ATWILC3000 BlueKitchen BTstack User Guideww1.microchip.com/downloads/en/DeviceDoc/ATWILC3000-Blue...ATWILC3000 ATWILC3000 BlueKitchen BTstack User Guide Introduction The ATWILC3000

ATWILC3000 ATWILC3000 BlueKitchen BTstack User Guide

Introduction

The ATWILC3000 is a single chip IEEE® 802.11 b/g/n RF/Baseband/Medium Access Control (MAC) linkcontroller and Bluetooth® 5.0 compliant module. This single-chip solution contains separate Bluetooth andWLAN subsystems that share a single RF section with Bluetooth/Wi-Fi® coexistence handledautomatically.

Each subsystem has its own physical interface: WLAN control and data use Secure Digital Input Output(SDIO)/Serial Peripheral Interface (SPI), while Bluetooth is available via the UART interface. Bothsubsystems require separate protocol stacks. For WLAN, a TCP/IP stack with IEEE 802.11 driver for theATWILC3000 is used, while Bluetooth uses a Bluetooth stack.

This document describes the use of “BTstack”, a third party Bluetooth Stack provided by BlueKitchenGmbH. BTstack is free for evaluation and non-commercial use. For license information, contactBlueKitchen GmbH.

This document also provides a quick overview on the use of the ATWILC3000 as a BLE Peripheral.BTstack is not limited to this usage and more information can be found in the API documentation and inthe BTstack manual, available at: https://bluekitchen-gmbh.com/btstack/.

Note: 1. The BlueKitchen BLE stack is supported in ATWILC RTOS Driver Release 4.03 and available from

Advanced Software Framework (ASF) 3.42 and later.2. For more information on BlueKitchen GmbH contact:

BlueKitchen GmbH

Engelstrasse 9

8004 Zurich

Switzerland

Web: https://bluekitchen-gmbh.com

E-mail: [email protected]

© 2018 Microchip Technology Inc. User Guide DS50002795A-page 1

https://bluekitchen-gmbh.com/btstack/https://bluekitchen-gmbh.com

Table of Contents

Introduction......................................................................................................................1

1. BLE Application Related API..................................................................................... 31.1. Advertisement.............................................................................................................................. 31.2. Scanning...................................................................................................................................... 31.3. HCI Event Handling......................................................................................................................3

2. GATT Server Setup................................................................................................... 4

3. BLE Reference Example........................................................................................... 53.1. LE Counter Application.................................................................................................................53.2. LE Transparent Application.......................................................................................................... 93.3. LE Wi-Fi Provisioning Application...............................................................................................113.4. Wi-Fi and BLE Coexistence Application.....................................................................................15

4. Revision History.......................................................................................................18

The Microchip Web Site................................................................................................ 19

Customer Change Notification Service..........................................................................19

Customer Support......................................................................................................... 19

Microchip Devices Code Protection Feature................................................................. 19

Legal Notice...................................................................................................................20

Trademarks................................................................................................................... 20

Quality Management System Certified by DNV.............................................................21

Worldwide Sales and Service........................................................................................22

ATWILC3000


1. BLE Application Related APIThis chapter describes the BTstack API used for simple Bluetooth Low Energy (BLE) applicationdevelopment.

1.1 AdvertisementThe following API is used for BLE advertisement operation:

• gap_advertisements_set_params• gap_advertisements_set_data• gap_scan_response_set_data• gap_advertisements_enable

1.2 ScanningThe following API is used for BLE scanning operation:

• gap_set_scan_parameters• gap_start_scan• gap_stop_scan

1.3 HCI Event HandlingThe user needs to register the HCI Event handler for all HCI events and add it to the handler list.

