diff --git a/applications/bt/bt_service/bt.c b/applications/bt/bt_service/bt.c
index 91cfad81..4fae0cf6 100755
--- a/applications/bt/bt_service/bt.c
+++ b/applications/bt/bt_service/bt.c
@@ -33,7 +33,10 @@ static void bt_battery_level_changed_callback(const void* _event, void* context)
     Bt* bt = context;
     const PowerEvent* event = _event;
     if(event->type == PowerEventTypeBatteryLevelChanged) {
-        bt_update_battery_level(bt, event->data.battery_level);
+        BtMessage message = {
+            .type = BtMessageTypeUpdateBatteryLevel,
+            .data.battery_level = event->data.battery_level};
+        furi_check(osMessageQueuePut(bt->message_queue, &message, 0, osWaitForever) == osOK);
     }
 }
 
@@ -61,9 +64,84 @@ Bt* bt_alloc() {
     PubSub* power_pubsub = power_get_pubsub(bt->power);
     subscribe_pubsub(power_pubsub, bt_battery_level_changed_callback, bt);
 
+    // RPC
+    bt->rpc = furi_record_open("rpc");
+    bt->rpc_sem = osSemaphoreNew(1, 0, NULL);
+
     return bt;
 }
 
+// Called from GAP thread from Serial service
+static void bt_on_data_received_callback(uint8_t* data, uint16_t size, void* context) {
+    furi_assert(context);
+    Bt* bt = context;
+
+    size_t bytes_processed = rpc_feed_bytes(bt->rpc_session, data, size, 1000);
+    if(bytes_processed != size) {
+        FURI_LOG_E(BT_SERVICE_TAG, "Only %d of %d bytes processed by RPC", bytes_processed, size);
+    }
+}
+
+// Called from GAP thread from Serial service
+static void bt_on_data_sent_callback(void* context) {
+    furi_assert(context);
+    Bt* bt = context;
+
+    osSemaphoreRelease(bt->rpc_sem);
+}
+
+// Called from RPC thread
+static void bt_rpc_send_bytes_callback(void* context, uint8_t* bytes, size_t bytes_len) {
+    furi_assert(context);
+    Bt* bt = context;
+
+    size_t bytes_sent = 0;
+    while(bytes_sent < bytes_len) {
+        size_t bytes_remain = bytes_len - bytes_sent;
+        if(bytes_remain > FURI_HAL_BT_PACKET_SIZE_MAX) {
+            furi_hal_bt_tx(&bytes[bytes_sent], FURI_HAL_BT_PACKET_SIZE_MAX);
+            bytes_sent += FURI_HAL_BT_PACKET_SIZE_MAX;
+        } else {
+            furi_hal_bt_tx(&bytes[bytes_sent], bytes_remain);
+            bytes_sent += bytes_remain;
+        }
+        osSemaphoreAcquire(bt->rpc_sem, osWaitForever);
+    }
+}
+
+// Called from GAP thread
+static void bt_on_gap_event_callback(BleEvent event, void* context) {
+    furi_assert(context);
+    Bt* bt = context;
+
+    if(event.type == BleEventTypeConnected) {
+        FURI_LOG_I(BT_SERVICE_TAG, "Open RPC connection");
+        bt->rpc_session = rpc_open_session(bt->rpc);
+        rpc_set_send_bytes_callback(bt->rpc_session, bt_rpc_send_bytes_callback, bt);
+        furi_hal_bt_set_data_event_callbacks(
+            bt_on_data_received_callback, bt_on_data_sent_callback, bt);
+        // Update battery level
+        PowerInfo info;
+        power_get_info(bt->power, &info);
+        BtMessage message = {
+            .type = BtMessageTypeUpdateBatteryLevel, .data.battery_level = info.charge};
+        furi_check(osMessageQueuePut(bt->message_queue, &message, 0, osWaitForever) == osOK);
+    } else if(event.type == BleEventTypeDisconnected) {
+        FURI_LOG_I(BT_SERVICE_TAG, "Close RPC connection");
+        if(bt->rpc_session) {
+            rpc_close_session(bt->rpc_session);
+            bt->rpc_session = NULL;
+        }
+    } else if(event.type == BleEventTypeStartAdvertising || event.type == BleEventTypeStopAdvertising) {
+        BtMessage message = {.type = BtMessageTypeUpdateStatusbar};
+        furi_check(osMessageQueuePut(bt->message_queue, &message, 0, osWaitForever) == osOK);
+    } else if(event.type == BleEventTypePinCodeShow) {
+        BtMessage message = {
+            .type = BtMessageTypePinCodeShow, .data.pin_code = event.data.pin_code};
+        furi_check(osMessageQueuePut(bt->message_queue, &message, 0, osWaitForever) == osOK);
+    }
+}
+
 int32_t bt_srv() {
     Bt* bt = bt_alloc();
     furi_record_create("bt", bt);
@@ -72,11 +150,10 @@ int32_t bt_srv() {
         FURI_LOG_E(BT_SERVICE_TAG, "Core2 startup failed");
     } else {
         view_port_enabled_set(bt->statusbar_view_port, true);
-        if(furi_hal_bt_init_app()) {
+        if(furi_hal_bt_init_app(bt_on_gap_event_callback, bt)) {
             FURI_LOG_I(BT_SERVICE_TAG, "BLE stack started");
             if(bt->bt_settings.enabled) {
                 furi_hal_bt_start_advertising();
-                FURI_LOG_I(BT_SERVICE_TAG, "Start advertising");
             }
         } else {
             FURI_LOG_E(BT_SERVICE_TAG, "BT App start failed");
diff --git a/applications/bt/bt_service/bt.h b/applications/bt/bt_service/bt.h
index ccf5e501..0a2a924c 100644
--- a/applications/bt/bt_service/bt.h
+++ b/applications/bt/bt_service/bt.h
@@ -9,12 +9,6 @@ extern "C" {
 
 typedef struct Bt Bt;
 
