doc: update external link for release/v1.4

Author: Kwang-Hui

README.md

@@ -4,7 +4,7 @@
 
 Direct-connected devices connect directly to the SmartThings cloud. The SDK for Direct Connected Devices is equipped to manage all MQTT topics and onboarding requirements, freeing you to focus on the actions and attributes of your device. To facilitate the development of device application in an original chipset SDK, the core device library and the examples were separated into two git repositories. That is, if you want to use the core device library in your original chipset SDK that installed before, you may simply link it to develop a device application in your existing development environment.
 
-It is distributed in source form and written in C99 for the purpose of portability to most platforms. If you want to know the overall workflow of using this SDK, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md).
+It is distributed in source form and written in C99 for the purpose of portability to most platforms. If you want to know the overall workflow of using this SDK, please refer to the [Getting Started](./doc/getting_started.md).
 
 ## Directory layout
 
@@ -13,7 +13,7 @@ The reference git is delivered via the following directory structure :
 - `apps` : sample device applications for each chipset
 - `bsp` : An original chipset vendor's SDK is located.  If you use a chipset that has already been ported, this vendor's SDK can be easily downloaded as a submodule in this directory through the predefined script(e.g. `setup.py`).
 - `doc` : documents
-- `iot-core` : [IoT core device library](https://github.com/SmartThingsCommunity/st-device-sdk-c). It can also be downloaded as a submodule in this directory through the predefined script(e.g. `setup.py`).
+- `iot-core` : [IoT core device library](https://github.com/SmartThingsCommunity/st-device-sdk-c/tree/release/v1.4). It can also be downloaded as a submodule in this directory through the predefined script(e.g. `setup.py`).
 - `output` : build outputs will be placed
 - `patches` : patches to be applied in the original chipset vendor's SDK for resolving some problems
 - `tools` : scripts to be applied for each chipset
@@ -61,7 +61,7 @@ Basically, this release builds on the environments of chipset vendor's SDKs.
    - And then, run the `setup.py` to automatically download submodules to the `bsp` directory. At this time, the IoT core device library is also downloaded to the `iot-core` directory.
      ```sh
      $ cd ~
-     $ git clone https://github.com/SmartThingsCommunity/st-device-sdk-c-ref.git
+     $ git clone https://github.com/SmartThingsCommunity/st-device-sdk-c-ref.git -b release/v1.4
      $ cd st-device-sdk-c-ref
      $ python setup.py
      Usage: python setup.py [BSP_NAME]

apps/emw3166/light_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

apps/emw3166/switch_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

apps/esp32/light_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

apps/esp32/switch_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

apps/rtl8195/light_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

apps/rtl8195/switch_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

apps/rtl8720c/switch_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

apps/rtl8721c/light_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

apps/rtl8721c/switch_example/README.md

@@ -6,7 +6,7 @@ SmartThings direct-connected device is Wi-Fi enabled device that uses the SmartT
 
 ## Getting started
 
-For information on detailed workflow, please refer to the [Getting Started](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/blob/master/doc/getting_started.md)
+For information on detailed workflow, please refer to the [Getting Started](../../../doc/getting_started.md)
 
 ## Components and Capabilities
 

doc/getting_started.md

@@ -25,18 +25,18 @@ The first thing you need to do is set up your programming environment.
 
 There are two git repositories for working with the _SmartThings SDK for Direct Connected Devices_. The first git repository is for the Internet of Things (IoT) core device library itself, while the second git repository is for sample device applications that use this IoT core device library on the chipset vendor's own SDK.
 
-- [IoT Core Device Library](https://github.com/SmartThingsCommunity/st-device-sdk-c)
-- [Reference](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref)
+- [IoT Core Device Library](https://github.com/SmartThingsCommunity/st-device-sdk-c/tree/release/v1.4)
+- [Reference](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/tree/release/v1.4)
 
 #### Download Reference
 
-You can just choose to download the [Reference repository](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref) from GitHub, if you use a chipset that has already been ported. In this case, the `IoT Core Device Library` and `a chipset SDK` can be easily downloaded as submodules in this Reference repository through the predefined `setup.py` script. If you are new for using the _SmartThings SDK for Direct Connected Devices_, we recommend you to use the [Reference repository](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref) for easier understanding.
+You can just choose to download the [Reference repository](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/tree/release/v1.4) from GitHub, if you use a chipset that has already been ported. In this case, the `IoT Core Device Library` and `a chipset SDK` can be easily downloaded as submodules in this Reference repository through the predefined `setup.py` script. If you are new for using the _SmartThings SDK for Direct Connected Devices_, we recommend you to use the [Reference repository](https://github.com/SmartThingsCommunity/st-device-sdk-c-ref/tree/release/v1.4) for easier understanding.
 
 From the terminal, navigate to the directory you want the _SmartThings SDK for Direct Connected Devices_ to locate (e.g. `~/`) and clone it using the following git command:
 
 ```sh
 $ cd ~
-$ git clone https://github.com/SmartThingsCommunity/st-device-sdk-c-ref.git
+$ git clone https://github.com/SmartThingsCommunity/st-device-sdk-c-ref.git -b release/v1.4
 ```
 
 > **Note** :
@@ -320,7 +320,7 @@ Your IoT device needs two pieces of information when connecting to the SmartThin
        }
      }
      ```
-     This file can be generated by [stdk-keygen.py](https://github.com/SmartThingsCommunity/st-device-sdk-c/tree/master/tools/keygen#individual) like below example.
+     This file can be generated by [stdk-keygen.py](https://github.com/SmartThingsCommunity/st-device-sdk-c/tree/release/v1.4/tools/keygen#individual) like below example.
      ```sh
      python3 stdk-keygen.py --firmware switch_example_ver001 --mnid fJXX
      ```
@@ -338,7 +338,7 @@ Your IoT device needs two pieces of information when connecting to the SmartThin
      In this case other sercurity information like device private key, device public key and device serial number should be moved to dedicated secure partition - called as SmartThings Non-Volatile (STNV) Partition - with `CONFIG_STDK_IOT_CORE_SUPPORT_STNV_PARTITION` option enabled.  
      This is subitable for manufacturing because it could have dedicated secure partition for immutable information. SmartThings Device SDK expect security information from STNV parition with below path name.
      The mapping between `iot_nvd_t` and real storage path name can be found at `iot_bsp_nv_data_XXX.c` for [each bsp's porting layer](https://github.com/SmartThingsCommunity/st-device-sdk-c/tree/master/src/port/bsp).  
-     [stdk-keygen.py](https://github.com/SmartThingsCommunity/st-device-sdk-c/tree/master/tools/keygen#commercial) also supports batch creation by reading csv formatted series of device serial number.
+     [stdk-keygen.py](https://github.com/SmartThingsCommunity/st-device-sdk-c/tree/release/v1.4/tools/keygen#commercial) also supports batch creation by reading csv formatted series of device serial number.
 
      | Data Path     | Description                   | Examples                 |
      | :------------ | :---------------------------- | :----------------------- |