SILICON LABS 7.0.0.0 GA Gecko Software Development Kit User Guide

SILICON LABS 7.0.0.0 GA Gecko Software Development Kit

Product Information

Specifications

• Gecko SDK Suite : 4.4
• Release Date : December 13, 2023
• SDK Version(s) : 7.0.0.0 GA
• Key Features: Bluetooth, Multiprotocol
• Compatible Compilers: GCC (The GNU Compiler Collection) version 12.2.1

Product Usage Instructions

Compatibility and Use Notices

• For information about security updates and notices, please refer to the Security chapter of the Gecko Platform Release notes installed with this SDK or on the TECH DOCS tab on https://www.silabs.com/developers/bluetooth-low-energy.
• We strongly recommend subscribing to Security Advisories for up-to-date information. If you are new to the Silicon Labs
• Bluetooth SDK or need instructions on using Secure Vault features, please see the “Using This Release” section.

New Features

The Gecko SDK will continue to support all Series 0 and 1 devices with no change to the long-term support, maintenance, quality, and responsiveness provided under our software policy. The new SDK will branch from Gecko SDK and begin to offer new features that help developers take advantage of the advanced capabilities of our Series 2 and 3 products. This decision aligns with customer feedback, reflecting our commitment to elevate quality, ensure stability, and enhance performance for an exceptional user experience across our software SDKs.

New Items
The following new items were added in release 7.0.0.0:

1. Bluetooth Connection Analyzer: A new feature component, bluetooth_feature_connection_analyzer, provides the functionality to capture and analyze the RSSI of transmissions on a Bluetooth connection.

New APIs
The following new APIs were added in release 7.0.0.0:

• ID # 1203776: Introduces a new ESL C library event ID, ESL_LIB_EVT_PAWR_CONFIG. A PAwR configuration is now subject to a preliminary sanity check by the ESL C library before the configuration is set. If the check fails, the configuration is rejected.
• ID # 1196297: Adds support to HADM for an arbitrary number of channels up to 80
• ID # 1187941: ‘bt_abr_host_initiator’ now has the function to save the jsonl logfiles to a selected folder using the command argument ‘-d’. In case the parameter is empty or a non-valid path to a directory, it will use the current working directory and inform the user.
• ID # 1158040: Adds quality metrics to HADM Initiator by displaying the calculated distance likeliness on the user interface
• ID # 1152853: Adds a new communication channel option to NCP-host examples: SPI over Co-Processor Communication (CPC). ID # 1108849: Introduces a Python script, create_bl_files.py, which merges the .bat and .sh scripts into one. It includes new features compared to the old scripts such as helper and additional command arguments to select required configurations, interactive mode for setting up missing tools or files, generating compressed GBLs (both lzma and lz4 compression methods), and device logic handling for series-1 and series-2 devices.

FAQ (Frequently Asked Questions)

1. Q: Where can I find security updates and notices?
   A: For security updates and notices, please refer to the Security chapter of the Gecko Platform Release notes installed with this SDK or on the TECH DOCS tab on https://www.silabs.com/developers/bluetooth-low-energy. We also recommend subscribing to Security Advisories for up-to-date information.

2. Q: How can I use Secure Vault features?
   A: If you need instructions on using Secure Vault features, please refer to the documentation in the “Using This Release” section.

3. Q: What compilers are compatible with the Gecko SDK?
   A: The Gecko SDK is compatible with GCC (The GNU Compiler Collection) version 12.2.1, which is provided with Simplicity Studio. Please ensure that you are using the correct files.

Bluetooth® LE SDK 7.0.0.0 GA

• Gecko SDK Suite 4.4
• December 13, 2023
• Silicon Labs is a leading vendor in Bluetooth hardware and software technologies, used in products such as sports and fitness, consumer electronics, beacons, and smart home applications. The core
• SDK is an advanced Bluetooth 5.4-compliant stack that provides all of the core functionality along with multiple API to simplify development. The core func-tionality offers both standalone mode allowing a developer to create and run their application directly on the SoC, or in NCP mode allowing for the use of an external host MCU.
• These release notes cover SDK version(s):
  • 7.0.0.0 GA released December 13, 202