-void bt_update_statusbar(Bt* bt);
-
-void bt_update_battery_level(Bt* bt, uint8_t battery_level);
-
-bool bt_pin_code_show(Bt* bt, uint32_t pin_code);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/applications/bt/bt_service/bt_api.c b/applications/bt/bt_service/bt_api.c
deleted file mode 100755
index db709871..00000000
--- a/applications/bt/bt_service/bt_api.c
+++ /dev/null
@@ -1,21 +0,0 @@
-#include "bt.h"
-#include "bt_i.h"
-
-void bt_update_statusbar(Bt* bt) {
-    furi_assert(bt);
-    BtMessage message = {.type = BtMessageTypeUpdateStatusbar};
-    furi_check(osMessageQueuePut(bt->message_queue, &message, 0, osWaitForever) == osOK);
-}
-
-void bt_update_battery_level(Bt* bt, uint8_t battery_level) {
-    furi_assert(bt);
-    BtMessage message = {
-        .type = BtMessageTypeUpdateBatteryLevel, .data.battery_level = battery_level};
-    furi_check(osMessageQueuePut(bt->message_queue, &message, 0, osWaitForever) == osOK);
-}
-
-bool bt_pin_code_show(Bt* bt, uint32_t pin_code) {
-    furi_assert(bt);
-    BtMessage message = {.type = BtMessageTypePinCodeShow, .data.pin_code = pin_code};
-    return osMessageQueuePut(bt->message_queue, &message, 0, 0) == osOK;
-}
diff --git a/applications/bt/bt_service/bt_i.h b/applications/bt/bt_service/bt_i.h
index 624c6c64..882061ee 100644
--- a/applications/bt/bt_service/bt_i.h
+++ b/applications/bt/bt_service/bt_i.h
@@ -11,6 +11,7 @@
 
 #include <dialogs/dialogs.h>
 #include <power/power_service/power.h>
+#include <applications/rpc/rpc.h>
 
 #include "../bt_settings.h"
 
@@ -38,4 +39,7 @@ struct Bt {
     DialogsApp* dialogs;
     DialogMessage* dialog_message;
     Power* power;
+    Rpc* rpc;
+    RpcSession* rpc_session;
+    osSemaphoreId_t rpc_sem;
 };
diff --git a/assets/Makefile b/assets/Makefile
index efa07a1f..079b7b2a 100644
--- a/assets/Makefile
+++ b/assets/Makefile
@@ -2,16 +2,20 @@ PROJECT_ROOT		= $(abspath $(dir $(abspath $(firstword $(MAKEFILE_LIST))))..)
 
 include				$(PROJECT_ROOT)/assets/assets.mk
 
-all_assets: $(ASSETS) $(PROTOBUF)
+all: icons protobuf
 
 $(ASSETS): $(ASSETS_SOURCES) $(ASSETS_COMPILLER)
 	@echo "\tASSETS\t\t" $@
 	@$(ASSETS_COMPILLER) icons "$(ASSETS_SOURCE_DIR)" "$(ASSETS_COMPILED_DIR)"
 
+icons: $(ASSETS)
+
 $(PROTOBUF) &: $(PROTOBUF_SOURCES) $(PROTOBUF_COMPILER)
 	@echo "\tPROTOBUF\t" $(PROTOBUF_FILENAMES)
 	@$(PROJECT_ROOT)/lib/nanopb/generator/nanopb_generator.py -q -I$(PROTOBUF_SOURCE_DIR) -D$(PROTOBUF_COMPILED_DIR) $(PROTOBUF_SOURCES)
 
+protobuf: $(PROTOBUF)
+
 clean:
 	@echo "\tCLEAN\t"
-	@$(RM) $(ASSETS)
+	@$(RM) $(ASSETS_COMPILED_DIR)/*
diff --git a/firmware/targets/f6/ble-glue/gap.c b/firmware/targets/f6/ble-glue/gap.c
index 73c8c0a7..eae5f87c 100644
--- a/firmware/targets/f6/ble-glue/gap.c
+++ b/firmware/targets/f6/ble-glue/gap.c
@@ -9,8 +9,6 @@
 #include "battery_service.h"
 #include "serial_service.h"
 
-#include <applications/bt/bt_service/bt.h>
-#include <applications/rpc/rpc.h>
 #include <furi-hal.h>
 
 #define GAP_TAG "BLE"
@@ -21,27 +19,26 @@
 #define BD_ADDR_SIZE_LOCAL 6
 
 typedef struct {
-  uint16_t gap_svc_handle;
-  uint16_t dev_name_char_handle;
-  uint16_t appearance_char_handle;
-  uint16_t connection_handle;
-  uint8_t adv_svc_uuid_len;
-  uint8_t adv_svc_uuid[20];
+    uint16_t gap_svc_handle;
+    uint16_t dev_name_char_handle;
+    uint16_t appearance_char_handle;
+    uint16_t connection_handle;
+    uint8_t adv_svc_uuid_len;
+    uint8_t adv_svc_uuid[20];
 } GapSvc;
 
 typedef struct {
-  GapSvc gap_svc;
-  GapState state;
-  osMutexId_t state_mutex;
-  uint8_t mac_address[BD_ADDR_SIZE_LOCAL];
-  Bt* bt;
-  Rpc* rpc;
-  RpcSession* rpc_session;
-  osTimerId advertise_timer;
-  osThreadAttr_t thread_attr;
-  osThreadId_t thread_id;
-  osMessageQueueId_t command_queue;
-  bool enable_adv;
+    GapSvc gap_svc;
+    GapState state;
+    osMutexId_t state_mutex;
+    uint8_t mac_address[BD_ADDR_SIZE_LOCAL];
+    BleEventCallback on_event_cb;
+    void* context;
+    osTimerId advertise_timer;
+    osThreadAttr_t thread_attr;
+    osThreadId_t thread_id;
+    osMessageQueueId_t command_queue;
+    bool enable_adv;
 } Gap;
 
 typedef enum {
@@ -84,14 +81,15 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
             if (disconnection_complete_event->Connection_Handle == gap->gap_svc.connection_handle) {
                 gap->gap_svc.connection_handle = 0;
                 gap->state = GapStateIdle;
-                FURI_LOG_I(GAP_TAG, "Disconnect from client. Close RPC session");
-                rpc_close_session(gap->rpc_session);
+                FURI_LOG_I(GAP_TAG, "Disconnect from client. Reason: %d", disconnection_complete_event->Reason);
             }
             if(gap->enable_adv) {
                 // Restart advertising
                 gap_start_advertising();
                 furi_hal_power_insomnia_exit();
             }
+            BleEvent event = {.type = BleEventTypeDisconnected};
+            gap->on_event_cb(event, gap->context);
         }
         break;
 
@@ -120,9 +118,7 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
                 case EVT_LE_CONN_COMPLETE:
                 furi_hal_power_insomnia_enter();
                 hci_le_connection_complete_event_rp0* connection_complete_event = (hci_le_connection_complete_event_rp0 *) meta_evt->data;
-                FURI_LOG_I(GAP_TAG, "Connection complete for connection handle 0x%x. Start RPC session", connection_complete_event->Connection_Handle);
-                gap->rpc_session = rpc_open_session(gap->rpc);
-                serial_svc_set_rpc_session(gap->rpc_session);
+                FURI_LOG_I(GAP_TAG, "Connection complete for connection handle 0x%x", connection_complete_event->Connection_Handle);
 
