CHIP Ameba Light Switch Example

This example demonstrates Matter Light-Switch application on Ameba platform.

CHIP Ameba Light Switch Example

Supported Device

The CHIP demo application is supported on Ameba RTL8722DM Board.

Building the Example Application

Pull docker image:

  $ docker pull ghcr.io/project-chip/chip-build-ameba:35

Run docker container:

  $ docker run -it -v ${CHIP_DIR}:/root/chip ghcr.io/project-chip/chip-build-ameba:35

Setup build environment:
```
  $ source ./scripts/bootstrap.sh
```
To build the demo application:
```
  $ ./scripts/build/build_examples.py --target ameba-amebad-light-switch build
```
The output image files are stored in out/ameba-amebad-light-switch/asdk/image folder.
The bootloader image files are stored in out/ameba-amebad-light-switch/asdk/bootloader folder.
After building the application, Ameba Image Tool is used to flash it to Ameba board.

Connect your device via USB and open Ameba Image Tool.
Select correct serial port and set baudrate as 115200.
Browse and add the corresponding image files in the Flash Download list to the correct locations
Click Download button.

Commissioning

There are two commissioning modes supported by Ameba platform:

BLE mode

Build and Flash
The light-switch example will run automatically after booting the Ameba board.
Test with Chip-Tool

IP mode

Build and Flash
The light-switch example will run automatically after booting the Ameba board.
Connect to AP using ATW0, ATW1, ATWC commands
Test with Chip-Tool

Cluster Control

After successful commissioning, use the OnOff cluster command to control the OnOff attribute. This allows you to toggle a parameter implemented by the device to be On or Off.

Via Chip-Tool

  $ ./chip-tool onoff on <nodeID> 1
  $ ./chip-tool onoff off <nodeID> 1

Running RPC Console

Connect a USB-TTL adapter as shown below

For AmebaD

    Ameba         USB-TTL
    A19           TX
    A18           RX
    GND           GND

For AmebaZ2

    Ameba         USB-TTL
    A13           TX
    A14           RX
    GND           GND

Build the chip-rpc console
As part of building the example with RPCs enabled the chip_rpc python interactive console is installed into your venv. The python wheel files are also created in the output folder: out/debug/chip_rpc_console_wheels. To install the wheel files without rebuilding:
```
    $ pip3 install out/debug/chip_rpc_console_wheels/*.whl
```

Launch the chip-rpc console after resetting Ameba board

    $ chip-console --device /dev/tty<port connected to USB-TTL adapter> -b 115200

Get and Set lighting directly using the RPC console

    python
    rpcs.chip.rpc.Lighting.Get()
    rpcs.chip.rpc.Lighting.Set(on=True, level=128, color=protos.chip.rpc.LightingColor(hue=5, saturation=5))

Running Matter Shell

Matter Shell is enabled whenever RPC is disabled.
RPC console and Matter Shell cannot be enabled at the same time as they use the same UART port.
Connect Ameba to the USB-TTL adapter as shown in the RPC section.
Open the USB-TTL serial port and type help to view the available commands

Binding and Controlling a Lighting Device

This example shows how to bind a Switch Device to a Lighting Device and control it through the Matter Shell. One binding client (Switch Device) and one binding server (Lighting Device) is required.

Commission the switch (nodeID 1) and lighting device (nodeID 2) using chip-tool.

      $ ./chip-tool pairing ble-wifi 1 <SSID> <PASSWORD> 20202021 3840
      $ ./chip-tool pairing ble-wifi 2 <SSID> <PASSWORD> 20202021 3840

After successful commissioning, configure the ACL in the lighting device to allow access from switch device and chip-tool.

      $ ./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

Bind the lighting device to the switch device.

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

Control the lighting device through the switch device's Matter Shell
```
      > switch onoff on
      > switch onoff off
```