diff --git a/app/src/app_ble_service.c b/app/src/app_ble_service.c
index 9d09638..c1f9993 100644
--- a/app/src/app_ble_service.c
+++ b/app/src/app_ble_service.c
@@ -297,7 +297,7 @@ static void prvf_process_ble_rx_data(void* p_event_data, uint16_t len) {
     sensor_info_receipt_t* receipt = (sensor_info_receipt_t*)txheader->data;
     uint16_t               sendlen = sizeof(ify_hrs_packet_t) + sizeof(sensor_info_receipt_t);
 
-    receipt->sensor_num         = 1;
+    receipt->sensor_num         = APP_SENSOR_NUM;
     receipt->sensor_precision   = SAMPLE_PRECISION;
     receipt->sensor_sample_rate = SAMPLE_RATE / 10;
     receipt->sensor0_pos        = kifyhrs_sensor_pos_II;