# Matter Refrigerator and Temperature Controlled Example

An example showing the use of CHIP on the Silicon Labs EFR32 MG24 and SiWx917
Wi-Fi Boards.

<hr>

-   [Matter Refrigerator and Temperature Controlled Example](#matter-refrigerator-and-temperature-controlled-example)
    -   [Introduction](#introduction)
    -   [Building](#building)
    -   [Flashing the Application](#flashing-the-application)
    -   [Viewing Logging Output](#viewing-logging-output)
        -   [SEGGER RTT](#segger-rtt)
        -   [Console Log](#console-log)
            -   [Configuring the VCOM](#configuring-the-vcom)
        -   [Using the console](#using-the-console)
    -   [Running the Complete Example](#running-the-complete-example)
    -   [Trigger events from Matter CLI](#trigger-events-from-matter-cli)
        -   [Notes](#notes)
    -   [OTA Software Update](#ota-software-update)
    -   [Building options](#building-options)
        -   [Disabling logging](#disabling-logging)
        -   [Debug build / release build](#debug-build--release-build)
        -   [Disabling LCD](#disabling-lcd)
        -   [KVS maximum entry count](#kvs-maximum-entry-count)

<hr>

> **NOTE:** Silicon Laboratories now maintains a public matter GitHub repo with
> frequent releases thoroughly tested and validated. Developers looking to
> develop matter products with silabs hardware are encouraged to use our latest
> release with added tools and documentation.
> [Silabs matter_sdk Github](https://github.com/SiliconLabsSoftware/matter_sdk/tags)

## Introduction

The Refrigerator and Temperature Controlled example provides a baseline
demonstration of a Temperature Controlled Cabinet device, built using Matter and
the Silicon Labs Simplicity SDK. It can be controlled by a Chip controller over
an Openthread or Wi-Fi network.

The Refrigerator device can be commissioned over Bluetooth Low Energy (BLE),
where the device and the Chip controller will exchange security information
using the Rendez-vous procedure. For Thread, the Thread Network credentials are
provided to the Refrigerator device, which will then join the Thread network.

If the LCD is enabled, the LCD on the Silabs WSTK displays a QR Code containing
the needed commissioning information for the BLE connection and starting the
Rendez-vous procedure. Once the device is commissioned, the display shows a
representation of the refrigerator's temperature-controlled state.

The Refrigerator and Temperature Controlled example is intended to serve both as
a means to explore the workings of Matter as well as a template for creating
real products based on the Silicon Labs platform.

## Building

-   Download the
    [Simplicity Commander](https://www.silabs.com/mcu/programming-options)
    command line tool, and ensure that `commander` is your shell search path.
    (For Mac OS X, `commander` is located inside
    `Commander.app/Contents/MacOS/`.)

-   Download and install a suitable ARM gcc tool chain (For most Host, the
    bootstrap already installs the toolchain):
    [GNU Arm Embedded Toolchain 12.2 Rel1](https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads)

-   Install some additional tools(likely already present for CHIP developers):

             # Linux
             $ sudo apt-get install git ninja-build

             # Mac OS X
             $ brew install ninja

-   Supported hardware:

    -   > For the latest supported hardware please refer to the
        > [Hardware Requirements](https://docs.silabs.com/matter/latest/matter-prerequisites/hardware-requirements)
        > in the Silicon Labs Matter Documentation

    Silabs boards :

    -   BRD2601B / SLWSTK6000B / Wireless Starter Kit / 2.4GHz@10dBm
    -   BRD2703A / SLWSTK6000B / Wireless Starter Kit / 2.4GHz@10dBm
    -   BRD4186A / SLWSTK6006A / Wireless Starter Kit / 2.4GHz@10dBm
    -   BRD4186C / SLWSTK6006A / Wireless Starter Kit / 2.4GHz@10dBm
    -   BRD4187A / SLWSTK6006A / Wireless Starter Kit / 2.4GHz@20dBm
    -   BRD4187C / SLWSTK6006A / Wireless Starter Kit / 2.4GHz@20dBm
    -   BRD4338A / SLWSTK6006A / Wireless Starter Kit / 2.4GHz@20dBm
    -   BRD4346A / SLWSTK6006A / Wireless Starter Kit / 2.4GHz@20dBm

*   Region code Setting (917 WiFi projects)

