Laird Connectivity Lyra 24 Series BLUETOOTH® Modules

Laird Connectivity Lyra 24 Series BLUETOOTH® Modules are Bluetooth Low Energy (BLE) modules based on Silicon Labs EFR32BG24 SoC. These modules offer Bluetooth low-energy connectivity, delivering exceptional RF performance and energy efficiency, future-proofing capabilities, and industry-leading Secure Vault® technology. The Lyra S4 Bluetooth modules come with a 32-bit Arm® Cortex®-M33 core with DSP instruction and a floating-point unit. These modules function at 2.4GHz radio frequency and feature 1536kB Flash and 256kB RAM. The Lyra 24 modules operate at a 1.8V to 3.8V supply voltage range and a -40°C to 105°C temperature range. Typical applications include smart home devices, lighting, gateways and digital assistants, and industrial IoT sensors.


  • Bluetooth low energy 5.3
  • Bluetooth mesh connectivity
  • Built-in antenna or RF pin
  • Based on Silicon Labs EFR32BG24 chipset
  • 32-bit Arm Cortex-M33 core
  • Vault high or vault mid security
  • Rich set of analog and digital peripherals


  • Professional lighting
  • Smart home devices
  • Asset tags and beacon
  • Building automation and security
  • Secure medical peripherals
  • Gateways and digital assistants
  • Industrial IoT sensors


  • 2.4GHz radio frequency
  • Widest range of MCU peripherals
    • UART
    • I2C
    • SPI
    • ADC
    • GPIO
    • PWM
    • Counter
    • Timer
    • Watchdog
    • PRS
  • Bluetooth Low Energy (BLE)
    • Support peripheral/central roles
    • Support for 2 Mbps, 1Mbps, and 125kbps coded
    • Support for AoA/AoD, Bluetooth LE mesh (C code path only)
  • Powerful Cortex-M33 Core
    • 1,536kB Flash
    • 256kB RAM
  • -40°C to +105°C extended industrial temperature range
  • 1.8V to 3.8V supply voltage range
  • Dimensions
    • Lyra 24P: 12.9mm x 15mm x 2.15mm
    • Lyra 24S: 7mm x 7mm x 1.18mm
  • FCC, EU, UKCA, ISED, RCM, MIC, KC, and Bluetooth SIG certifications


Published: 2023-05-24 | Updated: 2023-09-27