For example, assume a packet handler and a global variable such as:

static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);static btstack_packet_callback_registration_t hci_event_callback_registration;

The packet handler can be added by the following snippet:

hci_event_callback_registration.callback = &packet_handler;hci_add_event_handler(&hci_event_callback_registration);

ATWILC3000BLE Application Related API


2. GATT Server SetupTo implement a LE Peripheral and to exchange data, a GATT profile containing all GATT services withtheir characteristics has to be defined. BTstack uses a compact read-only representation of the GATTprofile that can be stored in Flash to minimize the RAM requirements. As all the GATT requests areimplemented via the ATT protocol in Bluetooth, the GATT services and characteristics are also stored asa list of equivalent ATT Attributes.

For this, the tool compile_gatt.py is available at:https://github.com/bluekitchen/btstack/blob/master/tool/compile_gatt.py

The following is the format of compile_gatt.py:$ compile_gatt.py input.gatt output.h

A few examples can be found in the ASF directory path at:

thirdparty\wireless\bt_wilc_sdk\bt_src\ble\gatt-service.For more details about the GATT Server, refer to the manual available at:

http://bluekitchen-gmbh.com/btstack/develop/Profiles/GATT Server

Alternatively, the ATT Database can be created at runtime in RAM using the att_db_util helperfunctions.

Here is a snippet for the GATT definition of the GATT GAP Service that contains the device name:

PRIMARY_SERVICE, GAP_SERVICE

CHARACTERISTIC, GAP_DEVICE_NAME, READ, “LE Counter”

The binary representation of ATT attribute is structured as follows:

Attribute size in byte Flags Handle UUID Value

(16 bit) (16 bit) (16 bit) (16/128 bit) (….)

The compile_gatt.py tool then creates the following representation:

// 0x0001 PRIMARY_SERVICE-GAP_SERVICE0x0a, 0x00, 0x02, 0x00, 0x01, 0x00, 0x00, 0x28, 0x00, 0x18,

// 0x0002 CHARACTERISTIC-GAP_DEVICE_NAME-READ0x0d, 0x00, 0x02, 0x00, 0x02, 0x00, 0x03, 0x28, 0x02, 0x03, 0x00, 0x00, 0x2a,

// 0x0003 VALUE-GAP_DEVICE_NAME-READ-'LE Counter'// READ_ANYBODY0x12, 0x00, 0x02, 0x00, 0x03, 0x00, 0x00, 0x2a, 0x4c, 0x45, 0x20, 0x43, 0x6f, 0x75, 0x6e, 0x74, 0x65, 0x72,

With this, the ATT server can be set up using:* att_server_init* att_server_register_packet_handler

ATWILC3000GATT Server Setup


https://github.com/bluekitchen/btstack/blob/master/tool/compile_gatt.pyhttp://bluekitchen-gmbh.com/btstack/develop/profiles/#gatt-generic-attribute-profile

3. BLE Reference ExampleThis chapter describes the functional overview of all the applications that are pre-defined in the AtmelStudio. For information about commercial licensing options contact: [email protected].

3.1 LE Counter ApplicationThe LE Counter examples demonstrate how to specify a minimal GATT database with a custom GATTservice and custom characteristic that sends periodic notifications.

3.1.1 Database DetailsThe following table provides the database details for LE Counter application.

Table 3-1. Database Details for LE Counter Application

Service UUID

Battery 180F

Custom 0000FF10-0000-1000-8000-00805F9B34FB

3.1.2 Running the DemoPerform the following steps to run the demo.

1. Open any Terminal Application (TeraTerm, for example). Select the COM Port enumerated on thePC and set the following parameters:

– Baudrate 115200– Parity None– One Stop bit– One Start bit– No Hardware Handshake

2. Press the Reset button on the ATSAMV71 Xplained Ultra board.3. The device is in Advertising mode.4. Open the Microchip Bluetooth Data application in the iTunes® or Google Play™ Store and click

Bluetooth Smart on the application dashboard to scan for the peripheral devices, as illustrated inthe following figure.