    -   In Wifi configurations, the region code can be set in this
        [file](https://github.com/project-chip/connectedhomeip/blob/85e9d5fd42071d52fa3940238739544fd2a3f717/src/platform/silabs/wifi/SiWx/WifiInterfaceImpl.cpp#L104).
        The available region codes can be found
        [here](https://github.com/SiliconLabs/wiseconnect/blob/f675628eefa1ac4990e94146abb75dd08b522571/components/device/silabs/si91x/wireless/inc/sl_si91x_types.h#L71)

*   Build the example application:

            cd ~/connectedhomeip
            ./scripts/examples/gn_silabs_example.sh ./examples/refrigerator-app/silabs/ ./out/refrigerator-app BRD4187C

-   To delete generated executable, libraries and object files use:

            $ cd ~/connectedhomeip
            $ rm -rf ./out/

    OR use GN/Ninja directly

            $ cd ~/connectedhomeip/examples/refrigerator-app/silabs
            $ git submodule update --init
            $ source third_party/connectedhomeip/scripts/activate.sh
            $ export SILABS_BOARD=BRD4187C
            $ gn gen out/debug
            $ ninja -C out/debug

-   To delete generated executable, libraries and object files use:

            $ cd ~/connectedhomeip/examples/refrigerator-app/silabs
            $ rm -rf out/

*   Build the example as Intermittently Connected Device (ICD)

            $ ./scripts/examples/gn_silabs_example.sh ./examples/refrigerator-app/silabs/ ./out/refrigerator-app_ICD BRD4187C --icd

    or use gn as previously mentioned but adding the following arguments:

            $ gn gen out/debug '--args=SILABS_BOARD="BRD4187C" enable_sleepy_device=true chip_openthread_ftd=false'

*   Build the example with pigweed RCP

            $ ./scripts/examples/gn_silabs_example.sh examples/refrigerator-app/silabs/ out/refrigerator_app_rpc BRD4187C 'import("//with_pw_rpc.gni")'

    or use GN/Ninja Directly

            $ cd ~/connectedhomeip/examples/refrigerator-app/silabs
            $ git submodule update --init
            $ source third_party/connectedhomeip/scripts/activate.sh
            $ export SILABS_BOARD=BRD4187C
            $ gn gen out/debug --args='import("//with_pw_rpc.gni")'
            $ ninja -C out/debug

For more build options, help is provided when running the build script without
arguments

         ./scripts/examples/gn_silabs_example.sh

## Flashing the Application

-   On the command line:

            $ cd ~/connectedhomeip/examples/refrigerator-app/silabs
            $ python3 out/debug/matter-silabs-refrigerator-example.flash.py

-   Or with the Ozone debugger, just load the .out file.

All EFR32 boards require a bootloader, see Silicon Labs documentation for more
info. Pre-built bootloader binaries are available on the
[Matter Software Artifacts page](https://docs.silabs.com/matter/latest/matter-prerequisites/matter-artifacts#matter-bootloader-binaries).

## Viewing Logging Output

### SEGGER RTT

The example application is built to use the SEGGER Real Time Transfer (RTT)
facility for log output. RTT is a feature built-in to the J-Link Interface MCU
on the WSTK development board. It allows bi-directional communication with an
embedded application without the need for a dedicated UART.

Using the RTT facility requires downloading and installing the _SEGGER J-Link
Software and Documentation Pack_
([web site](https://www.segger.com/downloads/jlink#J-LinkSoftwareAndDocumentationPack)).

Alternatively, SEGGER Ozone J-Link debugger can be used to view RTT logs too
after flashing the .out file.

-   Download the J-Link installer by navigating to the appropriate URL and
    agreeing to the license agreement.

-   [JLink_Linux_x86_64.deb](https://www.segger.com/downloads/jlink/JLink_Linux_x86_64.deb)
-   [JLink_MacOSX.pkg](https://www.segger.com/downloads/jlink/JLink_MacOSX.pkg)

*   Install the J-Link software

            $ cd ~/Downloads
            $ sudo dpkg -i JLink_Linux_V*_x86_64.deb

*   In Linux, grant the logged in user the ability to talk to the development
    hardware via the linux tty device (/dev/ttyACMx) by adding them to the
    dialout group.