                 // Stop advertising as connection completed
                 osTimerStop(gap->advertise_timer);
@@ -155,7 +151,8 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
                 uint32_t pin = rand() % 999999;
                 aci_gap_pass_key_resp(gap->gap_svc.connection_handle, pin);
                 FURI_LOG_I(GAP_TAG, "Pass key request event. Pin: %d", pin);
-                bt_pin_code_show(gap->bt, pin);
+                BleEvent event = {.type = BleEventTypePinCodeShow, .data.pin_code = pin};
+                gap->on_event_cb(event, gap->context);
             }
                 break;
 
@@ -197,6 +194,8 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
                     aci_gap_terminate(gap->gap_svc.connection_handle, 5);
                 } else {
                     FURI_LOG_I(GAP_TAG, "Pairing complete");
+                    BleEvent event = {.type = BleEventTypeConnected};
+                    gap->on_event_cb(event, gap->context);
                 }
                 break;
 
@@ -211,11 +210,6 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
     return SVCCTL_UserEvtFlowEnable;
 }
 
-void SVCCTL_SvcInit() {
-    // Dummy function to prevent unused services initialization
-    // TODO refactor (disable all services in WPAN config)
-}
-
 static void set_advertisment_service_uid(uint8_t* uid, uint8_t uid_len) {
     gap->gap_svc.adv_svc_uuid_len = 1;
     if(uid_len == 2) {
@@ -263,7 +257,7 @@ static void gap_init_svc(Gap* gap) {
     tBleStatus status;
     uint32_t srd_bd_addr[2];
 
-    //HCI Reset to synchronise BLE Stack*/
+    // HCI Reset to synchronise BLE Stack
     hci_reset();
     // Configure mac address
     gap_init_mac_address(gap);
@@ -341,7 +335,8 @@ static void gap_advertise_start(GapState new_state)
         FURI_LOG_E(GAP_TAG, "Set discoverable err: %d", status);
     }
     gap->state = new_state;
-    bt_update_statusbar(gap->bt);
+    BleEvent event = {.type = BleEventTypeStartAdvertising};
+    gap->on_event_cb(event, gap->context);
     osTimerStart(gap->advertise_timer, INITIAL_ADV_TIMEOUT);
 }
 
@@ -355,17 +350,20 @@ static void gap_advertise_stop() {
         osTimerStop(gap->advertise_timer);
         aci_gap_set_non_discoverable();
         gap->state = GapStateIdle;
-        bt_update_statusbar(gap->bt);
     }
+    BleEvent event = {.type = BleEventTypeStopAdvertising};
+    gap->on_event_cb(event, gap->context);
 }
 
 void gap_start_advertising() {
+    FURI_LOG_I(GAP_TAG, "Start advertising");
     gap->enable_adv = true;
     GapCommand command = GapCommandAdvFast;
     furi_check(osMessageQueuePut(gap->command_queue, &command, 0, 0) == osOK);
 }
 
 void gap_stop_advertising() {
+    FURI_LOG_I(GAP_TAG, "Stop advertising");
     gap->enable_adv = false;
     GapCommand command = GapCommandAdvStop;
     furi_check(osMessageQueuePut(gap->command_queue, &command, 0, 0) == osOK);
@@ -376,16 +374,13 @@ static void gap_advetise_timer_callback(void* context) {
     furi_check(osMessageQueuePut(gap->command_queue, &command, 0, 0) == osOK);
 }
 
-bool gap_init() {
+bool gap_init(BleEventCallback on_event_cb, void* context) {
     if (APPE_Status() != BleGlueStatusStarted) {
         return false;
     }
 
     gap = furi_alloc(sizeof(Gap));
     srand(DWT->CYCCNT);
-    // Open records
-    gap->bt = furi_record_open("bt");
-    gap->rpc = furi_record_open("rpc");
     // Create advertising timer
     gap->advertise_timer = osTimerNew(gap_advetise_timer_callback, osTimerOnce, NULL, NULL);
     // Initialization of GATT & GAP layer
@@ -418,6 +413,10 @@ bool gap_init() {
     adv_service_uid[1] = 0x30;
 
     set_advertisment_service_uid(adv_service_uid, sizeof(adv_service_uid));
+
+    // Set callback
+    gap->on_event_cb = on_event_cb;
+    gap->context = context;
     return true;
 }
 
diff --git a/firmware/targets/f6/ble-glue/gap.h b/firmware/targets/f6/ble-glue/gap.h
index 93e75122..5b82cfec 100644
--- a/firmware/targets/f6/ble-glue/gap.h
+++ b/firmware/targets/f6/ble-glue/gap.h
@@ -1,11 +1,31 @@
 #pragma once
 
+#include <stdint.h>
 #include <stdbool.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+typedef enum {
+    BleEventTypeConnected,
+    BleEventTypeDisconnected,
+    BleEventTypeStartAdvertising,
+    BleEventTypeStopAdvertising,
+    BleEventTypePinCodeShow,
+} BleEventType;
+
+typedef union {
+    uint32_t pin_code;
+} BleEventData;
+
+typedef struct {
+    BleEventType type;
+    BleEventData data;
+} BleEvent;
+
+typedef void(*BleEventCallback) (BleEvent event, void* context);
+
 typedef enum {
     GapStateIdle,
     GapStateAdvFast,
@@ -13,7 +33,7 @@ typedef enum {
     GapStateConnected,
 } GapState;
 
-bool gap_init();
+bool gap_init(BleEventCallback on_event_cb, void* context);
 
 void gap_start_advertising();
 
diff --git a/firmware/targets/f6/ble-glue/serial_service.c b/firmware/targets/f6/ble-glue/serial_service.c
index a6f8e626..7de3529c 100644
--- a/firmware/targets/f6/ble-glue/serial_service.c
+++ b/firmware/targets/f6/ble-glue/serial_service.c
@@ -6,36 +6,20 @@
 
 #define SERIAL_SERVICE_TAG "serial service"
 
