diff --git a/platform/posix/btstack_uart_block.h b/platform/posix/btstack_uart_block.h
new file mode 100644
index 000000000..16e314f5b
--- /dev/null
+++ b/platform/posix/btstack_uart_block.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2016 BlueKitchen GmbH
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ * 4. Any redistribution, use, or modification is done solely for
+ *    personal benefit and not for any commercial purpose or for
+ *    monetary gain.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
+ * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Please inquire about commercial licensing options at 
+ * contact@bluekitchen-gmbh.com
+ *
+ */
+
+/*
+ *  btstack_uart_posix.h
+ *
+ *  Common code to access serial port via POSIX interface
+ *  Used by hci_transport_h4_posix.c and hci_transport_h5.posix
+ *
+ */
+
+#ifndef __BTSTACK_UART_BLOCK_H
+#define __BTSTACK_UART_BLOCK_H
+
+#include <stdint.h>
+#include "hci_transport.h"
+
+typedef struct {
+    /**
+     * init transport
+     * @param transport_config
+     */
+    int (*init)(const hci_transport_config_uart_t * config);
+
+    /**
+     * open transport connection
+     */
+    int (*open)(void);
+
+    /**
+     * close transport connection
+     */
+    int (*close)(void);
+
+    /**
+     * set callback for block received
+     */
+    void (*set_block_received)(void (*block_handler)(void));
+
+    /**
+     * set callback for sent
+     */
+    void (*set_block_sent)(void (*block_handler)(void));
+
+    /**
+     * set baudrate
+     */
+    int (*set_baudrate)(uint32_t baudrate);
+
+    /**
+     * set parity
+     */
+    int  (*set_parity)(int parity);
+
+    /**
+     * receive block
+     */
+    void (*receive_block)(uint8_t *buffer, uint16_t len);
+
+    /**
+     * send block
+     */
+    void (*send_block)(const uint8_t *buffer, uint16_t length);
+
+    // void hal_uart_dma_set_sleep(uint8_t sleep);
+    // void hal_uart_dma_set_csr_irq_handler( void (*csr_irq_handler)(void));
+
+} btstack_uart_block_t;
+
+#endif
diff --git a/platform/posix/hci_transport_h5_posix.c b/platform/posix/hci_transport_h5_posix.c
index 5d4d2f0a3..89a1b8c02 100644
--- a/platform/posix/hci_transport_h5_posix.c
+++ b/platform/posix/hci_transport_h5_posix.c
@@ -54,7 +54,7 @@
 #include "btstack_debug.h"
 #include "hci_transport.h"
 #include "btstack_uart_posix.h"
-
+#include "btstack_uart_block.h"
 
 #ifdef HAVE_EHCILL
 #error "HCI Transport H5 POSIX does not support eHCILL. Please either use HAVE_EHCILL or H5 Transport"
@@ -79,59 +79,6 @@ typedef enum {
     HCI_TRANSPORT_LINK_SEND_ACK_PACKET      = 1 << 7,
 } hci_transport_link_actions_t;
 
-typedef struct {
-    /**
-     * init transport
-     * @param transport_config
-     */
-    int (*init)(const hci_transport_config_uart_t * config);
-
-    /**
-     * open transport connection
-     */
-    int (*open)(void);
-
-    /**
-     * close transport connection
-     */
-    int (*close)(void);
-
-    /**
-     * set callback for block received
-     */
-    void (*set_block_received)(void (*block_handler)(void));
-
-    /**
-     * set callback for sent
-     */
-    void (*set_block_sent)(void (*block_handler)(void));
-
-    /**
-     * set baudrate
-     */
-    int (*set_baudrate)(uint32_t baudrate);
-
-    /**
-     * set parity
-     */
-    int  (*set_parity)(int parity);
-
-    /**
-     * receive block
-     */
-    void (*receive_block)(uint8_t *buffer, uint16_t len);
-
-    /**
-     * send block
-     */
-    void (*send_block)(const uint8_t *buffer, uint16_t length);
-
-    // void hal_uart_dma_set_sleep(uint8_t sleep);
-
-    // void hal_uart_dma_set_csr_irq_handler( void (*csr_irq_handler)(void));
-
-} btstack_uart_block_t;
-
 // Configuration Field. No packet buffers -> sliding window = 1, no OOF flow control, no data integrity check
 #define LINK_CONFIG_SLIDING_WINDOW_SIZE 1
 #define LINK_CONFIG_OOF_FLOW_CONTROL 0