diff --git a/Core/Src/sts_weight_scale.c b/Core/Src/sts_weight_scale.c
index a23d155..d5b768a 100644
--- a/Core/Src/sts_weight_scale.c
+++ b/Core/Src/sts_weight_scale.c
@@ -70,7 +70,10 @@ uint8_t Flag_Error = 0;
 //如果测试出来的重量偏小时，减小改数值。
 //该值可以为小数
 //#define GapValue 106.5
-#define GapValue 903.2		// for 1kg bar
+//#define GapValue 903.2		// for 1kg bar
+//#define GapValue 106.5		// for 20kg bar
+//#define GapValue 101.5		// for 20kg bar
+#define GapValue 99.0		// for 20kg bar
 
 void HX711_Init(void)
 {
diff --git a/STM32CubeIDE/Release/WL55JC_AS923.bin b/STM32CubeIDE/Release/WL55JC_AS923.bin
index e015525..4008d92 100644
Binary files a/STM32CubeIDE/Release/WL55JC_AS923.bin and b/STM32CubeIDE/Release/WL55JC_AS923.bin differ