-#define SERIAL_SVC_DATA_LEN_MAX 245
-
 typedef struct {
     uint16_t svc_handle;
     uint16_t rx_char_handle;
     uint16_t tx_char_handle;
-    RpcSession* rpc_session;
-    osSemaphoreId_t rpc_sem;
+    SerialSvcDataReceivedCallback on_received_cb;
+    SerialSvcDataSentCallback on_sent_cb;
+    void* context;
 } SerialSvc;
 
 static SerialSvc* serial_svc;
 
 static const uint8_t service_uuid[] = {0x00, 0x00, 0xfe, 0x60, 0xcc, 0x7a, 0x48, 0x2a, 0x98, 0x4a, 0x7f, 0x2e, 0xd5, 0xb3, 0xe5, 0x8f};
-static const uint8_t char_rx_uuid[] = {0x00, 0x00, 0xfe, 0x61, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
-static const uint8_t char_tx_uuid[] = {0x00, 0x00, 0xfe, 0x62, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
-
-void serial_svc_rpc_send_bytes_callback(void* context, uint8_t* bytes, size_t bytes_len) {
-    size_t bytes_sent = 0;
-    while(bytes_sent < bytes_len) {
-        size_t bytes_remain = bytes_len - bytes_sent;
-        if(bytes_remain > SERIAL_SVC_DATA_LEN_MAX) {
-            serial_svc_update_rx(&bytes[bytes_sent], SERIAL_SVC_DATA_LEN_MAX);
-            bytes_sent += SERIAL_SVC_DATA_LEN_MAX;
-        } else {
-            serial_svc_update_rx(&bytes[bytes_sent], bytes_remain);
-            bytes_sent += bytes_remain;
-        }
-        osSemaphoreAcquire(serial_svc->rpc_sem, osWaitForever);
-    }
-}
+static const uint8_t char_rx_uuid[] = {0x00, 0x00, 0xfe, 0x62, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
+static const uint8_t char_tx_uuid[] = {0x00, 0x00, 0xfe, 0x61, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
 
 static SVCCTL_EvtAckStatus_t serial_svc_event_handler(void *event) {
     SVCCTL_EvtAckStatus_t ret = SVCCTL_EvtNotAck;
@@ -45,29 +29,31 @@ static SVCCTL_EvtAckStatus_t serial_svc_event_handler(void *event) {
     if(event_pckt->evt == HCI_VENDOR_SPECIFIC_DEBUG_EVT_CODE) {
         if(blecore_evt->ecode == ACI_GATT_ATTRIBUTE_MODIFIED_VSEVT_CODE) {
             attribute_modified = (aci_gatt_attribute_modified_event_rp0*)blecore_evt->data;
-            if(attribute_modified->Attr_Handle == serial_svc->tx_char_handle + 2) {
+            if(attribute_modified->Attr_Handle == serial_svc->rx_char_handle + 2) {
                 // Descriptor handle
                 ret = SVCCTL_EvtAckFlowEnable;
-                FURI_LOG_D(SERIAL_SERVICE_TAG, "TX descriptor event");
-            } else if(attribute_modified->Attr_Handle == serial_svc->tx_char_handle + 1) {
+                FURI_LOG_D(SERIAL_SERVICE_TAG, "RX descriptor event");
+            } else if(attribute_modified->Attr_Handle == serial_svc->rx_char_handle + 1) {
                 FURI_LOG_D(SERIAL_SERVICE_TAG, "Received %d bytes", attribute_modified->Attr_Data_Length);
-                rpc_feed_bytes(serial_svc->rpc_session, attribute_modified->Attr_Data, attribute_modified->Attr_Data_Length, 1000);
-                // serial_svc_update_rx(attribute_modified->Attr_Data, attribute_modified->Attr_Data_Length);
+                if(serial_svc->on_received_cb) {
+                    serial_svc->on_received_cb(attribute_modified->Attr_Data, attribute_modified->Attr_Data_Length, serial_svc->context);
+                }
                 ret = SVCCTL_EvtAckFlowEnable;
             }
         } else if(blecore_evt->ecode == ACI_GATT_SERVER_CONFIRMATION_VSEVT_CODE) {
-            osSemaphoreRelease(serial_svc->rpc_sem);
             FURI_LOG_D(SERIAL_SERVICE_TAG, "Ack received", blecore_evt->ecode);
+            if(serial_svc->on_sent_cb) {
+                serial_svc->on_sent_cb(serial_svc->context);
+            }
             ret = SVCCTL_EvtAckFlowEnable;
         }
     }
     return ret;
 }
 
-void serial_svc_start(Rpc* rpc) {
+void serial_svc_start() {
     tBleStatus status;
     serial_svc = furi_alloc(sizeof(SerialSvc));
-    serial_svc->rpc_sem = osSemaphoreNew(1, 0, NULL);
     // Register event handler
     SVCCTL_RegisterSvcHandler(serial_svc_event_handler);
 
@@ -77,33 +63,39 @@ void serial_svc_start(Rpc* rpc) {
         FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add Serial service: %d", status);
     }
 
-    // Add TX characteristics
-    status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_tx_uuid,
+    // Add RX characteristics
+    status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_rx_uuid,
                                 SERIAL_SVC_DATA_LEN_MAX,
                                 CHAR_PROP_WRITE_WITHOUT_RESP | CHAR_PROP_WRITE | CHAR_PROP_READ,
                                 ATTR_PERMISSION_AUTHEN_READ | ATTR_PERMISSION_AUTHEN_WRITE,
                                 GATT_NOTIFY_ATTRIBUTE_WRITE,
                                 10,
                                 CHAR_VALUE_LEN_VARIABLE,
-                                &serial_svc->tx_char_handle);
+                                &serial_svc->rx_char_handle);
     if(status) {
-        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add TX characteristic: %d", status);
+        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add RX characteristic: %d", status);
     }
 
-    // Add RX characteristic
-    status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_rx_uuid,
+    // Add TX characteristic
+    status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_tx_uuid,
                                 SERIAL_SVC_DATA_LEN_MAX,                                  
                                 CHAR_PROP_READ | CHAR_PROP_INDICATE,
                                 ATTR_PERMISSION_AUTHEN_READ,
                                 GATT_DONT_NOTIFY_EVENTS,
                                 10,
                                 CHAR_VALUE_LEN_VARIABLE,
-                                &serial_svc->rx_char_handle);
+                                &serial_svc->tx_char_handle);
     if(status) {
-        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add RX characteristic: %d", status);
+        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add TX characteristic: %d", status);
     }
 }
 
+void serial_svc_set_callbacks(SerialSvcDataReceivedCallback on_received_cb, SerialSvcDataSentCallback on_sent_cb, void* context) {
+    serial_svc->on_received_cb = on_received_cb;
+    serial_svc->on_sent_cb = on_sent_cb;
+    serial_svc->context = context;
+}
+
 void serial_svc_stop() {
     tBleStatus status;
     if(serial_svc) {
@@ -126,27 +118,18 @@ void serial_svc_stop() {
     }
 }
 
