diff --git a/port/wiced/btstack_config.h b/port/wiced/btstack_config.h
index 85a15c623..f9c731fe2 100644
--- a/port/wiced/btstack_config.h
+++ b/port/wiced/btstack_config.h
@@ -12,7 +12,7 @@
 // BTstack features that can be enabled
 #define ENABLE_BLE
 #define ENABLE_CLASSIC
-#define ENABLE_LE_SECURE_CONNECTIONS
+// #define ENABLE_LE_SECURE_CONNECTIONS
 #define ENABLE_LOG_ERROR
 #define ENABLE_LOG_INFO
 
diff --git a/port/wiced/main.c b/port/wiced/main.c
index 2fa4667f2..53e850378 100644
--- a/port/wiced/main.c
+++ b/port/wiced/main.c
@@ -79,10 +79,10 @@ void application_start(void){
     btstack_run_loop_init(btstack_run_loop_wiced_get_instance());
     
     // enable full log output while porting
-    // hci_dump_open(NULL, HCI_DUMP_STDOUT);
+    hci_dump_open(NULL, HCI_DUMP_STDOUT);
 
     // init HCI
-    hci_init(hci_transport_h4_instance(btstack_uart_block_embedded_instance()), (void*) &hci_transport_config_uart);
+    hci_init(hci_transport_h4_instance(NULL), (void*) &hci_transport_config_uart);
     hci_set_link_key_db(btstack_link_key_db_memory_instance());
     hci_set_chipset(btstack_chipset_bcm_instance());
 
diff --git a/port/wiced/readme.md b/port/wiced/readme.md
index 37cd71fb9..00ad89afd 100644
--- a/port/wiced/readme.md
+++ b/port/wiced/readme.md
@@ -1,6 +1,8 @@
 # BTstack port for WICED platform
 
-To integrate BTstack into the WICED SDK, please move the BTstack project into WICED-SDK-X/libraries.
+WICED SDK 3.5.2 or higher required. With RedBear Duo, please follow their installation guide for WICED SDK first.
+
+To integrate BTstack into the WICED SDK, please move the BTstack project into WICED-SDK-3.5.2/libraries.
 Then create projects for BTstack examples in WICED/apps/btstack by running:
 
 	./create_examples.py
@@ -21,7 +23,7 @@ The maximal baud rate is limited to 3 mbps.
 
 The port uses the generated WIFI address plus 1 as Bluetooth MAC address.
 
-The examples that implement a BLE Peripheral/provide a GATT Server use the GATT DB in the .gatt file.
+The examples that implement a BLE Peripheral/provide a GATT Server that uses the GATT DB in the .gatt file.
 After modifying the .gatt file, please run ./update_gatt_db.sh in the apps/btstack/$(EXAMPLE) folder.
 
 
diff --git a/port/wiced/wiced.mk b/port/wiced/wiced.mk
index 817b56f53..8bcc1e077 100644
--- a/port/wiced/wiced.mk
+++ b/port/wiced/wiced.mk
@@ -24,6 +24,7 @@ $(NAME)_SOURCES += \
 	../../src/classic/sdp_client.c        \
 	../../src/classic/sdp_client_rfcomm.c  \
 	../../src/classic/sdp_util.c          \
+	../../src/classic/spp_server.c        \
 	../../src/btstack_linked_list.c       \
 	../../src/btstack_memory.c            \
 	../../src/btstack_memory_pool.c       \
@@ -39,7 +40,6 @@ $(NAME)_SOURCES += \
 $(NAME)_SOURCES += \
 	main.c                                     \
 	btstack_run_loop_wiced.c                   \
-	btstack_uart_block_embedded.c  			   \
 	hci_transport_h4_wiced.c                   \
 	../../chipset/bcm/btstack_chipset_bcm.c    \
-	../../../drivers/bluetooth/firmware/$(BT_CHIP)$(BT_CHIP_REVISION)/bt_firmware_image.c \
+	../../../drivers/bluetooth/firmware/$(BT_CHIP)$(BT_CHIP_REVISION)/$(BT_CHIP_XTAL_FREQUENCY)/bt_firmware_image.c \