KEY FEATURES

• Bluetooth
  • New feature component bluetooth_feature_connection_analyzer provides the functionality to capture and analyze the RSSI of transmissions on a Bluetooth connection
• Multiprotocol
  • Concurrent Listening support (RCP) –MG21 and MG24
  • Concurrent Multiprotocol (CMP) Zigbee NCP + OpenThread RCP – production quality
  • Dynamic Multiprotocol Bluetooth + Con-current Multiprotocol (CMP) Zigbee and Open Thread support on SoC

Compatibility and Use Notices

• For information about security updates and notices, see the Security chapter of the Gecko Platform Release notes installed with this SDK or on the TECH DOCS tab on
• https://www.silabs.com/developers/bluetooth-low-energy. Silicon Labs also strongly recommends that you subscribe to Security Advisories for up-to-date information. For instructions as well as notes on using Secure Vault features, or if you are new to the Silicon Labs Bluetooth SDK, see Using This Release.
• Compatible Compilers:
  • IAR Embedded Workbench for ARM (IAR-EWARM) version 9.40.1.
  • Using wine to build with the IarBuild.exe command line utility or IAR Embedded Workbench GUI on macOS or Linux could result in incorrect files being used due to collisions in wine’s hashing algorithm for generating short file names.
  • Customers on macOS or Linux are advised not to build with IAR outside of Simplicity Studio. Customers who do should carefully verify that the correct files are being used.
  • GCC (The GNU Compiler Collection) version 12.2.1, provided with Simplicity Studio.

New Items

This release of the Gecko SDK (GSDK) will be the last with combined support for all EFM and EFR devices, except for patches to this version as needed. Starting in mid-2024 we will introduce separate SDKs:

• The existing Gecko SDK will continue with support for Series 0 and 1 devices.
• A new SDK will cater specifically to Series 2 and 3 devices.
• The Gecko SDK will continue to support all Series 0 and 1 devices with no change to the long-term support, maintenance, quality, and responsiveness provided under our software policy.
• The new SDK will branch from Gecko SDK and begin to offer new features that help developers take advantage of the advanced capa-bilities of our Series 2 and 3 products.
• This decision aligns with customer feedback, reflecting our commitment to elevate quality, ensure stability, and enhance performance for an exceptional user experience across our software SDKs.

New Features

• Added in release 7.0.0.0
• Bluetooth Connection Analyzer
• New feature component bluetooth_feature_connection_analyzer provides the functionality to capture and analyze the RSSI of transmis-sions on a Bluetooth connection.

New APIs

• Added in release 7.0.0.0
• sl_bt_connection_analyzer_start command: Start to analyze another device’s connection and report the RSSI measurements.
• sl_bt_connection_analyzer_stop command: Stop analyzing another device’s Bluetooth connection.
• sl_bt_evt_connection_analyzer_report event: Triggered when packets transmitted on a connection are captured.
• sl_bt_evt_connection_analyzer_completed event: Triggered when the operation of analyzing a connection is completed.
• sl_bt_connection_get_scheduling_details command: Get parameters and next connection event scheduling details of a connection. sl_bt_connection_get_median_rssi command: Get the RSSI value measured on a connection.
• sl_bt_sm_resolve_rpa command: Find the identity address of a bonded device by a resolvable private address (RPA).
• sl_bt_evt_connection_set_parameters_failed event: Triggered when the peer device rejected an L2CAP connection parameter update request.

PAwR configuration is now subject to a preliminary sanity check by the ESL C library before the configuration is set – if the check fails, the configuration is rejected.
1196297| Added support to HADM for arbitrary number of channels up to 80.
1187941| ‘bt_abr_host_initiator’ now has the function to save the jsonl logfiles to a selected folder using the command argument ‘-d’. In case the parameter is empty or a non-valid path to a directory it will use the current working directory and inform the user.
1158040| Add quality metrics to HADM Initiator by displaying the calculated distance likeliness on the user interface.
1152853| New communication channel option added to NCP-host examples: SPI over Co-Processor Communication (CPC).

