diff --git a/components/driver_bt/bt_app_sink.c b/components/driver_bt/bt_app_sink.c
index 63ac11ff..bf91ea49 100644
--- a/components/driver_bt/bt_app_sink.c
+++ b/components/driver_bt/bt_app_sink.c
@@ -62,7 +62,7 @@ static void bt_av_hdl_a2d_evt(uint16_t event, void *p_param);
 static void bt_av_hdl_avrc_ct_evt(uint16_t event, void *p_param);
 /* avrc TG event handler */
 static void bt_av_hdl_avrc_tg_evt(uint16_t event, void *p_param);
-static void volume_set_by_local_host(uint8_t volume);
+static void volume_set_by_local_host(int value, bool is_step);
 static void bt_av_notify_evt_handler(uint8_t event_id, esp_avrc_rn_param_t *event_parameter);
 
 static const char *s_a2d_conn_state_str[] = {"Disconnected", "Connecting", "Connected", "Disconnecting"};
@@ -70,7 +70,7 @@ static const char *s_a2d_audio_state_str[] = {"Suspended", "Stopped", "Started"}
 static esp_avrc_rn_evt_cap_mask_t s_avrc_peer_rn_cap;
 
 static _lock_t s_volume_lock;
-static uint8_t s_volume = 0;
+static int s_volume, abs_volume, sink_volume;
 static bool s_volume_notify;
 static enum { AUDIO_IDLE, AUDIO_CONNECTED, AUDIO_PLAYING } s_audio = AUDIO_IDLE;
 
@@ -90,16 +90,14 @@ static EXT_RAM_ATTR struct {
 
 static void bt_volume_up(bool pressed) {
 	if (!pressed) return;
-	// volume UP/DOWN buttons are not supported by iPhone/Android
-	volume_set_by_local_host(s_volume < 127-3 ? s_volume + 3 : 127);
+	volume_set_by_local_host(+3, true);
 	(*bt_app_a2d_cmd_cb)(BT_SINK_VOLUME, s_volume);
 	ESP_LOGD(BT_AV_TAG, "BT volume up %u", s_volume);
 }
 
 static void bt_volume_down(bool pressed) {
 	if (!pressed) return;
-	// volume UP/DOWN buttons are not supported by iPhone/Android
-	volume_set_by_local_host(s_volume > 3 ? s_volume - 3 : 0);
+	volume_set_by_local_host(-3, true);
 	(*bt_app_a2d_cmd_cb)(BT_SINK_VOLUME, s_volume);
 }
 
@@ -284,6 +282,8 @@ static void bt_av_hdl_a2d_evt(uint16_t event, void *p_param)
             esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE);
 			(*bt_app_a2d_cmd_cb)(BT_SINK_DISCONNECTED);
         } else if (a2d->conn_stat.state == ESP_A2D_CONNECTION_STATE_CONNECTED){
+			abs_volume = -1;
+			s_volume = sink_volume;
             esp_bt_gap_set_scan_mode(ESP_BT_NON_CONNECTABLE, ESP_BT_NON_DISCOVERABLE);
 			(*bt_app_a2d_cmd_cb)(BT_SINK_CONNECTED);
         }
@@ -491,20 +491,29 @@ static void bt_av_hdl_avrc_ct_evt(uint16_t event, void *p_param)
 
 static void volume_set_by_controller(uint8_t volume)
 {
-    ESP_LOGD(BT_RC_TG_TAG, "Volume is set by remote controller %d%%\n", (uint32_t)volume * 100 / 0x7f);
+	// do not modified NVS volume
     _lock_acquire(&s_volume_lock);
-    s_volume = volume;
+    s_volume = abs_volume = (volume * 100) / 127;
     _lock_release(&s_volume_lock);
-	(*bt_app_a2d_cmd_cb)(BT_SINK_VOLUME, volume);
+	(*bt_app_a2d_cmd_cb)(BT_SINK_VOLUME, s_volume);
 }
 
-static void volume_set_by_local_host(uint8_t volume)
+static void volume_set_by_local_host(int value, bool is_step)
 {
-    ESP_LOGD(BT_RC_TG_TAG, "Volume is set locally to: %d%%", (uint32_t)volume * 100 / 0x7f);
-    _lock_acquire(&s_volume_lock);
-    s_volume = volume;
-    _lock_release(&s_volume_lock);
+	_lock_acquire(&s_volume_lock);
+	s_volume = is_step ? s_volume + value : value;
+	if (s_volume > 127) s_volume = 127;
+	else if (s_volume < 0) s_volume = 0;	
+	if (abs_volume >= 0) abs_volume = s_volume;
+	else sink_volume = s_volume;
+	_lock_release(&s_volume_lock);
 
+	// volume has been set by controller, do not store it in NVS	
+	if (abs_volume < 0) {
+		char p[4];
+		config_set_value(NVS_TYPE_STR, "bt_sink_volume", itoa(s_volume, p, 10));					
+	}
+	
     if (s_volume_notify) {
         esp_avrc_rn_param_t rn_param;
         rn_param.volume = s_volume;
@@ -529,7 +538,7 @@ static void bt_av_hdl_avrc_tg_evt(uint16_t event, void *p_param)
         break;
     }
     case ESP_AVRC_TG_SET_ABSOLUTE_VOLUME_CMD_EVT: {
-        ESP_LOGD(BT_RC_TG_TAG, "AVRC set absolute volume: %d%%", (int)rc->set_abs_vol.volume * 100/ 0x7f);
+        ESP_LOGD(BT_RC_TG_TAG, "AVRC set absolute volume: %d%%", (rc->set_abs_vol.volume * 100) / 127);
         volume_set_by_controller(rc->set_abs_vol.volume);
         break;
     }
@@ -597,6 +606,10 @@ void bt_sink_init(bt_cmd_vcb_t cmd_cb, bt_data_cb_t data_cb)
     esp_bt_gap_set_security_param(param_type, &iocap, sizeof(uint8_t));
 #endif
 