ATWILC3000BLE Reference Example


Figure 3-1. Dashboard of Microchip Bluetooth Data Application

5. The scanning page is displayed. Click START SCAN to display the list of discoverable devices. Thedevice name LE Counter is displayed among the list of scanned devices.Figure 3-2. Scanning for Devices



6. Select the LE Counter application name for connection.7. Once the device is connected, a list of supported services for the device is displayed in the service

list page.Figure 3-3. Display of Services Supported by the Application

8. From the service list page, click Battery Service to display the Battery simulation page.



Figure 3-4. Battery Simulation Page

9. From the service list page, click Unknown Service or Generic Information to access the CustomService related information.Figure 3-5. Generic Information Page

10. Click Characteristics under Unknown Service to display the characteristic information.



Figure 3-6. Characteristic Information Page

11. Click Read to read the characteristic information.12. Click Notify to trigger continuous notification incremental counter value display on the console log.

Figure 3-7. Incremental Counter Value Console Log

3.2 LE Transparent ApplicationThe LE Transparent application demonstrates how to perform data exchange between the client and theserver.

3.2.1 Database DetailsThe following table provides the database details for LE Transparent application.



Table 3-2. Database Details for LE Transparent Application

Service UUID

Transparent 49535343-FE7D-4AE5-8FA9-9FAFD205E455




2. Press the Reset button on ATSAMV71 Xplained Ultra board.3. The device is in Advertising mode.4. Open the Microchip Bluetooth Data application and click Bluetooth Smart on the application

dashboard to scan for the peripheral devices, as illustrated in Figure 3-1.5. The scanning page is displayed. Click Scan (To scan devices around you) and it opens another

scan page with the SCAN tab. Click SCAN to display the list of discoverable devices. The devicename “LE-TRANSPARENT” is displayed among the list of scanned devices.Figure 3-8. Scanning for Devices



6. Select the LE-Transparent application name for connection.7. Once the device is connected, LE-TRANSPARENT page is displayed and the user needs to click

the Transparent (Transfer data to device) tab for Transparent service functionality.Figure 3-9. Display of Services Supported by the Application

8. In the Transparent service functionality, enter any text message in the text box and click SEND tosend the data to another device. By default, the RAW tab is enabled for sending the data. The usercan select the Timer tab to send the data in an interval.Figure 3-10. LE-Transparent Page

3.3 LE Wi-Fi Provisioning ApplicationThe LE Wi-Fi Provisioning application demonstrates how to provision Wi-Fi via BLE usingtheATWILC3000 Wi-Fi BLE module.

3.3.1 Database DetailsThe following table provides the database details for LE Provisioning application.



Table 3-3. Database Details for LE Provisioning Application

Service UUID

Provisioning service 77880001-D229-11E4-8689-0002A5D5C51B

Scanning service FB8C0001-D224-11E4-85A1-0002A5D5C51B




2. Press the Reset button on ATSAMV71 Xplained Ultra board.3. The device is in Advertising mode.4. Open the Microchip Bluetooth Data application and click BLE Provisioner on the application

dashboard to scan for the peripheral devices, as illustrated in the following figure.Figure 3-11. Dashboard of Microchip Bluetooth Data Application

5. The device name MCHP_WIFI is displayed among the list of scanned devices.



Figure 3-12. Scan Page

6. Select MCHP_WIFI for BLE connection.Figure 3-13. Provisioning Connection Page

7. Select Scan to scan for the AP list. When scanning for the AP list, the Scan button is disabled andit will be enabled again once the application receives the AP list.



Figure 3-14. Scanning in Process for Provisioning

8. Once the AP list is displayed, select the AP from the scanned list. Based on security type used,enter the information in the “Enter Network Key” section.Figure 3-15. Scan AP List

9. Once the user selects the AP and provides the information (Network Key), the Provision tab isdisplayed to start the connection procedure. Click Provision for starting the connection.



