diff --git a/Classes/objc/BabyToy.h b/Classes/objc/BabyToy.h
index bf2c92c..5b696ed 100644
--- a/Classes/objc/BabyToy.h
+++ b/Classes/objc/BabyToy.h
@@ -31,4 +31,8 @@
 //根据UUIDString查找CBCharacteristic
 +(CBCharacteristic *)findCharacteristicFormServices:(NSMutableArray *)services
                                          UUIDString:(NSString *)UUIDString;
+//BCD转十进制
++(NSInteger)BCDToInt:(Byte)bcd;
+//十进制转bcd
++(Byte)intToBCD:(NSInteger)i;
 @end
diff --git a/Classes/objc/BabyToy.m b/Classes/objc/BabyToy.m
index 7a3ce0e..ea0b5d1 100644
--- a/Classes/objc/BabyToy.m
+++ b/Classes/objc/BabyToy.m
@@ -86,6 +86,28 @@ + (CBCharacteristic *)findCharacteristicFormServices:(NSMutableArray *)services
     return nil;
 }
 
+
+/***
+ 十进制转bcd
+ ****/
+
+
++(Byte)intToBCD:(NSInteger)i{
+    
+    return (((i / 10) << 4) + ((i % 10) & 0x0f));
+    
+}
+
+/***
+ BCD转十进制
+ ****/
+
++(NSInteger)BCDToInt:(Byte)bcd{
+    
+    return (0xff & (bcd >> 4)) * 10 + (0xf & bcd);
+    
+}
+
 @end