Sterling™-LWB+ WiFi 4 and Bluetooth 5.2 Modules
Overview
Laird Connectivity’s new Sterling™-LWB+ WiFi 4 with Bluetooth 5.2 module, based upon the Infineon AIROC™ CYW43439 chipset, is the latest member of the successful Sterling-LWB radio family. This embedded module series is available as a System-in-Package (SIP) and two certified module versions, supporting either an on-board chip antenna or a MHF connector for an external antenna. It is designed to meet the demands of medical and industrial IoT connectivity, and is mechanically and pin compatible with our Sterling-LWB module as an upgrade path for existing customers.
The Sterling-LWB+ contains a fully featured WiFi 4 radio, enabled with our industry-leading software drivers and support. The secure, high performance SDIO solution provides easy integration with any Linux or Android based system. It is designed for IoT from the start: fully certified, easy to integrate, and is the fastest route to the market for wireless IoT applications.
- Compatible: Our Linux Backports package supports many Linux kernels.
- Reliable: High quality drivers and extended product life support.
- Robust: Rich feature-set including 802.11b/g/n WiFi and Dual-Mode Bluetooth.
- Secure: Supports the latest WPA3 security standards.
- Industrial Temp: Supports -40 to +85°C industrial temperature operation
Register For a Chance to Win: Low-Power IoT Connectivity Modules with WPA3
Start prototyping your next IoT application today. Register for a chance to win one of four Sterling-LWB+ WiFi development kits.
The kits contain:
- Sterling-LWB+ DVK Board (chip antenna or MHF4 connector)
- 2.4 GHz FlexPIFA antenna (MHF4 version only)
- 10x jumper pin connector

Specifications
Bluetooth 5.2
21 x 15 x 4 mm (PCB Module)
HCI HS-UART, PCM (Bluetooth)
Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Additional Description | Bulk or Single | |
---|---|---|---|---|---|---|---|---|---|---|---|
453-00083C | Embedded Module | 802.11bgn, Bluetooth 5.2 | Linux | Hosted | Infineon CYW43439 | Antenna Trace | SDIO, HS-UART, PCM | 2400 MHz | 2400 MHz | Sterling LWB+, SiP Module | Bulk, Cut Tape |
Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Additional Description | Bulk or Single | |
---|---|---|---|---|---|---|---|---|---|---|---|
453-00083R | Embedded Module | 802.11bgn, Bluetooth 5.2 | Linux | Hosted | Infineon CYW43439 | Antenna Trace | SDIO, HS-UART, PCM | 2400 MHz | 2400 MHz | Sterling LWB+, SiP Module | Bulk, Tape and Reel |
Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Frequency Range (Min) | Frequency Range (Max) | Additional Description | |
---|---|---|---|---|---|---|---|---|---|
453-00084-K1 | Development Kit | 802.11bgn, Bluetooth 5.2 | Linux | Hosted | Infineon CYW43439 | MHF4 Connector | 2400 MHz | 2400 MHz | Sterling LWB+ Development Kit, MHF4 Connector |
Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Additional Description | Bulk or Single | |
---|---|---|---|---|---|---|---|---|---|---|---|
453-00084C | Embedded Module | 802.11bgn, Bluetooth 5.2 | Linux | Hosted | Infineon CYW43439 | MHF4 Connector | SDIO, HS-UART, PCM | 2400 MHz | 2400 MHz | Sterling LWB+, PCB Module with MHF4 Connector | Bulk, Cut Tape |
Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Additional Description | Bulk or Single | |
---|---|---|---|---|---|---|---|---|---|---|---|
453-00084R | Embedded Module | 802.11bgn, Bluetooth 5.2 | Linux | Hosted | Infineon CYW43439 | MHF4 Connector | SDIO, HS-UART, PCM | 2400 MHz | 2400 MHz | Sterling LWB+, PCB Module with MHF4 Connector | Bulk, Tape and Reel |
Product Type | Technology | OS/Software | System Architecture | Antenna Type | Frequency Range (Min) | Frequency Range (Max) | Chipset (Wireless) | Additional Description | |
---|---|---|---|---|---|---|---|---|---|
453-00085-K1 | Development Kit | 802.11bgn, Bluetooth 5.2 | Linux | Hosted | Chip Antenna | 2400 MHz | 2400 MHz | Infineon CYW43439 | Sterling LWB+ Development Kit, Chip Antenna |
Product Type | Technology | OS/Software | System Architecture | Chipset | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Additional Description | Bulk or Single | |
---|---|---|---|---|---|---|---|---|---|---|---|
453-00085C | Embedded Module | 802.11bgn, Bluetooth 5.2 | Linux | Hosted | Infineon CYW43439 | Chip Antenna | SDIO, HS-UART, PCM | 2400 MHz | 2400 MHz | Sterling LWB+, PCB Module with Chip Antenna | Bulk, Cut Tape |
Product Type | Technology | OS/Software | System Architecture | Chipset | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Additional Description | Bulk or Single | |
---|---|---|---|---|---|---|---|---|---|---|---|
453-00085R | Embedded Module | 802.11bgn, Bluetooth 5.2 | Linux | Hosted | Infineon CYW43439 | Chip Antenna | SDIO, HS-UART, PCM | 2400 MHz | 2400 MHz | Sterling LWB+, PCB Module with Chip Antenna | Bulk, Tape and Reel |
Photo Gallery
Certified Antennas
001-0014
FlexPIFA / FlexPIFA 6E Flexible Adhesive-Backed PIFA Internal Antennas001-0014: FlexPIFA antenna, 2.4 GHZ
Industry-first, flexible, planar inverted-F antennas for curved surfaces.
