BTSTACK: Bluetooth® LE Mesh Light Dimmable

This code example demonstrates the implementation of the Bluetooth® LE Mesh Light Dimmable application using the AIROC™ CYW20829 Bluetooth® LE SoC and ModusToolbox™ software environment.

In the Mesh Dimmable Light application, the user LED (LED2) is configured with a PWM; its brightness is controlled using the Mesh Controller Client application.

View this README on GitHub.

Provide feedback on this code example.

Requirements

ModusToolbox™ software v3.0 or later (tested with v3.0)
Board Support Package (BSP) minimum required version for CYW920829M2EVB-01: v1.0.0
Programming language: C
Associated parts: AIROC™ CYW20829 Bluetooth® LE SoC

Supported toolchains (make variable 'TOOLCHAIN')

GNU Arm® Embedded Compiler v10.3.1 (GCC_ARM) - Default value of TOOLCHAIN

Supported kits (make variable 'TARGET')

AIROC™ CYW20829 Bluetooth® LE SoC (CYW920829M2EVB-01) – Default value of TARGET

Hardware setup

This example uses the board's default configuration. See the kit user guide to ensure that the board is configured correctly.

Note: The AIROC™ CYW20829 Bluetooth® kit (CYW920829M2EVB-01) ships with KitProg3 version 2.30 installed. ModusToolbox™ requires KitProg3 with latest version 2.40. Before using this code example, make sure that the board is upgraded to KitProg3. The tool and instructions are available in the Firmware Loader GitHub repository. If you do not upgrade, you will see an error such as "unable to find CMSIS-DAP device" or "KitProg firmware is out of date".

Software setup

Install a terminal emulator if you don't have one. Instructions in this document use Tera Term.
Install the Mesh Client Controller application.

Note: The Android Mesh Client Controller application functionality depends on the availability of a compatible Bluetooth® stack and permissions on the Android handset device.

Using the code example

Create the project and open it using one of the following:

In Eclipse IDE for ModusToolbox™ software

Click the New Application link in the Quick Panel (or, use File > New > ModusToolbox™ Application). This launches the Project Creator tool.
Pick a kit supported by the code example from the list shown in the Project Creator - Choose Board Support Package (BSP) dialog.

When you select a supported kit, the example is reconfigured automatically to work with the kit. To work with a different supported kit later, use the Library Manager to choose the BSP for the supported kit. You can use the Library Manager to select or update the BSP and firmware libraries used in this application. To access the Library Manager, click the link from the Quick Panel.

You can also just start the application creation process again and select a different kit.

If you want to use the application for a kit not listed here, you may need to update the source files. If the kit does not have the required resources, the application may not work.
In the Project Creator - Select Application dialog, choose the example by enabling the checkbox.
(Optional) Change the suggested New Application Name.
The Application(s) Root Path defaults to the Eclipse workspace which is usually the desired location for the application. If you want to store the application in a different location, you can change the Application(s) Root Path value. Applications that share libraries should be in the same root path.
Click Create to complete the application creation process.

For more details, see the Eclipse IDE for ModusToolbox™ software user guide (locally available at {ModusToolbox™ software install directory}/docs_{version}/mt_ide_user_guide.pdf).

In command-line interface (CLI)

ModusToolbox™ software provides the Project Creator as both a GUI tool and the command line tool, "project-creator-cli". The CLI tool can be used to create applications from a CLI terminal or from within batch files or shell scripts. This tool is available in the {ModusToolbox™ software install directory}/tools_{version}/project-creator/ directory.

Use a CLI terminal to invoke the "project-creator-cli" tool. On Windows, use the command line "modus-shell" program provided in the ModusToolbox™ software installation instead of a standard Windows command-line application. This shell provides access to all ModusToolbox™ software tools. You can access it by typing modus-shell in the search box in the Windows menu. In Linux and macOS, you can use any terminal application.