-void serial_svc_set_rpc_session(RpcSession* rpc_session) {
-    furi_assert(rpc_session);
-    // Set session
-    serial_svc->rpc_session = rpc_session;
-    // Set callback
-    rpc_set_send_bytes_callback(serial_svc->rpc_session, serial_svc_rpc_send_bytes_callback, NULL);
-}
-
-
-bool serial_svc_update_rx(uint8_t* data, uint8_t data_len) {
+bool serial_svc_update_tx(uint8_t* data, uint8_t data_len) {
     if(data_len > SERIAL_SVC_DATA_LEN_MAX) {
         return false;
     }
     FURI_LOG_D(SERIAL_SERVICE_TAG, "Updating char %d len", data_len);
     tBleStatus result = aci_gatt_update_char_value(serial_svc->svc_handle,
-                                        serial_svc->rx_char_handle,
+                                        serial_svc->tx_char_handle,
                                         0,
                                         data_len,
                                         data);
     if(result) {
-        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed updating RX characteristic: %d", result);
+        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed updating TX characteristic: %d", result);
     }
     return result != BLE_STATUS_SUCCESS;
 }
diff --git a/firmware/targets/f6/ble-glue/serial_service.h b/firmware/targets/f6/ble-glue/serial_service.h
index bdb924f8..b5a1c078 100644
--- a/firmware/targets/f6/ble-glue/serial_service.h
+++ b/firmware/targets/f6/ble-glue/serial_service.h
@@ -3,20 +3,22 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-#include <rpc/rpc.h>
-
+#define SERIAL_SVC_DATA_LEN_MAX (245)
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+typedef void(*SerialSvcDataReceivedCallback)(uint8_t* buff, uint16_t size, void* context);
+typedef void(*SerialSvcDataSentCallback)(void* context);
+
 void serial_svc_start();
 
-void serial_svc_set_rpc_session(RpcSession* rpc_session);
+void serial_svc_set_callbacks(SerialSvcDataReceivedCallback on_received_cb, SerialSvcDataSentCallback on_sent_cb, void* context);
 
 void serial_svc_stop();
 
-bool serial_svc_update_rx(uint8_t* data, uint8_t data_len);
+bool serial_svc_update_tx(uint8_t* data, uint8_t data_len);
 
 #ifdef __cplusplus
 }
diff --git a/firmware/targets/f6/furi-hal/furi-hal-bt.c b/firmware/targets/f6/furi-hal/furi-hal-bt.c
index 01f4b919..97db87c7 100644
--- a/firmware/targets/f6/furi-hal/furi-hal-bt.c
+++ b/firmware/targets/f6/furi-hal/furi-hal-bt.c
@@ -4,7 +4,8 @@
 #include <stm32wbxx.h>
 #include <shci.h>
 #include <cmsis_os2.h>
-#include <gap.h>
+
+#include <furi.h>
 
 void furi_hal_bt_init() {
     // Explicitly tell that we are in charge of CLK48 domain
@@ -13,8 +14,9 @@ void furi_hal_bt_init() {
     APPE_Init();
 }
 
-bool furi_hal_bt_init_app() {
-    return gap_init();
+bool furi_hal_bt_init_app(BleEventCallback event_cb, void* context) {
+    furi_assert(event_cb);
+    return gap_init(event_cb, context);
 }
 
 void furi_hal_bt_start_advertising() {
@@ -32,6 +34,17 @@ void furi_hal_bt_stop_advertising() {
     }
 }
 
+void furi_hal_bt_set_data_event_callbacks(SerialSvcDataReceivedCallback on_received_cb, SerialSvcDataSentCallback on_sent_cb, void* context) {
+    serial_svc_set_callbacks(on_received_cb, on_sent_cb, context);
+}
+
+bool furi_hal_bt_tx(uint8_t* data, uint16_t size) {
+    if(size > FURI_HAL_BT_PACKET_SIZE_MAX) {
+        return false;
+    }
+    return serial_svc_update_tx(data, size);
+}
+
 void furi_hal_bt_dump_state(string_t buffer) {
     BleGlueStatus status = APPE_Status();
     if (status == BleGlueStatusStarted) {
diff --git a/firmware/targets/f7/ble-glue/gap.c b/firmware/targets/f7/ble-glue/gap.c
index 73c8c0a7..eae5f87c 100644
--- a/firmware/targets/f7/ble-glue/gap.c
+++ b/firmware/targets/f7/ble-glue/gap.c
@@ -9,8 +9,6 @@
 #include "battery_service.h"
 #include "serial_service.h"
 
-#include <applications/bt/bt_service/bt.h>
-#include <applications/rpc/rpc.h>
 #include <furi-hal.h>
 
 #define GAP_TAG "BLE"
@@ -21,27 +19,26 @@
 #define BD_ADDR_SIZE_LOCAL 6
 
 typedef struct {
-  uint16_t gap_svc_handle;
-  uint16_t dev_name_char_handle;
-  uint16_t appearance_char_handle;
-  uint16_t connection_handle;
-  uint8_t adv_svc_uuid_len;
-  uint8_t adv_svc_uuid[20];
+    uint16_t gap_svc_handle;
+    uint16_t dev_name_char_handle;
+    uint16_t appearance_char_handle;
+    uint16_t connection_handle;
+    uint8_t adv_svc_uuid_len;
+    uint8_t adv_svc_uuid[20];
 } GapSvc;
 
 typedef struct {
-  GapSvc gap_svc;
-  GapState state;
-  osMutexId_t state_mutex;
-  uint8_t mac_address[BD_ADDR_SIZE_LOCAL];
-  Bt* bt;
-  Rpc* rpc;
-  RpcSession* rpc_session;
-  osTimerId advertise_timer;
-  osThreadAttr_t thread_attr;
-  osThreadId_t thread_id;
-  osMessageQueueId_t command_queue;
-  bool enable_adv;
+    GapSvc gap_svc;
+    GapState state;
+    osMutexId_t state_mutex;
+    uint8_t mac_address[BD_ADDR_SIZE_LOCAL];
+    BleEventCallback on_event_cb;
+    void* context;
+    osTimerId advertise_timer;
+    osThreadAttr_t thread_attr;
+    osThreadId_t thread_id;
+    osMessageQueueId_t command_queue;
+    bool enable_adv;
 } Gap;
 
 typedef enum {
@@ -84,14 +81,15 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
             if (disconnection_complete_event->Connection_Handle == gap->gap_svc.connection_handle) {
                 gap->gap_svc.connection_handle = 0;
                 gap->state = GapStateIdle;
-                FURI_LOG_I(GAP_TAG, "Disconnect from client. Close RPC session");
-                rpc_close_session(gap->rpc_session);
+                FURI_LOG_I(GAP_TAG, "Disconnect from client. Reason: %d", disconnection_complete_event->Reason);
             }
             if(gap->enable_adv) {
                 // Restart advertising
                 gap_start_advertising();
                 furi_hal_power_insomnia_exit();
             }
+            BleEvent event = {.type = BleEventTypeDisconnected};
+            gap->on_event_cb(event, gap->context);
         }
         break;
 
