diff --git a/app/src/app_basic_service/device_version_info_mgr.c b/app/src/app_basic_service/device_version_info_mgr.c
index d7b66d6..f2e0b7a 100644
--- a/app/src/app_basic_service/device_version_info_mgr.c
+++ b/app/src/app_basic_service/device_version_info_mgr.c
@@ -54,7 +54,7 @@ void device_info_read_sn(sn_t *sn) {
   uint32_t    id  = NRF_UICR->CUSTOMER[1];
   static char sn_str[15];
   if ((lot == 0 && id == 0) || lot == 0xffffffff || id == 0xffffffff) {
-    sprintf(sn_str, "%s-%s", "IFLYTOP", "TEST");
+    sprintf(sn_str, "%s%04d%05d", CATEGORY, 0, 0);
   } else {
     sprintf(sn_str, "%s%04d%05d", CATEGORY, lot, id);
   }
diff --git a/app/src/app_service/ecg_service/algo/iflytop_simple_filter.c b/app/src/app_service/ecg_service/algo/iflytop_simple_filter.c
index c9ccc1c..e653e86 100644
--- a/app/src/app_service/ecg_service/algo/iflytop_simple_filter.c
+++ b/app/src/app_service/ecg_service/algo/iflytop_simple_filter.c
@@ -181,3 +181,34 @@ float median_filter_update(median_filter_t *filter, float val) {
     return filter->temp[filter->numVal / 2];
   }
 }
+
+void SmoothingFilter_Init(SmoothingFilter_t *filter, int windows_size, bool enable) {
+  if (windows_size > SMOOTHINGFILTER_MAX_SIZE) {
+    windows_size = SMOOTHINGFILTER_MAX_SIZE;
+    return;
+  }
+  filter->windows_size = windows_size;
+  filter->datanum      = 0;
+  filter->sum          = 0;
+  filter->datanum      = 0;
+  for (int i = 0; i < windows_size; i++) {
+    filter->datawindows[i] = 0;
+  }
+  filter->data_offset = 0;
+  filter->enable      = enable;
+}
+float SmoothingFilter_Update(SmoothingFilter_t *filter, float vin) {
+  if (!filter->enable) return vin;
+
+  filter->sum -= filter->datawindows[filter->data_offset];
+  filter->datawindows[filter->data_offset] = vin;
+  filter->sum += filter->datawindows[filter->data_offset];
+  filter->data_offset = (filter->data_offset + 1) % filter->windows_size;
+
+  filter->datanum++;
+  if (filter->datanum > filter->windows_size) {
+    filter->datanum = filter->windows_size;
+  }
+
+  return filter->sum / filter->datanum;
+}
\ No newline at end of file
diff --git a/app/src/app_service/ecg_service/algo/iflytop_simple_filter.h b/app/src/app_service/ecg_service/algo/iflytop_simple_filter.h
index 04627eb..ffc4f12 100644
--- a/app/src/app_service/ecg_service/algo/iflytop_simple_filter.h
+++ b/app/src/app_service/ecg_service/algo/iflytop_simple_filter.h
@@ -80,4 +80,18 @@ typedef struct {
 void  median_filter_init(median_filter_t *filter, int medianSize);
 float median_filter_update(median_filter_t *filter, float val);
 
+#define SMOOTHINGFILTER_MAX_SIZE 50
+typedef struct {
+  float datawindows[SMOOTHINGFILTER_MAX_SIZE];
+  int   windows_size;
+  int   datanum;
+  int   data_offset;
+  float sum;
+  bool  enable;
+} SmoothingFilter_t;
+
+void  SmoothingFilter_Init(SmoothingFilter_t *filter, int windows_size, bool enable);
+float SmoothingFilter_Update(SmoothingFilter_t *filter, float vin);
+
+
 #endif
\ No newline at end of file
diff --git a/app/src/app_service/ecg_service/ecg_algo.c b/app/src/app_service/ecg_service/ecg_algo.c
index 80a9c6e..0238b8b 100644
--- a/app/src/app_service/ecg_service/ecg_algo.c
+++ b/app/src/app_service/ecg_service/ecg_algo.c
@@ -5,9 +5,10 @@
 #include "algo/zsimple_qrs.h"
 #include "znordic.h"
 
