diff --git a/src/btstack_defines.h b/src/btstack_defines.h
index e6355f17b..a75bd74fa 100644
--- a/src/btstack_defines.h
+++ b/src/btstack_defines.h
@@ -321,6 +321,7 @@ typedef uint8_t sm_key_t[16];
  * @param remote_name
  */
 #define HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE             0x07u
+
 /**
  * @format 121
  * @param status
@@ -328,12 +329,14 @@ typedef uint8_t sm_key_t[16];
  * @param encryption_enabled 
  */
 #define HCI_EVENT_ENCRYPTION_CHANGE                        0x08u
+
 /**
  * @format 12
  * @param status
  * @param connection_handle
  */
 #define HCI_EVENT_CHANGE_CONNECTION_LINK_KEY_COMPLETE      0x09u
+
 /**
  * @format 121
  * @param status
@@ -421,6 +424,9 @@ typedef uint8_t sm_key_t[16];
 // TODO: bd_addr B, link_key 16octets, key_type 1
 #define HCI_EVENT_LINK_KEY_NOTIFICATION                    0x18u
 
+// event params contains HCI ccommand
+#define HCI_EVENT_LOOPBACK_COMMAND                         0x19u
+
 /**
  * @format 1
  * @param link_type
@@ -451,7 +457,37 @@ typedef uint8_t sm_key_t[16];
  */
 #define HCI_EVENT_CONNECTION_PACKET_TYPE_CHANGED           0x1Du
 
-/** 
+/**
+ * @format H
+ * @param handle
+ */
+#define HCI_EVENT_QOS_VIOLATION                            0x1Eu
+
+// 0x1f not defined
+
+/**
+ * @format H1
+ * @param handle
+ * @param page_scan_repetition_mode
+ */
+#define HCI_EVENT_PAGE_SCAN_REPETITION_MODE_CHANGE         0x20u
+
+/**
+ * @format 1H1114444
+ * @param status
+ * @param handle
+ * @param unused
+ * @param flow_direction
+ * @param service_type
+ * @param token_rate
+ * @param token_bucket_size
+ * @param peak_bandwidth
+ * @param access_latency
+ *
+ */
+#define HCI_EVENT_FLOW_SPECIFICATION_COMPLETE              0x21u
+
+/**
  * @format 1B11321
  * @param num_responses
  * @param bd_addr
@@ -465,6 +501,8 @@ typedef uint8_t sm_key_t[16];
 
 #define HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE   0x23u
 
+// 0x24..0x2b not defined
+
 /**
  * @format 1HB111221
  * @param status
@@ -479,8 +517,31 @@ typedef uint8_t sm_key_t[16];
  */
 #define HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE          0x2Cu
 
+/**
+ * @format 1H1122
+ * @param status
+ * @param handle
+ * @param transmission_interval
+ * @param retransmission_interval
+ * @param rx_packet_length
+ * @param tx_packet_length
+ */
+#define HCI_EVENT_SYNCHRONOUS_CONNECTION_CHANGED          0x2Du
+
+/**
+ * @format 1H2222
+ * @param status
+ * @param handle
+ * @param max_tx_latency
+ * @param max_rx_latency
+ * @param min_remote_timeout
+ * @param min_local_timeout
+ */
+#define HCI_EVENT_SNIFF_SUBRATING                         0x2Eu
+
 // TODO: serialize extended_inquiry_response and provide parser
-/** 
+
+/**
  * @format 1B11321
  * @param num_responses
  * @param bd_addr
@@ -540,6 +601,21 @@ typedef uint8_t sm_key_t[16];
  */
 #define HCI_EVENT_SIMPLE_PAIRING_COMPLETE                  0x36u
 
+/**
+ * @format H2
+ * @param handle
+ * @param link_supervision_timeout
+ */
+#define HCI_EVENT_LINK_SUPERVISION_TIMEOUT_CHANGED         0x38u
+
+/**
+ * @format H
+ * @param handle
+ */
+#define HCI_EVENT_ENHANCED_FLUSH_COMPLETE                  0x39u
+
+// 0x03a not defined
+
 /**
  * @format B4
  * @param bd_addr
@@ -554,11 +630,26 @@ typedef uint8_t sm_key_t[16];
  */
 #define HCI_EVENT_KEYPRESS_NOTIFICATION                    0x3Cu
 