            $ sudo usermod -a -G dialout ${USER}

Once the above is complete, log output can be viewed using the JLinkExe tool in
combination with JLinkRTTClient as follows:

-   Run the JLinkExe tool with arguments to autoconnect to the WSTK board:

    For MG24 use:

            ```
            $ JLinkExe -device EFR32MG24AXXXF1536 -if SWD -speed 4000 -autoconnect 1
            ```

-   In a second terminal, run the JLinkRTTClient to view logs:

            $ JLinkRTTClient

### Console Log

If the binary was built with this option or if you're using the Siwx917 WiFi
SoC, the logs and the CLI (if enabled) will be available on the serial console.

This console required a baudrate of **115200** with CTS/RTS. This is the default
configuration of Silicon Labs dev kits.

**HOWEVER** the console will required a baudrate of **921600** with CTS/RTS if
the verbose mode is selected (--verbose)

#### Configuring the VCOM

-   Using (Simplicity
    Studio)[https://community.silabs.com/s/article/wstk-virtual-com-port-baudrate-setting?language=en_US]
-   Using commander-cli
    ```
    commander vcom config --baudrate 921600 --handshake rtscts
    ```

### Using the console

With any serial terminal application such as screen, putty, minicom etc.

## Running the Complete Example

-   It is assumed here that you already have an OpenThread border router
    configured and running. If not see the following guide
    [Openthread_border_router](../../../platforms/openthread/openthread_border_router_pi.md)
    for more information on how to setup a border router on a raspberryPi.

    Take note that the RCP code is available directly through
    [Simplicity Studio 5](https://www.silabs.com/products/development-tools/software/simplicity-studio/simplicity-studio-5)
    under File->New->Project Wizard->Examples->Thread : ot-rcp

-   User interface : **LCD** The LCD on Silabs WSTK shows a QR Code. This QR
    Code is be scanned by the CHIP Tool app For the Rendez-vous procedure over
    BLE

          * On devices that do not have or support the LCD Display like the BRD4166A Thunderboard Sense 2,
            a URL can be found in the RTT logs.

            <info  > [SVR] Copy/paste the below URL in a browser to see the QR Code:
            <info  > [SVR] https://project-chip.github.io/connectedhomeip/qrcode.html?data=CH%3AI34NM%20-00%200C9SS0

    **LED 0** shows the overall state of the device and its connectivity. The
    following states are possible:

          -   _Short Flash On (50 ms on/950 ms off)_ ; The device is in the
              unprovisioned (unpaired) state and is waiting for a commissioning
              application to connect.

          -   _Rapid Even Flashing_ ; (100 ms on/100 ms off)_ &mdash; The device is in the
              unprovisioned state and a commissioning application is connected through
              Bluetooth LE.

          -   _Short Flash Off_ ; (950ms on/50ms off)_ &mdash; The device is fully
              provisioned, but does not yet have full Thread network or service
              connectivity.

          -   _Solid On_ ; The device is fully provisioned and has full Thread
              network and service connectivity.

    **LED 1** Shows the state of the refrigerator and temperature controlled
    cabinet

          -   temperature ; No implementation is present. this feature will be available in a future update.
          -   _Off_ ; No implementation is present. this feature will be available in a future update.
          -   _Blinking slowly_ ; No implementation is present. this feature will be available in a future update.
          -   _Blinking quickly_ ; No implementation is present. this feature will be available in a future update.

    **Push Button 0** Function button and factory reset

          -   Pressed and release: No implementation is present. this feature will be available in a future update.

          -   Pressed and hold for 6 s: Initiates the factory reset of the device.
              Releasing the button within the 6-second window cancels the factory reset
              procedure. **LEDs** blink in unison when the factory reset procedure is
              initiated.

    **Push Button 1** Application button

          -   Pressed and release: No implementation is present. this feature will be available in a future update.

          -   Press and hold for 3 s: No implementation is present. this feature will be available in a future update.

