diff --git a/app/include/driver/uart.h b/app/include/driver/uart.h
index c2c8001d..3dd3df6b 100644
--- a/app/include/driver/uart.h
+++ b/app/include/driver/uart.h
@@ -33,6 +33,9 @@ typedef enum {
 } UartExistParity;
 
 typedef enum {
+    BIT_RATE_9600     = 1200,
+    BIT_RATE_9600     = 2400,
+    BIT_RATE_4800     = 4800,  
     BIT_RATE_9600     = 9600,
     BIT_RATE_19200   = 19200,
     BIT_RATE_38400   = 38400,