The "project-creator-cli" tool has the following arguments:

Argument	Description	Required/optional
`--board-id`	Defined in the `<id>` field of the BSP manifest	Required
`--app-id`	Defined in the `<id>` field of the CE manifest	Required
`--target-dir`	Specify the directory in which the application is to be created if you prefer not to use the default current working directory	Optional
`--user-app-name`	Specify the name of the application if you prefer to have a name other than the example's default name	Optional

The following example will clone the "Mesh Light Dimmable" application with the desired name "MESH_Light_Dimmable" configured for the CYW920829M2EVB-01 BSP into the specified working directory, C:/mtb_projects:

project-creator-cli --board-id CYW920829M2EVB-01 --app-id mtb-example-btstack-freertos-mesh-light-dimmable --user-app-name Light_Dimmable --target-dir "C:/mtb_projects"

Note: The project-creator-cli tool uses the git clone and make getlibs commands to fetch the repository and import the required libraries. For details, see the "Project creator tools" section of the ModusToolbox™ software user guide (locally available at {ModusToolbox™ software install directory}/docs_{version}/mtb_user_guide.pdf).

In third-party IDEs

Use one of the following options:

Use the standalone Project Creator tool:
1. Launch Project Creator from the Windows Start menu or from {ModusToolbox™ software install directory}/tools_{version}/project-creator/project-creator.exe.
2. In the initial Choose Board Support Package screen, select the BSP, and click Next.
3. In the Select Application screen, select the appropriate IDE from the Target IDE drop-down menu.
4. Click Create and follow the instructions printed in the bottom pane to import or open the exported project in the respective IDE.

Use command-line interface (CLI):
1. Follow the instructions from the In command-line interface (CLI) section to create the application.
2. Export the application to a supported IDE using the make <ide> command.
3. Follow the instructions displayed in the terminal to create or import the application as an IDE project.

For a list of supported IDEs and more details, see the "Exporting to IDEs" section of the ModusToolbox™ software user guide (locally available at {ModusToolbox™ software install directory}/docs_{version}/mtb_user_guide.pdf).

Operation

Connect the board to your PC using the provided USB cable through the KitProg3 USB connector.
Use your favorite serial terminal application and connect to the KitProg3 COM port. Configure the terminal application to access the serial port using the following settings.

Baud rate: 115200 bps; Data: 8 bits; Parity: None; stop: 1 bit; Flow control: None; New line for receiving data: Line Feed(LF) or auto setting
Program the board using one of the following:
Using Eclipse IDE for ModusToolbox™ software
1. Select the application project in Project Explorer.
2. In the Quick Panel, scroll down, and click <Application Name> Program (KitProg3_MiniProg4).
Using CLI

From the terminal, execute the make program command to build and program the application using the default toolchain to the default target. The default toolchain and target are specified in the application's Makefile but you can override those values manually:
```
make program TARGET=<BSP> TOOLCHAIN=<toolchain>
```
Example:
```
make program TARGET=CYW920829M2EVB-01 TOOLCHAIN=GCC_ARM
```
After programming, the application starts automatically.Observe the messages on the UART terminal, and Confirm that " MESH Dimmable Light" is displayed on the UART terminal.

Figure 1. Terminal output on program startup
Confirm that the user LED (LED1) blinks at approximately 2 Hz which indicates that the mesh node is advertising with the name "MESH Dimmable Light".
Create a mesh network using the Mesh Client application.

Figure 2. Creating the mesh network
Provision the node using the Mesh Client application.

Figure 3. Provision the device
Control the light status and brightness level from the Mesh Client application. Tap the button to change the light status ON/OFF which changes the LED2 status ON/OFF. Moving the slider position changes the brightness level of LED2.

Figure 4. Controlling the light
Observe the lightness server level values printed on the terminal:

Figure 5. App console output
Press and hold the user button (SW2) for more than 5 seconds to perform a factory reset. Factory reset is recommended before flashing any newer firmware.

Note: The device goes to the unprovisioned state after a factory reset. Provision the device again to add it to the network (repeat the instructions from Step 7).

Enable BTSpy logs

Note: This feature is available only for CYW920829M2EVB-01.