*   Once the device is provisioned, it will join the Thread network is
    established, look for the RTT log

    ```
        [DL] Device Role: CHILD
        [DL] Partition Id:0x6A7491B7
        [DL] \_OnPlatformEvent default: event->Type = 32778
        [DL] OpenThread State Changed (Flags: 0x00000001)
        [DL] Thread Unicast Addresses:
        [DL]    2001:DB8::E1A2:87F1:7D5D:FECA/64 valid preferred
        [DL]    FDDE:AD00:BEEF::FF:FE00:2402/64 valid preferred rloc
        [DL]    FDDE:AD00:BEEF:0:383F:5E81:A05A:B168/64 valid preferred
        [DL]    FE80::D8F2:592E:C109:CF00/64 valid preferred
        [DL] LwIP Thread interface addresses updated
        [DL] FE80::D8F2:592E:C109:CF00 IPv6 link-local address, preferred)
        [DL] FDDE:AD00:BEEF:0:383F:5E81:A05A:B168 Thread mesh-local address, preferred)
        [DL] 2001:DB8::E1A2:87F1:7D5D:FECA IPv6 global unicast address, preferred)
    ```

    (you can verify that the device is on the thread network with the command
    `router table` using a serial terminal (screen / minicom etc.) on the board
    running the refrigerator-app example. You can also get the address list with
    the command ipaddr again in the serial terminal )

    You can provision the Chip device using Chip tool Android or iOS app or
    through CLI commands on your OT BR

    The
    [CHIPTool](https://github.com/project-chip/connectedhomeip/blob/master/examples/chip-tool/README.md)
    can now be used to send ZCL commands to the refrigerator device. For
    instance, to set the refrigerator covering lift by percentage:

    ```
    chip-tool pairing ble-thread 1 hex:<operationalDataset> 20202021 3840

    ./chip-tool refrigeratoralarm read state 1 1

    Refrigerator Endpoint Id 1

    This enpoint support the refrigerator alarm cluster

    ./chip-tool temperaturecontrol read temperature-setpoint 1 2

    Enpoint for temperaturecontrol is 2 and 3

    Freeze Cabinet Endpoint Id 2
    Cold Cabinet Endpoint Id 3

    This enpoint support Temperature control cluster
    ```

    To see the supported refrigerator cluster commands, use:

    ```
    chip-tool refrigeratorandtemperaturecontrolledcabinetmode
    chip-tool temperaturecontrol
    ```

    Subscribe refrigeratoralarm events

    ```
    chip-tool interactive start
    refrigeratoralarm subscribe-event notify 1 10 1 1
    ```

## Trigger events from Matter CLI

**door-state-change**

-   Trigger refrigeratoralarm door-state-change event:

    ```
    -> matterCli> refrigeratoralarm event door-state-change open
    -> Done
    ```

### Notes

-   Depending on your network settings your router might not provide native ipv6
    addresses to your devices (Border router / PC). If this is the case, you
    need to add a static ipv6 addresses on both device and then an ipv6 route to
    the border router on your PC

            # On Border Router :
            $ sudo ip addr add dev <Network interface> 2002::2/64

            # On PC (Linux) :
            $ sudo ip addr add dev <Network interface> 2002::1/64

            # Add Ipv6 route on PC (Linux)
            $ sudo ip route add <Thread global ipv6 prefix>/64 via 2002::2

## OTA Software Update

For the description of Software Update process with EFR32 example applications
see
[EFR32 OTA Software Update](../../../platforms/silabs/silabs_efr32_software_update.md)

For the description of Software Update process with SiWx917 example applications
see
[SiWx917 OTA Software Update](https://docs.silabs.com/matter/latest/matter-ota/04-ota-software-update-soc)

## Building options

All of Silabs's examples within the Matter repo have all the features enabled by
default, as to provide the best end user experience. However some of those
features can easily be toggled on or off. Here is a short list of options :

### Disabling logging

chip_progress_logging, chip_detail_logging, chip_automation_logging

    $ ./scripts/examples/gn_silabs_example.sh ./examples/refrigerator-app/silabs ./out/refrigerator-app BRD4164A "chip_detail_logging=false chip_automation_logging=false chip_progress_logging=false"

### Debug build / release build

is_debug

    $ ./scripts/examples/gn_silabs_example.sh ./examples/refrigerator-app/silabs ./out/refrigerator-app BRD4164A "is_debug=false"

### Disabling LCD

show_qr_code

    $ ./scripts/examples/gn_silabs_example.sh ./examples/refrigerator-app/silabs ./out/refrigerator-app BRD4164A "show_qr_code=false"

### KVS maximum entry count

kvs_max_entries

    Set the maximum Kvs entries that can be stored in NVM (Default 75)
    Thresholds: 30 <= kvs_max_entries <= 255

    $ ./scripts/examples/gn_silabs_example.sh ./examples/refrigerator-app/silabs ./out/refrigerator-app BRD4164A kvs_max_entries=50