# Matter `MCXW71` Contact Sensor Example Application For generic information related to contact sensor application, please see the [common README](../README.md). - [Matter `MCXW71` Contact Sensor Example Application](#matter-mcxw71-contact-sensor-example-application) - [Introduction](#introduction) - [Device UI](#device-ui) - [Building](#building) - [Flashing](#flashing) - [Flashing the `NBU` image](#flashing-the-nbu-image) - [Flashing the host image](#flashing-the-host-image) - [Debugging](#debugging) - [OTA](#ota) ## Introduction This is a contact sensor application implemented for an `mcxw71` device. The following board was used when testing this Matter reference app for an `mcxw71` device: ![FRDM-MCXW71](../../../platform/nxp/mcxw71_k32w1/doc/images/frdm-mcxw71.jpg) ## Device UI The state feedback is provided through LED effects: | widget | effect | description | | ------- | ----------------------------------- | ----------------------------------------------------------------------------------------------------- | | LED2 | short flash on (50ms on/950ms off) | The device is in an unprovisioned (unpaired) state and is waiting for a commissioner to connect. | | LED2 | rapid even flashing (100ms period) | The device is in an unprovisioned state and a commissioner is connected via BLE. | | LED2 | short flash off (950ms on/50ms off) | The device is fully provisioned, but does not yet have full network (Thread) or service connectivity. | | LED2 | solid on | The device is fully provisioned and has full network and service connectivity. | | RGB LED | on | The `StateValue` attribute of the `BooleanState` cluster is `true` (simulating detection). | | RGB LED | off | The `StateValue` attribute of the `BooleanState` cluster is `false` (simulating no detection). | NOTE: `LED2` will be disabled when OTA is used. On `FRDM-MCXW71` board, `PTB0` is wired to both `LED2` and CS (Chip Select) of the External Flash Memory. Since the OTA image is stored in external memory, `LED2` operations will affect OTA operation by corrupting packages and OTA will not work. The user actions are summarized below: | button | action | state | output | | ------ | ----------- | ---------------------------- | -------------------------------------------------------------------------------------------------------------------------------------- | | SW2 | short press | not commissioned | Enable BLE advertising | | SW2 | short press | commissioned + device is LIT | Enable Active Mode | | SW2 | long press | NA | Initiate a factory reset (can be cancelled by pressing the button again within the factory reset timeout limit - 6 seconds by default) | | SW3 | short press | NA | Toggle attribute `StateValue` value | | SW3 | long press | NA | Clean soft reset of the device (takes into account proper Matter shutdown procedure) | ## Building Manually building requires running the following commands: ``` user@ubuntu:~/Desktop/git/connectedhomeip$ cd examples/contact-sensor-app/nxp/mcxw71 user@ubuntu:~/Desktop/git/connectedhomeip/examples/contact-sensor-app/nxp/mcxw71$ gn gen out/debug user@ubuntu:~/Desktop/git/connectedhomeip/examples/contact-sensor-app/nxp/mcxw71$ ninja -C out/debug ``` Please note that running `gn gen out/debug` without `--args` option will use the default gn args values found in `args.gni`. After a successful build, the `elf` and `srec` files are found in `out/debug/`. See the files prefixed with `chip-mcxw71-contact-example`. ## Flashing Two images must be written to the board: one for the host (CM33) and one for the `NBU` (CM3). ### Flashing the `NBU` image `NBU` image should be written only when a new NXP SDK is released. 1. Install [Secure Provisioning SDK tool](https://www.nxp.com/design/design-center/software/development-software/secure-provisioning-sdk-spsdk:SPSDK) using Python: ``` pip install spsdk ``` Note: There might be some dependencies that cause conflicts with already installed Python modules. However, `blhost` tool is still installed and can be used. 2. Updating `NBU` for Wireless examples It is necessary to work with the matching `NBU` image for the SDK version of the application you are working with. This means that when you download your SDK, prior to loading any wireless SDK example, update your `NBU` image with the SDK provided binaries. For `FRDM` users, please write the following binary: `middleware\wireless\ieee-802.15.4\bin\mcxw71\mcxw71_nbu_ble_15_4_dyn_matter_.sb3` Please note that `` may vary depending on the SDK version. 1. Place your device in `ISP` mode. - Make sure a jumper is placed on `JP25` - Press and hold `SW4`, press and release Reset, then release `SW4` 2. Once the device is connected, you may find the assigned port by running: ``` nxpdevscan ``` 3. Run the `blhost` command to write the `sb3` file: ``` blhost -p receive-sb-file \middleware\wireless\ieee-802.15.4\bin\mcxw71\mcxw71_nbu_ble_15_4_dyn_matter_.sb3 ``` ### Flashing the host image Host image is the one found under `out/debug/`. It should be written after each build process. If debugging is needed then jump directly to the [Debugging](#debugging) section. Otherwise, if only flashing is needed then [JLink](https://www.segger.com/downloads/jlink/) can be used: - Plug `MCXW71` to the USB port (no need to keep the `SW4` button pressed while doing this, e.g. ISP mode is not needed for host flashing) - Connect JLink to the device: ```bash JLinkExe -device MCXW71 -if SWD -speed 4000 -autoconnect 1 ``` - Run the following commands: ```bash reset halt loadfile chip-mcxw71-contact-example.srec reset go quit ``` ## Debugging One option for debugging would be to use MCUXpresso IDE. - Drag-and-drop the zip file containing the NXP SDK in the "Installed SDKs" tab: ![Installed SDKs](../../../platform/nxp/mcxw71_k32w1/doc/images/mcxw71_installed_sdks.jpg) - Import any demo application from the installed SDK: ``` Import SDK example(s).. -> choose a demo app (demo_apps -> hello_world) -> Finish ``` ![Import demo](../../../platform/nxp/mcxw71_k32w1/doc/images/import_demo.jpg) - Flash the previously imported demo application on the board: ``` Right click on the application (from Project Explorer) -> Debug as -> JLink/CMSIS-DAP ``` After this step, a debug configuration specific for the `MCXW71` board was created. This debug configuration will be used later on for debugging the application resulted after ot-nxp compilation. - Import Matter repo in MCUXpresso IDE as Makefile Project. Use _none_ as _Toolchain for Indexer Settings_: ``` File -> Import -> C/C++ -> Existing Code as Makefile Project ``` ![New Project](../../../platform/nxp/mcxw71_k32w1/doc/images/new_project.jpg) - Replace the path of the existing demo application with the path of the `MCXW71` application: ``` Run -> Debug Configurations... -> C/C++ Application ``` ![](../../../platform/nxp/mcxw71_k32w1/doc/images/mcxw71_debug.jpg) ## OTA Please see [mcxw71 OTA guide](../../../../docs/platforms/nxp/nxp_mcxw71_ota_guide.md).