diff --git a/app/src/ble_data_processer_utils.c b/app/src/ble_data_processer_utils.c
index 047556f..ef3e5e3 100644
--- a/app/src/ble_data_processer_utils.c
+++ b/app/src/ble_data_processer_utils.c
@@ -45,7 +45,14 @@ void report_ecg_data(app_event_t* data) {
   reportpacket->sample_data_num                 = ECG_DATA_REPORT_FRAME_NUM;
 
   for (int i = 0; i < ECG_DATA_REPORT_FRAME_NUM; i++) {
-    reportpacket->frame[i] = data->val.ecg_data_report_event.ecgData->frame[i].data;
+    int32_t frame = data->val.ecg_data_report_event.ecgData->frame[i].data;
+    if (frame >= INT16_MAX) {
+      reportpacket->frame[i] = INT16_MAX;
+    } else if (frame <= INT16_MIN) {
+      reportpacket->frame[i] = INT16_MIN;
+    } else {
+      reportpacket->frame[i] = frame;
+    }
   }
   uint8_t leadoffstate = 0;
   for (int i = 0; i < ECG_DATA_REPORT_FRAME_NUM; i++) {