Laird Connectivity Lyra Series BLUETOOTH® 5.3 Modules

Laird Connectivity Lyra Series BLUETOOTH® 5.3 Modules, based on the Silicon Labs EFR32BG22 SoC, provide a turnkey solution for adding Bluetooth wireless connectivity to any application. The Lyra Series Modules feature low-power operation, making them ideal for battery-powered devices. These devices also come with fully upgradeable, robust software stacks, worldwide regulatory certifications, advanced development and debugging tools, and support that will minimize and simplify the engineering and development process, helping to accelerate time-to-market.

The Laird Connectivity Lyra Series Bluetooth 5.3 Modules are available in compact PCB (LYRA P) and SiP (LYRA S) form factors. Both devices feature an integrated antenna. The LYRA S SiP Module also supports an external antenna via trace pin.

Firmware Options

The Lyra series supports three different firmware options for software development:

  • AT Command Set: Fully featured and extensible to suit any developer’s needs
    • Proven over 5+ years
    • Basic Bluetooth LE cable replacement
    • Simplest implementation possible
    • Includes all key features of Wireless Xpress and more

  • Wireless Xpress:  Frozen at the current release; An ideal path for existing Silicon Labs customers
    • Basic Bluetooth LE cable replacement
    • Secure FOTA capable FW
    • Xpress command API for iOS and Android

  • C Code: Full software development with Silicon Labs SDK and Toolchain
    • Native C code development
    • Use Simplicity Studio IDE
    • Full functionality of Silicon Labs HW / SW


  • Bluetooth 5.3
  • Bluetooth mesh Low Power Node
  • Antenna options
    • LYRA P: Integrated antenna
    • LYRA S: Integrated antenna or RF pin
  • TX power
    • LYRA P: Up to 8dBm
    • LYRA S: Up to 6dBm
  • BLE RX sensitivity at 1Mbps
    • LYRA P: -98.6dBm
    • LYRA S: -98.6dBm
  • 32-bit Arm® Cortex®-M33 core at up to 76.8MHz
  • 512kB/32kB of Flash/RAM memory
  • Wide range of MCU peripherals, including UART, I2C, SPI, ADC, GPIO, PWM, PDM, Counter, Timer, Watchdog, and PRS
  • GPIO
    • LYRA P: Up to 24 GPIO pins
    • LYRA S: Up to 25 GPIO pins
  • -40°C to +105°C operating temperature range
  •  Dimensions
    • LYRA P: 12.9mm x 15.0mm x 2.2mm
    • LYRA S: 6.0mm x 6.0mm x 1.1mm


  • Asset tags and beacons
  • Portable medical devices
  • Sports, fitness, and wellness devices
  • Connected homes
  • Industrial and building automation
  • Bluetooth mesh low power nodes
  • Industrial IoT sensors
  • Smart lighting


Block Diagram (LYRA P)

Block Diagram - Laird Connectivity Lyra Series BLUETOOTH® 5.3 Modules

Block Diagram (LYRA S)

Block Diagram - Laird Connectivity Lyra Series BLUETOOTH® 5.3 Modules
Published: 2022-03-11 | Updated: 2023-03-08