_slave_main.c
@@ -242,9 +242,9 @@ void process_online_standy(app_event_t* event, uint16_t event_size) {  //
       }
     } else if (keyid == keyid_reflux) {
       if (eventType == kappevent_key_pressed) {
-        send_report_key_event(hand_acid_remoter_kevent_reflux);
-      } else if (eventType == kappevent_key_pressed_double) {
         send_report_key_event(hand_acid_remoter_kevent_preFilling);
+      } else if (eventType == kappevent_key_pressed_double) {
+        send_report_key_event(hand_acid_remoter_kevent_reflux);
       }
     }
     return;
diff --git a/app/src/aproject_config/config.h b/app/src/aproject_config/config.h
index 6f5a8f2..11729c7 100644
--- a/app/src/aproject_config/config.h
+++ b/app/src/aproject_config/config.h
@@ -3,7 +3,7 @@
 #define CATEGORY          "AciDisp"  //
 #define MANUFACTURER_NAME "iflytop"
 
-#define FIRMWARE_VERSION   (2)
+#define FIRMWARE_VERSION   (3)
 #define BLESTACK_VERSION   (1)
 #define BOOTLOADER_VERSION (1)
 #define HARDWARE_VERSION   (1)