@@ -120,9 +118,7 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
                 case EVT_LE_CONN_COMPLETE:
                 furi_hal_power_insomnia_enter();
                 hci_le_connection_complete_event_rp0* connection_complete_event = (hci_le_connection_complete_event_rp0 *) meta_evt->data;
-                FURI_LOG_I(GAP_TAG, "Connection complete for connection handle 0x%x. Start RPC session", connection_complete_event->Connection_Handle);
-                gap->rpc_session = rpc_open_session(gap->rpc);
-                serial_svc_set_rpc_session(gap->rpc_session);
+                FURI_LOG_I(GAP_TAG, "Connection complete for connection handle 0x%x", connection_complete_event->Connection_Handle);
 
                 // Stop advertising as connection completed
                 osTimerStop(gap->advertise_timer);
@@ -155,7 +151,8 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
                 uint32_t pin = rand() % 999999;
                 aci_gap_pass_key_resp(gap->gap_svc.connection_handle, pin);
                 FURI_LOG_I(GAP_TAG, "Pass key request event. Pin: %d", pin);
-                bt_pin_code_show(gap->bt, pin);
+                BleEvent event = {.type = BleEventTypePinCodeShow, .data.pin_code = pin};
+                gap->on_event_cb(event, gap->context);
             }
                 break;
 
@@ -197,6 +194,8 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
                     aci_gap_terminate(gap->gap_svc.connection_handle, 5);
                 } else {
                     FURI_LOG_I(GAP_TAG, "Pairing complete");
+                    BleEvent event = {.type = BleEventTypeConnected};
+                    gap->on_event_cb(event, gap->context);
                 }
                 break;
 
@@ -211,11 +210,6 @@ SVCCTL_UserEvtFlowStatus_t SVCCTL_App_Notification( void *pckt )
     return SVCCTL_UserEvtFlowEnable;
 }
 
-void SVCCTL_SvcInit() {
-    // Dummy function to prevent unused services initialization
-    // TODO refactor (disable all services in WPAN config)
-}
-
 static void set_advertisment_service_uid(uint8_t* uid, uint8_t uid_len) {
     gap->gap_svc.adv_svc_uuid_len = 1;
     if(uid_len == 2) {
@@ -263,7 +257,7 @@ static void gap_init_svc(Gap* gap) {
     tBleStatus status;
     uint32_t srd_bd_addr[2];
 
-    //HCI Reset to synchronise BLE Stack*/
+    // HCI Reset to synchronise BLE Stack
     hci_reset();
     // Configure mac address
     gap_init_mac_address(gap);
@@ -341,7 +335,8 @@ static void gap_advertise_start(GapState new_state)
         FURI_LOG_E(GAP_TAG, "Set discoverable err: %d", status);
     }
     gap->state = new_state;
-    bt_update_statusbar(gap->bt);
+    BleEvent event = {.type = BleEventTypeStartAdvertising};
+    gap->on_event_cb(event, gap->context);
     osTimerStart(gap->advertise_timer, INITIAL_ADV_TIMEOUT);
 }
 
@@ -355,17 +350,20 @@ static void gap_advertise_stop() {
         osTimerStop(gap->advertise_timer);
         aci_gap_set_non_discoverable();
         gap->state = GapStateIdle;
-        bt_update_statusbar(gap->bt);
     }
+    BleEvent event = {.type = BleEventTypeStopAdvertising};
+    gap->on_event_cb(event, gap->context);
 }
 
 void gap_start_advertising() {
+    FURI_LOG_I(GAP_TAG, "Start advertising");
     gap->enable_adv = true;
     GapCommand command = GapCommandAdvFast;
     furi_check(osMessageQueuePut(gap->command_queue, &command, 0, 0) == osOK);
 }
 
 void gap_stop_advertising() {
+    FURI_LOG_I(GAP_TAG, "Stop advertising");
     gap->enable_adv = false;
     GapCommand command = GapCommandAdvStop;
     furi_check(osMessageQueuePut(gap->command_queue, &command, 0, 0) == osOK);
@@ -376,16 +374,13 @@ static void gap_advetise_timer_callback(void* context) {
     furi_check(osMessageQueuePut(gap->command_queue, &command, 0, 0) == osOK);
 }
 
-bool gap_init() {
+bool gap_init(BleEventCallback on_event_cb, void* context) {
     if (APPE_Status() != BleGlueStatusStarted) {
         return false;
     }
 
     gap = furi_alloc(sizeof(Gap));
     srand(DWT->CYCCNT);
-    // Open records
-    gap->bt = furi_record_open("bt");
-    gap->rpc = furi_record_open("rpc");
     // Create advertising timer
     gap->advertise_timer = osTimerNew(gap_advetise_timer_callback, osTimerOnce, NULL, NULL);
     // Initialization of GATT & GAP layer
@@ -418,6 +413,10 @@ bool gap_init() {
     adv_service_uid[1] = 0x30;
 
     set_advertisment_service_uid(adv_service_uid, sizeof(adv_service_uid));
+
+    // Set callback
+    gap->on_event_cb = on_event_cb;
+    gap->context = context;
     return true;
 }
 
diff --git a/firmware/targets/f7/ble-glue/gap.h b/firmware/targets/f7/ble-glue/gap.h
index 93e75122..5b82cfec 100644
--- a/firmware/targets/f7/ble-glue/gap.h
+++ b/firmware/targets/f7/ble-glue/gap.h
@@ -1,11 +1,31 @@
 #pragma once
 
+#include <stdint.h>
 #include <stdbool.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+typedef enum {
+    BleEventTypeConnected,
+    BleEventTypeDisconnected,
+    BleEventTypeStartAdvertising,
+    BleEventTypeStopAdvertising,
+    BleEventTypePinCodeShow,
+} BleEventType;
+
+typedef union {
+    uint32_t pin_code;
+} BleEventData;
+
+typedef struct {
+    BleEventType type;
+    BleEventData data;
+} BleEvent;
+
+typedef void(*BleEventCallback) (BleEvent event, void* context);
+
 typedef enum {
     GapStateIdle,
     GapStateAdvFast,
@@ -13,7 +33,7 @@ typedef enum {
     GapStateConnected,
 } GapState;
 
-bool gap_init();
+bool gap_init(BleEventCallback on_event_cb, void* context);
 
 void gap_start_advertising();
 
diff --git a/firmware/targets/f7/ble-glue/serial_service.c b/firmware/targets/f7/ble-glue/serial_service.c
index a6f8e626..7de3529c 100644
--- a/firmware/targets/f7/ble-glue/serial_service.c
+++ b/firmware/targets/f7/ble-glue/serial_service.c
@@ -6,36 +6,20 @@
 