1108849

|

• Python script create_bl_files.py introduced to merge the .bat and .sh scripts into one. New features compared to the old scripts:
• helper and additional command arguments to select required configuration
• interactive mode: in case some of the tools or files are missing this script will help you to set it up
• generate compressed GBLs (both lzma and lz4 compression methods)
• device logic handling for series-1 and series-2 devices

---|---

 Improvements

Changed Items
Changed in release 7.0.0.0

configuration according to the ESL Service specification. The new logic now prevents a number of false positive detections and the resulting exclusion of valid ESLs from the network.
1144612| cJSON third party library update from GitHub: https://github.com/DaveGamble/cJSON @commit: b45f48e600671feade0b6bd65d1c69de7899f2be (master)
1193924| Migrate BLE SDK examples to use either legacy_scanner API or extended_scanner API instead of the deprecated scanner API.
1177424| Opening the Component Library in Studio and selecting any of the components that come from app/bluetooth now shows a “Documentation” section under “Dependencies” and “Dependents” sections with the content hosted on docs.silabs.com for that component.

• Changed APIs
  • Changed in release 7.0.0.0 None.
• Intended Behavior
  • Changed in release 7.0.0.0

Fixed Issues

Fixed in release 7.0.0.0

success without actually performing the command if an RTOS and the Bluetooth on-demand start component was used and the application issued a Bluetooth command while the Bluetooth stack was stopped.
1130635| Fix an issue that could cause a crash on FreeRTOS if the Bluetooth on-demand start feature is used and the FreeRTOS timer task has been configured to have a lower priority than the Bluetooth tasks.
1164357| Update the error code from insufficient_encryption to insufficient_authentication as specified in Bluetooth specification when GATT client tries to access GATT attribute which requires security and the connection is not bonded or encrypted.
1170640| Fix a race condition in GATT Client that the ATT MTU exchange could be prevented if the user application calls a GATT Client command that in turn starts a GATT procedure with the remote GATT Server under the context of sl_bt_evt_connection_opened event handling in SoC mode.
1180413| Fix an issue that could cause thread priority inversion and decrease Bluetooth connection reliability with FreeRTOS if the FreeRTOS timer task has been configured to have a lower priority than the Bluetooth tasks.
1192858| Improve advertisement report handling over the HCI interface. Now it is possible to configure maximum number of queued advertisement reports. This improves performance over slow HCI connection.
1196365| Fix an issue seen with DTM when watchdog timer component presents.
1196429| Optimize connection establishment in a DMP configuration. In certain cases the packet was not processed fast enough which caused connection loss.
1198175| Fix PAwR scanner window widening calculation after missed subevent packet. Add PAwR response slot window widening calculation to advertiser device. The fix is available in Bluetooth SDK 6.2.0 and newer.
1206647| Fix a bug in the Bluetooth link layer that was caused by incorrect handling an error if the transmission of the connection indication packet by the central failed.
1209154| Fix a bug that could prevent the demo mode from working more than once in an ESL AP session. The AP Pyhon sample code now does not allow changing the mode while the EFR Connect application is connected in demo mode, and it is now possible to query the current state of the demo via the CLI interface.
1212515| Fix an issue in the RCP mode that made the LE_Set_Periodic_Advertising_Subevent_Data HCI command erroneously fail when data for multiple subevents was set at the same time with certain lengths. Fix another issue in the RCP mode that allowed indefinitely reserving an unusable connection handle when the Host did not wait for the Connection Complete HCI event before calling another LE_Create_Connection command.
1215158| PAwR subevent data requesting-setting procedure now follows the core specification strictly. Data provided by the host will be sent in the given order and data arriving too late will not be sent in the forthcoming periodic advertising interval.
1216550| Fix a bug in command sl_bt_gatt_server_send_user_read_response that the GATT server may add more than ATT MTU – 4 number of bytes as the characteristic value in the read response to opcode ATT_READ_BY_TYPE_REQ. The documentation of this command is also fixed that the maximum number of bytes in response to opcode ATT_READ_BY_TYPE_REQ is ATT MTU – 4.
1218112| Fix a race condition between the connection termination and channel map update procedure that could cause a double buffer free.
1223155| Fix a memory access violation in the host stack when processing the HCI_LE_Read_Remote_Features_Complete event if the connection handle in the event is invalid.
1218866| Bluetooth RAIL DMP – SoC Empty FreeRTOS/Micrium OS Sample Apps are now available for xG28 (BRD4400A/B/C, BRD4401A/B/C).
1214140| BLE ESL examples now support BRD4402B and BRD4403B boards.
1212633| Fix iop_create_bl_files.sh script failure on MacOS.
1209154| Fixed a bug that could prevent the ESL demo mode from working more than once in an AP session. The AP Python sample code now does not allow changing the mode while the EFR Connect application is connected in demo mode, while it is now possible to query the current state of the demo via the CLI interface.
1205333| Eliminated the need to manually change the type of UART flow control after creating the ESL AP NCP project for numerous supported boards.
1205317| The Silabs vendor specific 0x1F opcode for the ESL experimental PAwR interval skip function has been added to the ESL AP readme document.
ID #| Description
---|---
1192305| Added a configurable delay to In-Place OTA DFU component before closing the connection with the Central device. This resolves the procedure’s issues with In-Place OTA transfer and the latest EFR Connect v2.7.1 or later.
1225207| Fixed issue: NULL dereferencing can occur in ESL C lib which leads to ESL AP to crash in while configuring large networks.
1223186| Corrected app_timer for OS to apply ceiling of the requested value based on OS timer frequency to operate in the same way as bare-metal variant. Extended documentation that describes the limitations on resolution and mentions OS timer frequency configuration parameters that can be set to modify the timer frequency (and the resolution).
1203408| Application OTA DFU may enter an incorrect state if the application sends an sl_bt_evt_gatt_server_user_write_request_id event.
1208252| Initiator now closes connection at exit.
1180678| Stability improvements