-LPFilterExt_t    m_lp_filter;
-HPFilterExt_t    m_hp_filter;
-NOTCHFilterExt_t m_notch_filter;
+LPFilterExt_t     m_lp_filter;
+HPFilterExt_t     m_hp_filter;
+NOTCHFilterExt_t  m_notch_filter;
+SmoothingFilter_t m_smoothingFilter;
 
 int32_t            m_data_statistics_buf[STATISTICS_BUF_SIZE];  // 心率判断
 zdata_statistics_t m_data_statistics;
@@ -33,6 +34,7 @@ void    ecg_algo_process_data(int32_t indata) {
 
   data       = LPFilterExt_update(&m_lp_filter, data);
   data       = NOTCHFilterExt_update(&m_notch_filter, data);
+  data       = SmoothingFilter_Update(&m_smoothingFilter, data);
   reportdata = data;
 
   zdata_statistics_push(&m_data_statistics, data);
@@ -57,9 +59,11 @@ void    ecg_algo_process_data(int32_t indata) {
   }
 }
 void ecg_algo_reset() {
-  LPFilterExt_init(&m_lp_filter, 40, SAMPLE_PERIOD_S, 13, true);
+  LPFilterExt_init(&m_lp_filter, 40, SAMPLE_PERIOD_S, 5, true);
   HPFilterExt_init(&m_hp_filter, 1, SAMPLE_PERIOD_S, 1, true);
-  NOTCHFilterExt_init(&m_notch_filter, 50, 10, SAMPLE_PERIOD_S, 3, false);
+  NOTCHFilterExt_init(&m_notch_filter, 125, 2, SAMPLE_PERIOD_S, 2, true);
+  SmoothingFilter_Init(&m_smoothingFilter, 8, true);
+
   zdata_statistics_clear(&m_data_statistics);
   zsimple_qrs_clear();
 }
diff --git a/app/src/app_service/ecg_service/ecg_service.c b/app/src/app_service/ecg_service/ecg_service.c
index 47a274b..2ae2416 100644
--- a/app/src/app_service/ecg_service/ecg_service.c
+++ b/app/src/app_service/ecg_service/ecg_service.c
@@ -207,14 +207,15 @@ static void leadoff_state_process(ads129x_capture_data_t* capture_data) {
   static uint32_t un_leadoffcnt = 0;
 
   bool leadoff = false;
-  if (ecg_algo_get_peak2peak() > 15000) {
-    leadoff = true;
-  }
-  if (ecg_algo_get_peak2peak() < 500) {
-    leadoff = true;
-  }
-  if (ecg_algo_get_data_after_high_pass_filter_data() > 25000 || ecg_algo_get_data_after_high_pass_filter_data() < -25000) {
+  // if (ecg_algo_get_peak2peak() > 15000) {
+  //   leadoff = true;
+  // }
+  // if (ecg_algo_get_peak2peak() < 500) {
+  //   leadoff = true;
+  // }
+  if (capture_data->ch1data > INT16_MAX || capture_data->ch1data < INT16_MIN) {
     leadoff = true;
+    
   }
   // if (capture_data->loffstate & 0x3) {
   //   leadoff = true;
diff --git a/app/src/aproject_config/config.h b/app/src/aproject_config/config.h
index a38cad7..6522921 100644
--- a/app/src/aproject_config/config.h
+++ b/app/src/aproject_config/config.h
@@ -7,7 +7,7 @@
 #define CATEGORY          "M1003"  // 单导联
 #define MANUFACTURER_NAME "iflytop"
 
-#define FIRMWARE_VERSION   (2)
+#define FIRMWARE_VERSION   (501)
 #define BLESTACK_VERSION   1
 #define BOOTLOADER_VERSION 1
 #define HARDWARE_VERSION   (2)
diff --git a/libznordic b/libznordic
index 6fb5f63..87862e2 160000
--- a/libznordic
+++ b/libznordic
@@ -1 +1 @@
-Subproject commit 6fb5f63c43ea9866bef9eacd918ddd00468fa4f6
+Subproject commit 87862e2d0f9e5d1e412ea2cd62b0ff90bdff7ec8
diff --git a/scripter/build_app.bat b/scripter/build_app.bat
index cc053b0..eb65bbb 100644
--- a/scripter/build_app.bat
+++ b/scripter/build_app.bat
@@ -6,8 +6,8 @@ call scripter\keil_build.bat app\app.uvprojx app\_build\app.hex
 
 del output\app_whole.hex
 del output\app.zip
-del output\one_lead_ecg.zip
-del output\one_lead_ecg.hex
+del output\one_lead_ecg_ads1291.zip
+del output\one_lead_ecg_ads1291.hex
 
 @REM 检查是否编译成功
 if not exist app\_build\app.hex (
@@ -59,5 +59,5 @@ del output\settings.hex
 del output\app.hex
 
 
-copy /y output\app.zip output\one_lead_ecg.zip
-copy /y output\app_whole.hex output\one_lead_ecg.hex
+copy /y output\app.zip output\one_lead_ecg_ads1291.zip
+copy /y output\app_whole.hex output\one_lead_ecg_ads1291.hex