2.5-3 dBi gain.
Available in 2.4 GHz, dual-band 2.4/5 GHz and Wi-Fi 6E 2.4/5/6 GHz.
001-0015
FlexNotch 2.4 GHz AntennaFlexNotch is the only adhesive-backed, flexible notch antenna that can be easily custom-trimmed for maximum range within your specific enclosure. Linear polarization with a 2 dBi gain @ 2.4GHz frequency.
001-0030
mFlexPIFA Flexible Adhesive-Backed PIFA Internal AntennaFlexPIFA antenna for metal mounting with minimal detuning. 2.4 GHz and dual-band 2.4/5.5 GHz with 2 dBi of gain.
Become a Laird Connectivity Customer and Gain Exclusive Access to Our Design Services Team
- Antenna Scans
- Antenna selection and placement
- Custom antenna design
- Worldwide EMC testing / certifications
- Embedded RF hardware / firmware design
- Cloud architecture and integration
- Mobile application development
- Product & Industrial Design
Documentation
I have a Ubuntu system that has automatic updates will this affect my Wi-Fi?
Yes as new kernels are updated in Ubuntu automatically it will break backports and will need to be reinstalled.
What are some disadvantages of using AP+STA?
The AP and STA are on the same channel potentially causing disconnections if the STA roams to a different AP. The Sterling-70 has the advantage of dual independent radios that can run on different Wi-Fi channels.
What versions of Android are supported by Laird Wi-Fi modules?
This can be found by reviewing the release notes for the specific product on GitHub.
- LWB, LWB5, LWB5+ - Sterling-LWB-and-LWB5-Release-Packages
- Sterling 60 - Sterling-60-Release-Packages
How will Laird handle the FRAG attack announced by Wi-Fi Alliance in 2021 May?
Please refer this blog as below. Laird are currently investigating these issues internally and investigating with the chipset vendors and our internal QA team to establish test scenarios to evaluate the impacted devices.
https://www.lairdconnect.com/resources/blog/frag-attack-wi-fi-putting-pieces-back-together
Can I use VOUT_3P3 to power VDDIO?
No, if VBAT is 3.6V or greater, this power source should be used for VDDIO_RF, and USB2_AVDD33 if strapped for USB. Otherwise leave this pin disconnected.
What is the MCS index for Wi-Fi?
MCS stands for Modulation Coding Scheme and is an industry metric index based on Wi-Fi connection parameters between a client and wireless access point. These parameters include modulation type, coding rate, spatial streams, channel width, and guard interval.
Can I use a Laird WiFi module on Ubuntu?
Laird modules can be used on a Ubuntu system with a kernel version that is supported by Laird backports.
To check, find the kernel version of the Ubuntu system and then check the release notes of the products to see if the latest backports supports that kernel.
Is there a way to extend the shelf life of Laird modules?? If the shelf life cannot be extended in any way, what are the consequences of using modules after shelf life?
The shelf life statements are essentially to prevent mishandling of the product and not storing it properly. If the modules are still sealed in the package, stored at the proper temperature and have not been exposed to moisture they should be fine. However, when working with modules beyond their shelf life you MUST bake the modules before populating the them to your board. Failure to bake the modules could result in the yield rate dropping down lower than expectation due to popcorn or de-lamination on the modules. It is recommended that you follow IPC/JEDEC J-STD-033 which is the general standard for the handling, packing, shipping and use of moisture/reflow sensitive surface mount devices.
Our main concern is around the castellation/pads which solder the module to the board. It is imperative those pads do not get tarnished, as this would cause soldering issues. Humidity can affect solderability as well, as if there is any excess moisture in the solder on the module, during reflow of the module to the board, steam balls can essentially explode the solder and sometimes result in an open circuit (or possibly a short circuit).
As long as all of the moisture handling and temperature guidelines are being followed you will likely have no issues. It is further recommended that when you do the build with modules that have exceeded their shelf life that you start with a handful to perform a test run and do a final test to make sure all is working as expected. As long as there are no issues with the initial test run we would expect that you will not experience any problems.
How to set regulation domain in LWB/LWB5/LWB5+ with latest release 8.5.0.7 and later release in Linux platform?
(1) By option regdomain
/etc/modprobe.d/brcmfmac.conf # Sample contents of a brcmfmac.conf file configured for operation in # the United States options brcmfmac regdomain="US"
(2) By device tree
@mmc0 { #address-cells = <1>; #size-cells = <0>; bus-width = <4>; non-removable; brcmf: wifi@1 { reg = <1>; compatible = "brcm,bcm4329-fmac"; laird,regdomain = "US"; }; };