 Known Issues in the Current Release

Issues in bold were added since the previous release. If you have missed a release, recent release notes are available on https://www.si- labs.com/developers/bluetooth-low-energy in the Tech Docs tab.

368403

| If setting CTE interval to 1, a CTE request should be sent in every connection interval. But it is sent only in every second connection interval.| None

641122

| The Bluetooth stack component does not provide a configuration for RF antenna path.| This is an issue specifically for BGM210P. One workaround is to manually update the configuration in sl_bluetooth_config.h in text edit mode.

If the OTA with Apploader is used, include the bluetooth_feature_ota_config component in application project. Call command sl_bt_ota_set_rf_path() to set the RF path for OTA mode.

650079| LE 2M PHY on EFR32[B|M]G12 and EFR32[B|M]G13 doesn’t work with smartphones using the Mediatek Helio chip due to an interoperability issue.| No workaround exists. For application development and testing, the disconnection can be avoided by disabling 2M PHY with sl_bt_connection_set_preferred_phy() or sl_bt_connection_set_default_preferred_phy().
682198| The Bluetooth stack has an interoperability issue on the 2M PHY with a Windows PC.| No workaround exists. For application development and testing, the disconnection can be avoided by disabling 2M PHY with sl_bt_connection_set_preferred_phy() or sl_bt_connection_set_default_preferred_phy().

730692

| 4-7% packet error rate is observed on EFR32M|BG13 devices when RSSI is between -25 and -10 dBm. The PER is nominal (as per the datasheet) both above and below this range.| None
756253| The RSSI value on a Bluetooth connection returned by the Bluetooth API is incorrect on EFR32M|B1, EFR32M|B12, EFR32M|B13, and EFR32M|B21 devices. On EFR32M|B21 devices. It is about 8~10 dBm higher than the actual value, according to a measurement.| Install the “RAIL Utility, RSSI” component in the application project. This component provides a default RSSI offset for the chip that is applied at the RAIL level and can help to achieve more accurate RSSI measurements.
845506| When the Bluetooth_feature_afh component for AFH is included, the feature initialization always enables AFH.| To include the component but not to enable AFH at device boot, change the parameter value from 1 to 0 in the function call of sl_btctrl_init_afh() in sl_bt_stack_init.c.
1031031| Changing the configuration in the bt_aoa_host_locator application results in the application crashing.| None
1227955| amazon_aws_soc_mqtt_over_ble and amazon_aws_soc_gatt_server examples don’t advertise after booting up.| Increase configTIMER_TASK_STACK_DEPTH to 600 or above in config/FreeRTOSConfig.h in the project.

Deprecated Items

Deprecated in release 7.0.0.0 Command sl_bt_connection_get_rssi

Removed Items
Removed from release 7.0.0.0

the Studio HADM GUI going forward.