 #define SERIAL_SERVICE_TAG "serial service"
 
-#define SERIAL_SVC_DATA_LEN_MAX 245
-
 typedef struct {
     uint16_t svc_handle;
     uint16_t rx_char_handle;
     uint16_t tx_char_handle;
-    RpcSession* rpc_session;
-    osSemaphoreId_t rpc_sem;
+    SerialSvcDataReceivedCallback on_received_cb;
+    SerialSvcDataSentCallback on_sent_cb;
+    void* context;
 } SerialSvc;
 
 static SerialSvc* serial_svc;
 
 static const uint8_t service_uuid[] = {0x00, 0x00, 0xfe, 0x60, 0xcc, 0x7a, 0x48, 0x2a, 0x98, 0x4a, 0x7f, 0x2e, 0xd5, 0xb3, 0xe5, 0x8f};
-static const uint8_t char_rx_uuid[] = {0x00, 0x00, 0xfe, 0x61, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
-static const uint8_t char_tx_uuid[] = {0x00, 0x00, 0xfe, 0x62, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
-
-void serial_svc_rpc_send_bytes_callback(void* context, uint8_t* bytes, size_t bytes_len) {
-    size_t bytes_sent = 0;
-    while(bytes_sent < bytes_len) {
-        size_t bytes_remain = bytes_len - bytes_sent;
-        if(bytes_remain > SERIAL_SVC_DATA_LEN_MAX) {
-            serial_svc_update_rx(&bytes[bytes_sent], SERIAL_SVC_DATA_LEN_MAX);
-            bytes_sent += SERIAL_SVC_DATA_LEN_MAX;
-        } else {
-            serial_svc_update_rx(&bytes[bytes_sent], bytes_remain);
-            bytes_sent += bytes_remain;
-        }
-        osSemaphoreAcquire(serial_svc->rpc_sem, osWaitForever);
-    }
-}
+static const uint8_t char_rx_uuid[] = {0x00, 0x00, 0xfe, 0x62, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
+static const uint8_t char_tx_uuid[] = {0x00, 0x00, 0xfe, 0x61, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
 
 static SVCCTL_EvtAckStatus_t serial_svc_event_handler(void *event) {
     SVCCTL_EvtAckStatus_t ret = SVCCTL_EvtNotAck;
@@ -45,29 +29,31 @@ static SVCCTL_EvtAckStatus_t serial_svc_event_handler(void *event) {
     if(event_pckt->evt == HCI_VENDOR_SPECIFIC_DEBUG_EVT_CODE) {
         if(blecore_evt->ecode == ACI_GATT_ATTRIBUTE_MODIFIED_VSEVT_CODE) {
             attribute_modified = (aci_gatt_attribute_modified_event_rp0*)blecore_evt->data;
-            if(attribute_modified->Attr_Handle == serial_svc->tx_char_handle + 2) {
+            if(attribute_modified->Attr_Handle == serial_svc->rx_char_handle + 2) {
                 // Descriptor handle
                 ret = SVCCTL_EvtAckFlowEnable;
-                FURI_LOG_D(SERIAL_SERVICE_TAG, "TX descriptor event");
-            } else if(attribute_modified->Attr_Handle == serial_svc->tx_char_handle + 1) {
+                FURI_LOG_D(SERIAL_SERVICE_TAG, "RX descriptor event");
+            } else if(attribute_modified->Attr_Handle == serial_svc->rx_char_handle + 1) {
                 FURI_LOG_D(SERIAL_SERVICE_TAG, "Received %d bytes", attribute_modified->Attr_Data_Length);
-                rpc_feed_bytes(serial_svc->rpc_session, attribute_modified->Attr_Data, attribute_modified->Attr_Data_Length, 1000);
-                // serial_svc_update_rx(attribute_modified->Attr_Data, attribute_modified->Attr_Data_Length);
+                if(serial_svc->on_received_cb) {
+                    serial_svc->on_received_cb(attribute_modified->Attr_Data, attribute_modified->Attr_Data_Length, serial_svc->context);
+                }
                 ret = SVCCTL_EvtAckFlowEnable;
             }
         } else if(blecore_evt->ecode == ACI_GATT_SERVER_CONFIRMATION_VSEVT_CODE) {
-            osSemaphoreRelease(serial_svc->rpc_sem);
             FURI_LOG_D(SERIAL_SERVICE_TAG, "Ack received", blecore_evt->ecode);
+            if(serial_svc->on_sent_cb) {
+                serial_svc->on_sent_cb(serial_svc->context);
+            }
             ret = SVCCTL_EvtAckFlowEnable;
         }
     }
     return ret;
 }
 
-void serial_svc_start(Rpc* rpc) {
+void serial_svc_start() {
     tBleStatus status;
     serial_svc = furi_alloc(sizeof(SerialSvc));
-    serial_svc->rpc_sem = osSemaphoreNew(1, 0, NULL);
     // Register event handler
     SVCCTL_RegisterSvcHandler(serial_svc_event_handler);
 
@@ -77,33 +63,39 @@ void serial_svc_start(Rpc* rpc) {
         FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add Serial service: %d", status);
     }
 
-    // Add TX characteristics
-    status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_tx_uuid,
+    // Add RX characteristics
+    status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_rx_uuid,
                                 SERIAL_SVC_DATA_LEN_MAX,
                                 CHAR_PROP_WRITE_WITHOUT_RESP | CHAR_PROP_WRITE | CHAR_PROP_READ,
                                 ATTR_PERMISSION_AUTHEN_READ | ATTR_PERMISSION_AUTHEN_WRITE,
                                 GATT_NOTIFY_ATTRIBUTE_WRITE,
                                 10,
                                 CHAR_VALUE_LEN_VARIABLE,
-                                &serial_svc->tx_char_handle);
+                                &serial_svc->rx_char_handle);
     if(status) {
-        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add TX characteristic: %d", status);
+        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add RX characteristic: %d", status);
     }
 
-    // Add RX characteristic
-    status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_rx_uuid,
+    // Add TX characteristic
+    status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_tx_uuid,
                                 SERIAL_SVC_DATA_LEN_MAX,                                  
                                 CHAR_PROP_READ | CHAR_PROP_INDICATE,
                                 ATTR_PERMISSION_AUTHEN_READ,
                                 GATT_DONT_NOTIFY_EVENTS,
                                 10,
                                 CHAR_VALUE_LEN_VARIABLE,
-                                &serial_svc->rx_char_handle);
+                                &serial_svc->tx_char_handle);
     if(status) {
-        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add RX characteristic: %d", status);
+        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add TX characteristic: %d", status);
     }
 }
 