Navigate to application Makefile and open it.
Find the makefile variable ENABLE_SPY_TRACES and set it to the value '1' as shown:
```
ENABLE_SPY_TRACES = 1
```
Save the Makefile, and then build and program the application to the board.
Open the Client Control application and do the following:
1. Set the baud rate to 3,000,000.
2. Deselect the Flow Control checkbox.
3. Select the serial port and click Open port.
4. Launch the BTSpy tool.
5. Press and release the reset button on the board to get BTSpy logs on the BTSpy tool.

Debugging

You can debug the example to step through the code. In the IDE, use the <Application Name> Debug (KitProg3_MiniProg4) configuration in the Quick Panel. For more details, see the "Program and debug" section in the Eclipse IDE for ModusToolbox™ software user guide.

Note: Debugging is of limited value when there is an active Bluetooth® LE connection because as soon as the Bluetooth® LE device stops responding, the connection will get dropped.

Design and implementation

The Bluetooth® Mesh Light Dimmable application implements Mesh Lightness Server models with a single element. The element subscribes to the messages from the client nodes in the Mesh network.

The application uses a UART resource from the Hardware Abstraction Layer (HAL) to print debug messages on a UART terminal emulator. The UART resource initialization and retargeting of standard I/O to the UART port are done using the retarget-io library.

Mesh traces can be enabled via the ENABLE_MESH_TRACES macro set in the Makefile. LED1 is used for showing the provisioning status; LED2 is used by the application.

The LED2 brightness value is controlled via a PWM. The Mesh clients publish the lightness level (0 to 65535), which is received by the Lightness Server message handler. The received value is converted into the PWM duty cycle range (0 to 100) to adjust the LED2 brightness.

The user button is configured with the GPIO interrupt ISR to detect the button press. Press the user button press for more then 5 seconds to factory reset the board. Powering the board ON/OFF five times also factory resets the node.

See the Bluetooth® Mesh API guide ({mtb_shared}/ble-mesh/release-{version}/docs/api_reference_manual.html) for more information about Bluetooth® Mesh APIs available as part of the BTStack SDK.

Figure 6. Design flow

Resources and settings

This section explains the ModusToolbox™ software resources and their configurations as used in this code example. Note that all the configurations explained in this section have already been implemented in the code example.

Table 1. Application resources

Resource	Alias/object	Purpose
UART (HAL)	cy_retarget_io_uart_obj	UART HAL object used by Retarget-IO for debug UART port
GPIO (HAL)	CYBSP_USER_LED1	This LED will blink during the advertisement
GPIO (HAL)	CYBSP_USER_LED2	This LED is for the user application as light node and is used for brightness control
GPIO (HAL)	CYBSP_USER_BTN	Used to factory reset the Mesh node on long button press

Related resources

Resources	Links
Application notes	AN227069 - Getting Started with Bluetooth® LE Mesh
Code examples	Using ModusToolbox™ software on GitHub
Development kits	Visit https://www.infineon.com/cms/en/design-support/finder-selection-tools/product-finder/evaluation-board/ and use the section to filter kits by Product family or Features.
Libraries on GitHub	mtb-hal-cat1 – Hardware Abstraction Layer (HAL) btstack – BTSTACK library ble-mesh – Bluetooth® LE Mesh Library retarget-io – Utility library to retarget STDIO messages to a UART port
Tools	Eclipse IDE for ModusToolbox™ software – ModusToolbox™ software is a collection of easy-to-use software and tools enabling rapid development with Infineon MCUs, covering applications from embedded sense and control to wireless and cloud-connected systems using AIROC™ Wi-Fi and Bluetooth® connectivity devices.

Other resources

Infineon provides a wealth of data at www.infineon.com to help you select the right device, and quickly and effectively integrate it into your design.

