diff --git a/Core/Src/yunhorn_sts_presence_rss.c b/Core/Src/yunhorn_sts_presence_rss.c
index ecd3b8e..e101361 100644
--- a/Core/Src/yunhorn_sts_presence_rss.c
+++ b/Core/Src/yunhorn_sts_presence_rss.c
@@ -413,7 +413,7 @@ int sts_presence_rss_fall_rise_detection(void)
 	APP_LOG(TS_OFF, VLEVEL_H,"First Half Presence Detection, Motion Count  = %u \r\n", (int)motion_count);
 #endif
 // ********  Second Half detection of fall down and rise up
-if (sts_presence_fall_detection == 1)
+//if (sts_presence_fall_detection == 1)
 {
 	set_default_fall_rise_configuration(presence_configuration);
 
diff --git a/Core/Src/yunhorn_sts_process.c b/Core/Src/yunhorn_sts_process.c
index 734a0ae..63ca460 100644
--- a/Core/Src/yunhorn_sts_process.c
+++ b/Core/Src/yunhorn_sts_process.c
@@ -72,7 +72,7 @@ extern volatile uint16_t sts_fall_rising_pattern_factor1;
 extern volatile uint16_t sts_roc_acc_standard_variance;
 extern uint8_t luminance_level;
 SysTime_t mems_event_time;
-
+volatile uint32_t last_sts_rss_time_stamp=0;
 extern volatile uint8_t sts_reed_hall_ext_int;
 volatile uint8_t sts_occupancy_status;
 volatile uint8_t sts_hall1_changed_flag=0, sts_hall2_changed_flag=0, last_sts_hall1_result=0, last_sts_hall2_result=0;
@@ -864,11 +864,17 @@ void OnSensor2StateChanged(void)
 void OnSensor3StateChanged(void)
 {
 	SysTime_t sensor_event_time = SysTimeGetMcuTime();
+	if ((sensor_event_time.Seconds - last_sts_rss_time_stamp) < 3 )	//less than 3 seconds ... return for flipping filter
+		{
+			return ;
+		}
+
 	if (sts_rss_result == STS_RESULT_MOTION)
 	{
 		sts_o7_sensorData.event_sensor3_start_time = sensor_event_time.Seconds;
 		sts_o7_sensorData.event_sensor3_duration = 0;
 	}
+	last_sts_rss_time_stamp = sensor_event_time.Seconds;
 }
 
 void OnSensor4StateChanged(void)