+#define HCI_EVENT_REMOTE_HOST_SUPPORTED_FEATURES           0x3Du
+
 #define HCI_EVENT_LE_META                                  0x3Eu
 
-// last used HCI_EVENT in 2.1 is 0x3du
-// last used HCI_EVENT in 4.1 is 0x57u
-// last used HCI_EVENT in 5.2 is 0x58u
+// 0x3f..0x47 not defined
+
+#define HCI_EVENT_NUMBER_OF_COMPLETED_DATA_BLOCKS          0x48u
+
+// 0x49..0x58 not defined
+
+/**
+ * @format 1211
+ * @param status
+ * @param connection_handle
+ * @param encryption_enabled
+ * @param encryption_key_zie
+ */
+#define HCI_EVENT_ENCRYPTION_CHANGE_V2                     0x59u
+
+// last used HCI_EVENT in 5.3 is 0x59u
 
 #define HCI_EVENT_VENDOR_SPECIFIC                          0xFFu
 
diff --git a/src/btstack_event.h b/src/btstack_event.h
index db9593bea..5900e4927 100644
--- a/src/btstack_event.h
+++ b/src/btstack_event.h
@@ -778,6 +778,117 @@ static inline uint16_t hci_event_connection_packet_type_changed_get_packet_types
     return little_endian_read_16(event, 5);
 }
 
+/**
+ * @brief Get field handle from event HCI_EVENT_QOS_VIOLATION
+ * @param event packet
+ * @return handle
+ * @note: btstack_type H
+ */
+static inline hci_con_handle_t hci_event_qos_violation_get_handle(const uint8_t * event){
+    return little_endian_read_16(event, 2);
+}
+
+/**
+ * @brief Get field handle from event HCI_EVENT_PAGE_SCAN_REPETITION_MODE_CHANGE
+ * @param event packet
+ * @return handle
+ * @note: btstack_type H
+ */
+static inline hci_con_handle_t hci_event_page_scan_repetition_mode_change_get_handle(const uint8_t * event){
+    return little_endian_read_16(event, 2);
+}
+/**
+ * @brief Get field page_scan_repetition_mode from event HCI_EVENT_PAGE_SCAN_REPETITION_MODE_CHANGE
+ * @param event packet
+ * @return page_scan_repetition_mode
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_page_scan_repetition_mode_change_get_page_scan_repetition_mode(const uint8_t * event){
+    return event[4];
+}
+
+/**
+ * @brief Get field status from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return status
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_flow_specification_complete_get_status(const uint8_t * event){
+    return event[2];
+}
+/**
+ * @brief Get field handle from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return handle
+ * @note: btstack_type H
+ */
+static inline hci_con_handle_t hci_event_flow_specification_complete_get_handle(const uint8_t * event){
+    return little_endian_read_16(event, 3);
+}
+/**
+ * @brief Get field unused from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return unused
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_flow_specification_complete_get_unused(const uint8_t * event){
+    return event[5];
+}
+/**
+ * @brief Get field flow_direction from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return flow_direction
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_flow_specification_complete_get_flow_direction(const uint8_t * event){
+    return event[6];
+}
+/**
+ * @brief Get field service_type from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return service_type
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_flow_specification_complete_get_service_type(const uint8_t * event){
+    return event[7];
+}
+/**
+ * @brief Get field token_rate from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return token_rate
+ * @note: btstack_type 4
+ */
+static inline uint32_t hci_event_flow_specification_complete_get_token_rate(const uint8_t * event){
+    return little_endian_read_32(event, 8);
+}
+/**
+ * @brief Get field token_bucket_size from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return token_bucket_size
+ * @note: btstack_type 4
+ */
+static inline uint32_t hci_event_flow_specification_complete_get_token_bucket_size(const uint8_t * event){
+    return little_endian_read_32(event, 12);
+}
+/**
+ * @brief Get field peak_bandwidth from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return peak_bandwidth
+ * @note: btstack_type 4
+ */
+static inline uint32_t hci_event_flow_specification_complete_get_peak_bandwidth(const uint8_t * event){
+    return little_endian_read_32(event, 16);
+}
+/**
+ * @brief Get field access_latency from event HCI_EVENT_FLOW_SPECIFICATION_COMPLETE
+ * @param event packet
+ * @return access_latency
+ * @note: btstack_type 4
+ */
+static inline uint32_t hci_event_flow_specification_complete_get_access_latency(const uint8_t * event){
+    return little_endian_read_32(event, 20);
+}
+
 /**
  * @brief Get field num_responses from event HCI_EVENT_INQUIRY_RESULT_WITH_RSSI
  * @param event packet
@@ -924,6 +1035,116 @@ static inline uint8_t hci_event_synchronous_connection_complete_get_air_mode(con
     return event[18];
 }
 