+void serial_svc_set_callbacks(SerialSvcDataReceivedCallback on_received_cb, SerialSvcDataSentCallback on_sent_cb, void* context) {
+    serial_svc->on_received_cb = on_received_cb;
+    serial_svc->on_sent_cb = on_sent_cb;
+    serial_svc->context = context;
+}
+
 void serial_svc_stop() {
     tBleStatus status;
     if(serial_svc) {
@@ -126,27 +118,18 @@ void serial_svc_stop() {
     }
 }
 
-void serial_svc_set_rpc_session(RpcSession* rpc_session) {
-    furi_assert(rpc_session);
-    // Set session
-    serial_svc->rpc_session = rpc_session;
-    // Set callback
-    rpc_set_send_bytes_callback(serial_svc->rpc_session, serial_svc_rpc_send_bytes_callback, NULL);
-}
-
-
-bool serial_svc_update_rx(uint8_t* data, uint8_t data_len) {
+bool serial_svc_update_tx(uint8_t* data, uint8_t data_len) {
     if(data_len > SERIAL_SVC_DATA_LEN_MAX) {
         return false;
     }
     FURI_LOG_D(SERIAL_SERVICE_TAG, "Updating char %d len", data_len);
     tBleStatus result = aci_gatt_update_char_value(serial_svc->svc_handle,
-                                        serial_svc->rx_char_handle,
+                                        serial_svc->tx_char_handle,
                                         0,
                                         data_len,
                                         data);
     if(result) {
-        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed updating RX characteristic: %d", result);
+        FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed updating TX characteristic: %d", result);
     }
     return result != BLE_STATUS_SUCCESS;
 }
diff --git a/firmware/targets/f7/ble-glue/serial_service.h b/firmware/targets/f7/ble-glue/serial_service.h
index bdb924f8..b5a1c078 100644
--- a/firmware/targets/f7/ble-glue/serial_service.h
+++ b/firmware/targets/f7/ble-glue/serial_service.h
@@ -3,20 +3,22 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-#include <rpc/rpc.h>
-
+#define SERIAL_SVC_DATA_LEN_MAX (245)
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+typedef void(*SerialSvcDataReceivedCallback)(uint8_t* buff, uint16_t size, void* context);
+typedef void(*SerialSvcDataSentCallback)(void* context);
+
 void serial_svc_start();
 
-void serial_svc_set_rpc_session(RpcSession* rpc_session);
+void serial_svc_set_callbacks(SerialSvcDataReceivedCallback on_received_cb, SerialSvcDataSentCallback on_sent_cb, void* context);
 
 void serial_svc_stop();
 
-bool serial_svc_update_rx(uint8_t* data, uint8_t data_len);
+bool serial_svc_update_tx(uint8_t* data, uint8_t data_len);
 
 #ifdef __cplusplus
 }
diff --git a/firmware/targets/f7/furi-hal/furi-hal-bt.c b/firmware/targets/f7/furi-hal/furi-hal-bt.c
index 01f4b919..97db87c7 100644
--- a/firmware/targets/f7/furi-hal/furi-hal-bt.c
+++ b/firmware/targets/f7/furi-hal/furi-hal-bt.c
@@ -4,7 +4,8 @@
 #include <stm32wbxx.h>
 #include <shci.h>
 #include <cmsis_os2.h>
-#include <gap.h>
+
+#include <furi.h>
 
 void furi_hal_bt_init() {
     // Explicitly tell that we are in charge of CLK48 domain
@@ -13,8 +14,9 @@ void furi_hal_bt_init() {
     APPE_Init();
 }
 
-bool furi_hal_bt_init_app() {
-    return gap_init();
+bool furi_hal_bt_init_app(BleEventCallback event_cb, void* context) {
+    furi_assert(event_cb);
+    return gap_init(event_cb, context);
 }
 
 void furi_hal_bt_start_advertising() {
@@ -32,6 +34,17 @@ void furi_hal_bt_stop_advertising() {
     }
 }
 
+void furi_hal_bt_set_data_event_callbacks(SerialSvcDataReceivedCallback on_received_cb, SerialSvcDataSentCallback on_sent_cb, void* context) {
+    serial_svc_set_callbacks(on_received_cb, on_sent_cb, context);
+}
+
+bool furi_hal_bt_tx(uint8_t* data, uint16_t size) {
+    if(size > FURI_HAL_BT_PACKET_SIZE_MAX) {
+        return false;
+    }
+    return serial_svc_update_tx(data, size);
+}
+
 void furi_hal_bt_dump_state(string_t buffer) {
     BleGlueStatus status = APPE_Status();
     if (status == BleGlueStatusStarted) {
diff --git a/firmware/targets/furi-hal-include/furi-hal-bt.h b/firmware/targets/furi-hal-include/furi-hal-bt.h
index 89fab715..fe9a6de9 100644
--- a/firmware/targets/furi-hal-include/furi-hal-bt.h
+++ b/firmware/targets/furi-hal-include/furi-hal-bt.h
@@ -7,6 +7,10 @@
 
 #include <m-string.h>
 #include <stdbool.h>
+#include <gap.h>
+#include <serial_service.h>
+
+#define FURI_HAL_BT_PACKET_SIZE_MAX SERIAL_SVC_DATA_LEN_MAX
 
 #ifdef __cplusplus
 extern "C" {
@@ -17,10 +21,10 @@ extern "C" {
 void furi_hal_bt_init();
 
 /** Start BLE app
- *
- * @return     true if app inited
- */
-bool furi_hal_bt_init_app();
+ * @param event_cb - BleEventCallback instance
+ * @param context - pointer to context
+*/
+bool furi_hal_bt_init_app(BleEventCallback event_cb, void* context);
 
 /** Start advertising
  */
@@ -48,10 +52,20 @@ void furi_hal_bt_dump_state(string_t buffer);
  */
 bool furi_hal_bt_is_alive();
 
-/** Wait for Core2 startup
- *
- * @return     true if success, otherwise timeouted
+/** Set data event callbacks
+ * @param on_received_cb - SerialSvcDataReceivedCallback instance
+ * @param on_sent_cb - SerialSvcDataSentCallback instance
+ * @param context - pointer to context
  */
+void furi_hal_bt_set_data_event_callbacks(SerialSvcDataReceivedCallback on_received_cb, SerialSvcDataSentCallback on_sent_cb, void* context);
+
+/** Send data through BLE
+ * @param data - data buffer
+ * @param size - data buffer size
+ */
+bool furi_hal_bt_tx(uint8_t* data, uint16_t size);
+
+/** Wait for Core2 startup */
 bool furi_hal_bt_wait_startup();
 
 /** Lock shared access to flash controller