Multiprotocol Gateway and RCP

• New Items
  • Added in release 7.0.0.0
  • Concurrent listening, the ability for the Zigbee and Open Thread stacks to operate on independent 802.15.4 channels when using an EFR32xG24 or xG21 RCP, is released. Concurrent listening is not available for the 802.15.4 RCP/Bluetooth RCP combination, the Zigbee NCP/Open Thread RCP combination, or for the Zigbee/Open Thread system-on-chip (SoC). It will be added to those products in a future release.
  • The OpenThread CLI vendor extension has been added to the OpenThread host apps of multiprotocol containers. This includes the coex cli commands.
• Improvements
  • Changed in release 7.0.0.0
  • The Zigbee NCP/OpenThread RCP multiprotocol combination is now production quality.
• Fixed Issues
  • Fixed in release 7.0.0.0

applications.
1090921| Z3GatewayCpc had trouble forming a network in a noisy environment.
1153055| An assert on the host was caused when there was a communication failure when reading the NCP version from the zigbee_ncp-ble_ncp-uart sample app.
1155676| The 802.15.4 RCP discarded all received unicast packets (after MAC acking) if multiple 15.4 interfaces shared the same 16-bit node ID.
1173178| The host falsely reported hundreds of packets received with mfglib in the Host-RCP setup.
1190859| EZSP error when sending mfglib random packets in the Host-RCP setup.
1199706| Data polls from forgotten end device children were not properly setting a pending frame on the RCP to queue a Leave & Rejoin command to the former child.
1207967| The “mfglib send random” command was sending out extra packets on Zigbeed.
1208012| The mfglib rx mode did not update packet info correctly when receiving on the RCP.
1214359| The coordinator node crashed when 80 or more routers tried to join simultaneously in the Host-RCP setup.
1216470| After relaying a broadcast for address mask 0xFFFF, a Zigbee RCP acting as a parent device would leave the pending data flag set for each child. This resulted in each child staying awake expecting data after each poll, and required some other pending data transaction to each end device to eventually clear this state.

Known Issues in the Current Release
Issues in bold were added since the previous release. If you have missed a release, recent release notes are available on https://www.si- labs.com/developers/gecko-software-development-kit.

planned in a future release.
937562| Bluetoothctl ‘advertise on’ command fails with rcpuart- 802154-blehci app on Raspberry Pi OS 11.| Use btmgmt app instead of bluetoothctl.
ID #| Description| Workaround
---|---|---
1022972| Coex not working on ZB NCP + OT RCP.| Support is planned for a future release.
1074205| The CMP RCP does not support two networks on the same PAN id.| Use different PAN ids for each network. Support is planned in a future release.
1122723| In a busy environment the CLI may become unresponsive in the z3 -light_ot-ftd_soc app.| No known workaround.
1170052| CMP Zigbee NCP + OT RCP and DMP Zigbee NCP + BLE NCP may not fit on 64KB and lower RAM parts in this current release.| 64KB parts not currently supported for these apps.
1213701| RCP may fail to indicate pending data for sleepy child during OTA upgrade to child in a noisy environment, resulting in update process terminating unexpectedly.| Will be addressed in a future release.
1221299| Mfglib RSSI readings differ between RCP and NCP.| Will be addressed in a future release.

Deprecated Items

• None
• Removed Items
  • Removed in release 7.0.0.0
  • The “NONCOMPLIANT_ACK_TIMING_WORKAROUND” macro has been removed. All RCP apps now by default support 192 µsec turnaround time for non-enhanced acks while still using 256 µsec turnaround time for enhanced acks required by CSL.

Using This Release

This release contains the following

• Silicon Labs Bluetooth stack library
• Bluetooth sample applications

For more information about the Bluetooth SDK see https://docs.silabs.com/bluetooth/latest/ . If you are new to Bluetooth see UG103.14: Bluetooth LE Fundamentals.

 Installation and Use

• The Bluetooth SDK is provided as part of the Gecko SDK (GSDK), the suite of Silicon Labs SDKs. To quickly get started with the GSDK, install Simplicity Studio 5, which will set up your development environment and walk you through GSDK installation. Simplicity Studio 5 includes everything needed for IoT product development with Silicon Labs devices, including a resource and project launcher, software configuration tools, full IDE with GNU toolchain, and analysis tools. Installation instructions are provided in the online Simplicity Studio 5 User’s Guide.

