Matter Refrigerator and Temperature Controlled Example#

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

[Matter Refrigerator and Temperature Controlled Example](#matter-refrigerator-and-Temperature -controlled-example)

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 Github

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 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

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 in the Silicon Labs Matter Github Repo
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

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 in the Assets section of the Releases page on Silabs Matter Github .

Viewing Logging Output#

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).

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
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
```

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 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 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 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

Cold Cabinet Endpoint Id 2
Freeze 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

For the description of Software Update process with SiWx917 example applications see SiWx917 OTA Software Update

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

Matter Refrigerator and Temperature Controlled Example

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