Figure 3-16. Provision Page

10. A notification “Provisioning Complete” pop-up is displayed once the Wi-Fi connection is established.Click OK, and the BLE connection is disconnected and Wi-Fi connection remains active.Figure 3-17. Provision Complete Page

3.4 Wi-Fi and BLE Coexistence ApplicationThe coexistence application demonstrates concurrent operation of Wi-Fi in Station (STA) and AP modealong with an active BLE connection. The BLE connection advertises an LE Counter service. The LECounter examples demonstrate how to specify a minimal GATT database with a custom GATT service



and custom characteristic that sends periodic notifications. The value in the notification is updated in theAP web server as well as the Microchip Bluetooth Data application.


1. Load the Coexistence application on the ATWILC3000 after entering the details of AP with internetconnection in sta.h.



3. Press the Reset button on ATSAMV71 Xplained Ultra board.4. Enter http://192.168.5.1 in the web browser to connect to the web server hosted on the

ATWILC3000. The battery counter is updated as shown in the following figure.Figure 3-18. Web server

5. The device is in Advertising mode.6. Open the Microchip Bluetooth Data application and click BLE Smart on the application dashboard

to scan for the peripheral devices, as illustrated in Figure 3-1.



http://192.168.5.1

7. The scanning page is displayed. Click START SCAN to display the list of discoverable devices. Thedevice name LE Counter is displayed among the list of scanned devices, as illustrated in Figure3-2.

8. Select LE Counter application name for connection.9. Once the device connected, list of supported services for the device is displayed in service list

page, see Figure 3-3.10. From the service list page, click Battery Service to display the battery simulation page, see Figure

3-4.11. The two counters in the web page and the Microchip Bluetooth application are in sync

demonstrating the coexistence functionality.



4. Revision HistoryRevision Date Section Description

A 09/2018 Document Initial Release

ATWILC3000Revision History


The Microchip Web Site

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Customers should contact their distributor, representative or Field Application Engineer (FAE) for support.Local sales offices are also available to help customers. A listing of sales offices and locations is includedin the back of this document.

Technical support is available through the web site at: http://www.microchip.com/support

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Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.• Microchip believes that its family of products is one of the most secure families of its kind on the

market today, when used in the intended manner and under normal conditions.• There are dishonest and possibly illegal methods used to breach the code protection feature. All of

these methods, to our knowledge, require using the Microchip products in a manner outside theoperating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so isengaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

ATWILC3000


http://www.microchip.com/http://www.microchip.com/http://www.microchip.com/support

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of theircode. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving thecode protection features of our products. Attempts to break Microchip’s code protection feature may be aviolation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your softwareor other copyrighted work, you may have a right to sue for relief under that Act.

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GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary ofMicrochip Technology Inc., in other countries.

All other trademarks mentioned herein are property of their respective companies.

ATWILC3000


© 2018, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.

ISBN: 978-1-5224-3554-9

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ISO/TS 16949Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and waferfabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in Californiaand India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC®

DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory andanalog products. In addition, Microchip’s quality system for the design and manufacture of developmentsystems is ISO 9001:2000 certified.

ATWILC3000


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Worldwide Sales and Service


IntroductionTable of Contents1. BLE Application Related API1.1. Advertisement1.2. Scanning1.3. HCI Event Handling

2. GATT Server Setup3. BLE Reference Example3.1. LE Counter Application3.1.1. Database Details3.1.2. Running the Demo

3.2. LE Transparent Application3.2.1. Database Details3.2.2. Running the Demo

3.3. LE Wi-Fi Provisioning Application3.3.1. Database Details3.3.2. Running the Demo

3.4. Wi-Fi and BLE Coexistence Application3.4.1. Running the Demo

4. Revision HistoryThe Microchip Web SiteCustomer Change Notification ServiceCustomer SupportMicrochip Devices Code Protection FeatureLegal NoticeTrademarksQuality Management System Certified by DNVWorldwide Sales and Service

Documents

ATWILC3000 BlueKitchen BTstack User Guideww1.microchip.com/downloads/en/DeviceDoc/ATWILC3000-Blue...ATWILC3000 ATWILC3000 BlueKitchen BTstack User Guide Introduction The ATWILC3000