+	char *item = config_alloc_get_default(NVS_TYPE_STR, "bt_sink_volume", "127", 0);
+	sink_volume = atol(item);
+	free(item);
+
     /*
      * Set default parameters for Legacy Pairing
      */
@@ -630,6 +643,7 @@ void bt_sink_init(bt_cmd_vcb_t cmd_cb, bt_data_cb_t data_cb)
     	esp_pin_code[3]='4';
     }
     esp_bt_gap_set_pin(pin_type, strlen(pin_code), esp_pin_code);
+	free(pin_code);
 }
 
 void bt_sink_deinit(void)
diff --git a/main/esp_app_main.c b/main/esp_app_main.c
index 2fe15639..29a3facb 100644
--- a/main/esp_app_main.c
+++ b/main/esp_app_main.c
@@ -280,33 +280,43 @@ void register_default_nvs(){
 
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "autoexec", "1");
 	config_set_default(NVS_TYPE_STR,"autoexec","1", 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "autoexec1",default_command_line);
 	config_set_default(NVS_TYPE_STR,"autoexec1",default_command_line,0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "a2dp_sink_name", CONFIG_A2DP_SINK_NAME);
 	config_set_default(NVS_TYPE_STR, "a2dp_sink_name", CONFIG_A2DP_SINK_NAME, 0);
-	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "bt_sink_pin", STR(CONFIG_BT_SINK_PIN));
-	config_set_default(NVS_TYPE_STR, "a2dp_ctmt", STR(CONFIG_A2DP_CONNECT_TIMEOUT_MS), 0);
-	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "bt_sink_pin", STR(CONFIG_A2DP_CONNECT_TIMEOUT_MS));
-	config_set_default(NVS_TYPE_STR, "a2dp_ctrld", STR(CONFIG_A2DP_CONTROL_DELAY_MS), 0);
-	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "bt_sink_pin", STR(CONFIG_A2DP_CONTROL_DELAY_MS));
 
-	config_set_default(NVS_TYPE_STR, "bt_sink_pin", STR(CONFIG_BT_SINK_PIN), 0);
+	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "a2dp_sink_name", STR(CONFIG_A2DP_SINK_NAME));
+	config_set_default(NVS_TYPE_STR, "a2dp_ctmt", STR(CONFIG_A2DP_CONNECT_TIMEOUT_MS), 0);
+	
+	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "a2dp_ctmt", STR(CONFIG_A2DP_CONNECT_TIMEOUT_MS));
+	config_set_default(NVS_TYPE_STR, "a2dp_ctrld", STR(CONFIG_A2DP_CONTROL_DELAY_MS), 0);
+	
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "release_url", SQUEEZELITE_ESP32_RELEASE_URL);
 	config_set_default(NVS_TYPE_STR, "release_url", SQUEEZELITE_ESP32_RELEASE_URL, 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s","ap_ip_address",CONFIG_DEFAULT_AP_IP );
 	config_set_default(NVS_TYPE_STR, "ap_ip_address",CONFIG_DEFAULT_AP_IP , 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "ap_ip_gateway",CONFIG_DEFAULT_AP_GATEWAY );
 	config_set_default(NVS_TYPE_STR, "ap_ip_gateway",CONFIG_DEFAULT_AP_GATEWAY , 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s","ap_ip_netmask",CONFIG_DEFAULT_AP_NETMASK );
 	config_set_default(NVS_TYPE_STR, "ap_ip_netmask",CONFIG_DEFAULT_AP_NETMASK , 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "ap_channel",STR(CONFIG_DEFAULT_AP_CHANNEL));
 	config_set_default(NVS_TYPE_STR, "ap_channel",STR(CONFIG_DEFAULT_AP_CHANNEL) , 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "ap_pwd", CONFIG_DEFAULT_AP_PASSWORD);
 	config_set_default(NVS_TYPE_STR, "ap_pwd", CONFIG_DEFAULT_AP_PASSWORD, 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "airplay_port", CONFIG_AIRPLAY_PORT);
 	config_set_default(NVS_TYPE_STR, "airplay_port", CONFIG_AIRPLAY_PORT, 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "a2dp_dev_name", CONFIG_A2DP_DEV_NAME);
 	config_set_default(NVS_TYPE_STR, "a2dp_dev_name", CONFIG_A2DP_DEV_NAME, 0);
+
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "bypass_wm", "0");
 	config_set_default(NVS_TYPE_STR, "bypass_wm", "0", 0);
 
@@ -334,6 +344,12 @@ void register_default_nvs(){
 
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "enable_bt_sink", STR(CONFIG_BT_SINK));
 	config_set_default(NVS_TYPE_STR, "enable_bt_sink", STR(CONFIG_BT_SINK), 0);
+
+	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "bt_sink_pin", STR(CONFIG_BT_SINK_PIN));
+	config_set_default(NVS_TYPE_STR, "bt_sink_pin", STR(CONFIG_BT_SINK_PIN), 0);
+	
+	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "bt_sink_volume", "127");
+	config_set_default(NVS_TYPE_STR, "bt_sink_volume", "127", 0);
 	
 	ESP_LOGD(TAG,"Registering default value for key %s, value %s", "enable_airplay", STR(CONFIG_AIRPLAY_SINK));
 	config_set_default(NVS_TYPE_STR, "enable_airplay", STR(CONFIG_AIRPLAY_SINK), 0);