Matter Genio Light Switch Example#

An example showing the use of Matter on the MediaTek Genio MT793X.

Introduction#

The Genio (MT793X) light switch example provides a baseline demonstration of a on-off light switch device, built using Matter and the MediaTek Genio SDK. It can be controlled by a Chip controller over Wi-Fi network..

The Genio device can be commissioned over Bluetooth Low Energy where the device and the Chip controller will exchange security information with the Rendez-vous procedure. Network credentials are then provided to the Genio device which will then join the network.

The light switch 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 MediaTek platform.

Building#

  • Following the Linux related descriptions in Build Matter to prepare the build environment.

  • Supported hardware:

    Genio 130A (MT7931) board:

    • EK-AI7931LD KIT

  • Build the example application:

      `cd ~/connectedhomeip`
  `./scripts/examples/gn_genio_example.sh ./examples/light-switch-app/genio` `./out/light-switch-app`

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

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

    OR use GN/Ninja directly

      `$ cd ~/connectedhomeip/examples/light-switch-app/genio`
  `$ git submodule update --init`
  `$ source third_party/connectedhomeip/scripts/activate.sh`
  `$ gn gen out/debug`
  `$ ninja -C out/debug`

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

      `$ cd ~/connectedhomeip/examples/light-switch-app/genio`
  `$ rm -rf out/`

Flashing the Application#

  • Copy the GUI based Flash Tool. from the Linux Host that the example was build to a Windows PC.

    Flash Tool can be found in this source tree under this directory

    third_party/mt793x_sdk/filogic/flash_tool

  • On the Windows PC, run the Flash Tool

    1. Select the scatter.ini file in the ./out/light-switch-app directory.

    2. Follow the instruction that comes with EK-AI7931LD KIT to switch the kit to download mode.

    3. Click Download on FLASH TOOL.

Running the Complete Example#

  • This example needs one lighting-app device and one light-switch-app device.

  • You can provision and control the Chip device using the python controller, Chip tool standalone, Android or iOS app

    [CHIP Tool]](https://github.com/project-chip/connectedhomeip/blob/master/docs/guides/chip_tool_guide.md)

  • First of all, you have to commission with the light-switch-app (nodeID 1) and the lighting-app (nodeID 2) with the CHIP tool by following commands.

      chip-tool pairing ble-wifi 1 my-ap myappassword 20202021 3840

  chip-tool pairing ble-wifi 2 my-ap myappassword 20202021 3840

  • Next, you have to configure the ACL in the lighting-app device to allow access from switch device and chip-tool, and binding the lighting-app device to the light-switch-app device by following commands.

      chip-tool accesscontrol write acl '[{"fabricIndex": 1, "privilege": 5, "authMode": 2, "subjects": [112233], "targets": null },{"fabricIndex": 1, "privilege": 5, "authMode": 2, "subjects": [1], "targets": null }]' 2 0

  chip-tool binding write binding '[{"fabricIndex": 1, "node":2, "endpoint":1, "cluster":6}]' 1 1

  • Once all setup successfully, you can control the lighting-app device through the Matter Shell on the light-switch-app device.

       > switch onoff on
   > switch onoff off

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