diff --git a/Makefile b/Makefile
index acb13cb..bf49b2d 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,8 @@ MODULE_OBJS :=
 include config.mk
 
 # example: include a folder
-DIR := $(SRC_DIR)/interfaces
+DIR := $(SRC_DIR)/imu_interface
+# interfaces
 include $(DIR)/rules.mk
 
 mkobjdir:
diff --git a/src/imu_interface/location.exe b/src/imu_interface/location.exe
deleted file mode 100644
index 68a10b3..0000000
Binary files a/src/imu_interface/location.exe and /dev/null differ
diff --git a/src/imu_interface/rules.mk b/src/imu_interface/rules.mk
index c2d6b1c..7998538 100644
--- a/src/imu_interface/rules.mk
+++ b/src/imu_interface/rules.mk
@@ -5,6 +5,8 @@ include submodule.general.mk
 build_$(DIR):
 	$(CXX) $(CXXFLAGS) -I $(INCLUDE_DIRS) -c $(DIR)/RealIntelCam.cpp -o $(OBJS_DIR)/RealIntelCam.o
 clean_$(DIR):
+	rm imu_interface_test_binary
 test_$(DIR):
 	@echo testing the module $(DIR)!
-test_sample_submodule: test_$(DIR)
\ No newline at end of file
+build_imu_interface_test_binary:
+	$(CXX) $(CXXFLAGS) -I $(INCLUDE_DIRS) $(DIR)/measure.cpp -o imu_interface_test_binary -lrealsense2
\ No newline at end of file
diff --git a/src/lidar/sl_serial_channel.cpp b/src/lidar/sl_serial_channel.cpp
new file mode 100644
index 0000000..f7faf3c
--- /dev/null
+++ b/src/lidar/sl_serial_channel.cpp
@@ -0,0 +1,146 @@
+/*
+ * Slamtec LIDAR SDK
+ *
+ *  Copyright (c) 2014 - 2020 Shanghai Slamtec Co., Ltd.
+ *  http://www.slamtec.com
+ *
+ */
+ /*
+  * 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.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT HOLDER 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.
+  *
+  */
+
+#include "sl_lidar_driver.h"
+#include "hal/abs_rxtx.h"
+#include "hal/socket.h"
+
+
+namespace sl {
+    
+    class SerialPortChannel : public ISerialPortChannel
+    {
+    public:
+        SerialPortChannel(const std::string& device, int baudrate) :_rxtxSerial(rp::hal::serial_rxtx::CreateRxTx())
+        {
+            _device = device;
+            _baudrate = baudrate;
+        }
+
+        ~SerialPortChannel()
+        {
+            if (_rxtxSerial)
+                delete _rxtxSerial;
+        }
+
+        bool bind(const std::string& device, sl_s32 baudrate)
+        {
+            _closePending = false;
+            return _rxtxSerial->bind(device.c_str(), baudrate);
+        }
+
+        bool open()
+        {
+            if(!bind(_device, _baudrate))
+                return false;
+            return _rxtxSerial->open();
+        }
+
+        void close()
+        {
+            _closePending = true;
+            _rxtxSerial->cancelOperation();
+            _rxtxSerial->close();
+        }
+        void flush()
+        {
+            _rxtxSerial->flush(0);
+        }
+
+        sl_result waitForDataExt(size_t& size_hint, sl_u32 timeoutInMs)
+        {
+            _word_size_t result;
+            size_t size_holder;
+            size_hint = 0;
+
+            if (_closePending) return  RESULT_OPERATION_TIMEOUT;
+
+            if (!_rxtxSerial->isOpened()) {
+                return RESULT_OPERATION_FAIL;
+            }
+
+            result = _rxtxSerial->waitfordata(1, timeoutInMs, &size_holder);
+            size_hint = size_holder;
+            if (result == (_word_size_t)rp::hal::serial_rxtx::ANS_DEV_ERR)
+                return RESULT_OPERATION_FAIL;
+            if (result == (_word_size_t)rp::hal::serial_rxtx::ANS_TIMEOUT)
+                return RESULT_OPERATION_TIMEOUT;
+
+            return RESULT_OK;
+        }
+
+        bool waitForData(size_t size, sl_u32 timeoutInMs, size_t* actualReady)
+        {
+            if (_closePending) return false;
+            return (_rxtxSerial->waitfordata(size, timeoutInMs, actualReady) == rp::hal::serial_rxtx::ANS_OK);
+        }
+
+        int write(const void* data, size_t size)
+        {
+           return _rxtxSerial->senddata((const sl_u8 * )data, size);
+        }
+
+        int read(void* buffer, size_t size)
+        {
+            size_t lenRec = 0;
+            lenRec = _rxtxSerial->recvdata((sl_u8 *)buffer, size);
+            return (int)lenRec;
+        }
+
+        void clearReadCache()
+        {
+           
+        }
+
+        void setDTR(bool dtr)
+        {
+            dtr ? _rxtxSerial->setDTR() : _rxtxSerial->clearDTR();
+        }
+
+        int getChannelType() {
+            return CHANNEL_TYPE_SERIALPORT;
+        }
+
+    private:
+        rp::hal::serial_rxtx  * _rxtxSerial;
+        bool _closePending;
+        std::string _device;
+        int _baudrate;
+
+    };
+
+    Result<IChannel*> createSerialPortChannel(const std::string& device, int baudrate)
+    {
+        return new  SerialPortChannel(device, baudrate);
+    }
+
+}
\ No newline at end of file