Document history

Document title: CE236649 – Bluetooth® LE Mesh Light Dimmable

Version	Description of change
1.0.0	New code example

© Cypress Semiconductor Corporation, 2022. This document is the property of Cypress Semiconductor Corporation, an Infineon Technologies company, and its affiliates ("Cypress"). This document, including any software or firmware included or referenced in this document ("Software"), is owned by Cypress under the intellectual property laws and treaties of the United States and other countries worldwide. Cypress reserves all rights under such laws and treaties and does not, except as specifically stated in this paragraph, grant any license under its patents, copyrights, trademarks, or other intellectual property rights. If the Software is not accompanied by a license agreement and you do not otherwise have a written agreement with Cypress governing the use of the Software, then Cypress hereby grants you a personal, non-exclusive, nontransferable license (without the right to sublicense) (1) under its copyright rights in the Software (a) for Software provided in source code form, to modify and reproduce the Software solely for use with Cypress hardware products, only internally within your organization, and (b) to distribute the Software in binary code form externally to end users (either directly or indirectly through resellers and distributors), solely for use on Cypress hardware product units, and (2) under those claims of Cypress’s patents that are infringed by the Software (as provided by Cypress, unmodified) to make, use, distribute, and import the Software solely for use with Cypress hardware products. Any other use, reproduction, modification, translation, or compilation of the Software is prohibited.
TO THE EXTENT PERMITTED BY APPLICABLE LAW, CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS DOCUMENT OR ANY SOFTWARE OR ACCOMPANYING HARDWARE, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. No computing device can be absolutely secure. Therefore, despite security measures implemented in Cypress hardware or software products, Cypress shall have no liability arising out of any security breach, such as unauthorized access to or use of a Cypress product. CYPRESS DOES NOT REPRESENT, WARRANT, OR GUARANTEE THAT CYPRESS PRODUCTS, OR SYSTEMS CREATED USING CYPRESS PRODUCTS, WILL BE FREE FROM CORRUPTION, ATTACK, VIRUSES, INTERFERENCE, HACKING, DATA LOSS OR THEFT, OR OTHER SECURITY INTRUSION (collectively, "Security Breach"). Cypress disclaims any liability relating to any Security Breach, and you shall and hereby do release Cypress from any claim, damage, or other liability arising from any Security Breach. In addition, the products described in these materials may contain design defects or errors known as errata which may cause the product to deviate from published specifications. To the extent permitted by applicable law, Cypress reserves the right to make changes to this document without further notice. Cypress does not assume any liability arising out of the application or use of any product or circuit described in this document. Any information provided in this document, including any sample design information or programming code, is provided only for reference purposes. It is the responsibility of the user of this document to properly design, program, and test the functionality and safety of any application made of this information and any resulting product. "High-Risk Device" means any device or system whose failure could cause personal injury, death, or property damage. Examples of High-Risk Devices are weapons, nuclear installations, surgical implants, and other medical devices. "Critical Component" means any component of a High-Risk Device whose failure to perform can be reasonably expected to cause, directly or indirectly, the failure of the High-Risk Device, or to affect its safety or effectiveness. Cypress is not liable, in whole or in part, and you shall and hereby do release Cypress from any claim, damage, or other liability arising from any use of a Cypress product as a Critical Component in a High-Risk Device. You shall indemnify and hold Cypress, including its affiliates, and its directors, officers, employees, agents, distributors, and assigns harmless from and against all claims, costs, damages, and expenses, arising out of any claim, including claims for product liability, personal injury or death, or property damage arising from any use of a Cypress product as a Critical Component in a High-Risk Device. Cypress products are not intended or authorized for use as a Critical Component in any High-Risk Device except to the limited extent that (i) Cypress’s published data sheet for the product explicitly states Cypress has qualified the product for use in a specific High-Risk Device, or (ii) Cypress has given you advance written authorization to use the product as a Critical Component in the specific High-Risk Device and you have signed a separate indemnification agreement.
Cypress, the Cypress logo, and combinations thereof, WICED, ModusToolbox, PSoC, CapSense, EZ-USB, F-RAM, and Traveo are trademarks or registered trademarks of Cypress or a subsidiary of Cypress in the United States or in other countries. For a more complete list of Cypress trademarks, visit www.infineon.com. Other names and brands may be claimed as property of their respective owners.

License

Infineon/mtb-example-btstack-freertos-mesh-light-dimmable

About

Resources

License

Stars

Watchers

Forks

Releases

Packages 0

Languages

Packages