• Alternatively, Gecko SDK may be installed manually by downloading or cloning the latest from GitHub. See https://github.com/Sili-conLabs/gecko_sdk for more information.
  Simplicity Studio installs the GSDK by default in:

  • (Windows): C:\Users\\SimplicityStudio\SDKs\gecko_sdk
  • (MacOS): /Users//SimplicityStudio/SDKs/gecko_sdk

• Documentation specific to the SDK version is installed with the SDK. Additional information can often be found in the knowledge base articles (KBAs). API references and other information about this and earlier releases is available on https://docs.silabs.com/.

Security Information

• Secure Vault Integration
• When deployed to Secure Vault High devices, sensitive keys such as the Long Term Key (LTK) are protected using the Secure Vault Key Management functionality. The table below shows the protected keys and their storage protection characteristics.

compatibility reasons
Local Identity Resolving Key| Exportable| Must be Exportable because the key is shared with other devices.

• Wrapped keys that are marked as “Non-Exportable” can be used but cannot be viewed or shared at runtime.
• Wrapped keys that are marked as “Exportable” can be used or shared at runtime but remain encrypted while stored in flash. For more information on Secure Vault Key Management functionality, see
• AN1271: Secure Key Storage.
• Security Advisories
• To subscribe to Security Advisories, log in to the Silicon Labs customer portal, then select Account Home. Click HOME to go to the portal home page and then click the Manage Notifications tile. Make sure that ‘Software/Security Advisory Notices & Product Change Notices (PCNs)’ is checked, and that you are subscribed at minimum for your platform and protocol. Click Save to save any changes.

Support

• Development Kit customers are eligible for training and technical support. Use the Silicon Labs Bluetooth LE web page to obtain information about all Silicon Labs Bluetooth products and services, and to sign up for product support.
• You can contact Silicon Laboratories support at http://www.silabs.com/support.

Simplicity Studio
One-click access to MCU and wireless tools, documentation, software, source code libraries & more. Available for Windows, Mac and Linux!

• IoT Portfolio
  • www.silabs.com/IoT
• SW/HW
  • www.silabs.com/simplicity
• Quality
  • www.silabs.com/quality
• Support & Community
  • www.silabs.com/community

Disclaimer

• Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and  parameters provided can and do vary in different applications.
• Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes without further notice to the product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Without prior notification, Silicon Labs may update product firmware during the manufacturing process for security or reliability reasons. Such changes will not alter the specifications or the performance of the product. Silicon Labs shall have no liability for the consequences of use of the information supplied in this document. This document does not imply or expressly grant any license to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any FDA Class III devices, applications for which FDA premarket approval is required or Life Support
• Systems without the specific written consent of Silicon Labs. A is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Labs products are not designed or authorized for military applications. Silicon Labs products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. Silicon Labs disclaims all express and implied warranties and shall not be responsible or liable for any injuries or damages related to use of a Silicon Labs product in such unauthorized applications.
  Note: This content may contain offensive terminology that is now obsolete. Silicon Labs is replacing these terms with inclusive language wherever possible. For more information, visit www.silabs.com/about-us /inclusive-lexicon-project

Trademark Information

• Silicon Laboratories I  OS, Gecko OS  Studio, Precision32®, Simplicity ®, and others are trademarks or registered trademarks of Silicon Labs. ARM,
• CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of ARM Holdings. Keil is a registered trademark of ARM Limited. Wi-Fi is a registered trademark of the Wi-Fi Alliance. All other products or brand names mentioned herein are trademarks of their respective holders.
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References

• Silicon Labs
• Silicon Labs
• About Us - Silicon Labs
• Silicon Labs Community
• Internet of Things (IoT) - Silicon Labs
• Simplicity Studio - Silicon Labs
• Technical Support - Silicon Labs
• Overview - latest - Simplicity Studio 5 Users Guide Silicon Labs
• GitHub - DaveGamble/cJSON: Ultralightweight JSON parser in ANSI C
• Silicon Labs Community
• Bluetooth Low Energy (LE) Software Development Kit - Silicon Labs
• Bluetooth Low Energy (LE) Software Development Kit - Silicon Labs

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