+/**
+ * @brief Get field status from event HCI_EVENT_SYNCHRONOUS_CONNECTION_CHANGED
+ * @param event packet
+ * @return status
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_synchronous_connection_changed_get_status(const uint8_t * event){
+    return event[2];
+}
+/**
+ * @brief Get field handle from event HCI_EVENT_SYNCHRONOUS_CONNECTION_CHANGED
+ * @param event packet
+ * @return handle
+ * @note: btstack_type H
+ */
+static inline hci_con_handle_t hci_event_synchronous_connection_changed_get_handle(const uint8_t * event){
+    return little_endian_read_16(event, 3);
+}
+/**
+ * @brief Get field transmission_interval from event HCI_EVENT_SYNCHRONOUS_CONNECTION_CHANGED
+ * @param event packet
+ * @return transmission_interval
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_synchronous_connection_changed_get_transmission_interval(const uint8_t * event){
+    return event[5];
+}
+/**
+ * @brief Get field retransmission_interval from event HCI_EVENT_SYNCHRONOUS_CONNECTION_CHANGED
+ * @param event packet
+ * @return retransmission_interval
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_synchronous_connection_changed_get_retransmission_interval(const uint8_t * event){
+    return event[6];
+}
+/**
+ * @brief Get field rx_packet_length from event HCI_EVENT_SYNCHRONOUS_CONNECTION_CHANGED
+ * @param event packet
+ * @return rx_packet_length
+ * @note: btstack_type 2
+ */
+static inline uint16_t hci_event_synchronous_connection_changed_get_rx_packet_length(const uint8_t * event){
+    return little_endian_read_16(event, 7);
+}
+/**
+ * @brief Get field tx_packet_length from event HCI_EVENT_SYNCHRONOUS_CONNECTION_CHANGED
+ * @param event packet
+ * @return tx_packet_length
+ * @note: btstack_type 2
+ */
+static inline uint16_t hci_event_synchronous_connection_changed_get_tx_packet_length(const uint8_t * event){
+    return little_endian_read_16(event, 9);
+}
+
+/**
+ * @brief Get field status from event HCI_EVENT_SNIFF_SUBRATING
+ * @param event packet
+ * @return status
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_sniff_subrating_get_status(const uint8_t * event){
+    return event[2];
+}
+/**
+ * @brief Get field handle from event HCI_EVENT_SNIFF_SUBRATING
+ * @param event packet
+ * @return handle
+ * @note: btstack_type H
+ */
+static inline hci_con_handle_t hci_event_sniff_subrating_get_handle(const uint8_t * event){
+    return little_endian_read_16(event, 3);
+}
+/**
+ * @brief Get field max_tx_latency from event HCI_EVENT_SNIFF_SUBRATING
+ * @param event packet
+ * @return max_tx_latency
+ * @note: btstack_type 2
+ */
+static inline uint16_t hci_event_sniff_subrating_get_max_tx_latency(const uint8_t * event){
+    return little_endian_read_16(event, 5);
+}
+/**
+ * @brief Get field max_rx_latency from event HCI_EVENT_SNIFF_SUBRATING
+ * @param event packet
+ * @return max_rx_latency
+ * @note: btstack_type 2
+ */
+static inline uint16_t hci_event_sniff_subrating_get_max_rx_latency(const uint8_t * event){
+    return little_endian_read_16(event, 7);
+}
+/**
+ * @brief Get field min_remote_timeout from event HCI_EVENT_SNIFF_SUBRATING
+ * @param event packet
+ * @return min_remote_timeout
+ * @note: btstack_type 2
+ */
+static inline uint16_t hci_event_sniff_subrating_get_min_remote_timeout(const uint8_t * event){
+    return little_endian_read_16(event, 9);
+}
+/**
+ * @brief Get field min_local_timeout from event HCI_EVENT_SNIFF_SUBRATING
+ * @param event packet
+ * @return min_local_timeout
+ * @note: btstack_type 2
+ */
+static inline uint16_t hci_event_sniff_subrating_get_min_local_timeout(const uint8_t * event){
+    return little_endian_read_16(event, 11);
+}
+
 /**
  * @brief Get field num_responses from event HCI_EVENT_EXTENDED_INQUIRY_RESPONSE
  * @param event packet
@@ -1112,6 +1333,35 @@ static inline void hci_event_simple_pairing_complete_get_bd_addr(const uint8_t *
     reverse_bytes(&event[3], bd_addr, 6);
 }
 
+/**
+ * @brief Get field handle from event HCI_EVENT_LINK_SUPERVISION_TIMEOUT_CHANGED
+ * @param event packet
+ * @return handle
+ * @note: btstack_type H
+ */
+static inline hci_con_handle_t hci_event_link_supervision_timeout_changed_get_handle(const uint8_t * event){
+    return little_endian_read_16(event, 2);
+}
+/**
+ * @brief Get field link_supervision_timeout from event HCI_EVENT_LINK_SUPERVISION_TIMEOUT_CHANGED
+ * @param event packet
+ * @return link_supervision_timeout
+ * @note: btstack_type 2
+ */
+static inline uint16_t hci_event_link_supervision_timeout_changed_get_link_supervision_timeout(const uint8_t * event){
+    return little_endian_read_16(event, 4);
+}
+
+/**
+ * @brief Get field handle from event HCI_EVENT_ENHANCED_FLUSH_COMPLETE
+ * @param event packet
+ * @return handle
+ * @note: btstack_type H
+ */
+static inline hci_con_handle_t hci_event_enhanced_flush_complete_get_handle(const uint8_t * event){
+    return little_endian_read_16(event, 2);
+}
+
 /**
  * @brief Get field bd_addr from event HCI_EVENT_USER_PASSKEY_NOTIFICATION
  * @param event packet
@@ -1150,6 +1400,43 @@ static inline uint8_t hci_event_keypress_notification_get_notification_type(cons
     return event[8];
 }
 
+/**
+ * @brief Get field status from event HCI_EVENT_ENCRYPTION_CHANGE_V2
+ * @param event packet
+ * @return status
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_encryption_change_v2_get_status(const uint8_t * event){
+    return event[2];
+}
+/**
+ * @brief Get field connection_handle from event HCI_EVENT_ENCRYPTION_CHANGE_V2
+ * @param event packet
+ * @return connection_handle
+ * @note: btstack_type 2
+ */
+static inline uint16_t hci_event_encryption_change_v2_get_connection_handle(const uint8_t * event){
+    return little_endian_read_16(event, 3);
+}
+/**
+ * @brief Get field encryption_enabled from event HCI_EVENT_ENCRYPTION_CHANGE_V2
+ * @param event packet
+ * @return encryption_enabled
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_encryption_change_v2_get_encryption_enabled(const uint8_t * event){
+    return event[5];
+}
+/**
+ * @brief Get field encryption_key_zie from event HCI_EVENT_ENCRYPTION_CHANGE_V2
+ * @param event packet
+ * @return encryption_key_zie
+ * @note: btstack_type 1
+ */
+static inline uint8_t hci_event_encryption_change_v2_get_encryption_key_zie(const uint8_t * event){
+    return event[6];
+}
+
 /**
  * @brief Get field state from event BTSTACK_EVENT_STATE
  * @param event packet