Silicon Labs Bluetooth Stack Features for Lyra Devices

Answer

Feature	Description
Bluetooth SIG version	Bluetooth(BT) 5.2
Bluetooth features	BT 5.2 GATT caching BT 5 2M PHY BT 5 LE Long Range BT 5 advertisements (ADV) sets and scan event reporting BT 5 extended ADV/s Anonymous ADV Periodic ADV Extended ADV packet size: up to 1650 B Concurrent central, peripheral, broadcaster, and observer modes LE secure connections LE Privacy 1.2 (peripheral) LE packet length extensions LE dual topology Whitelisting (central side only) LE Power Control
Simultaneous connections	Up to 32 Simultaneous connections regardless of role (master or slave)
Maximum throughput	1300 kbps over 2M PHY 700 kbps over 1M PHY
Encryption	AES-128
Pairing modes	Just works, Man-in-the-Middle with numeric comparison and passkey Out-Of-Band
Number of simultaneous bondings	Up to 32
Link Layer packet size	Up to 251 B
ATT protocol packet size	Up to 250 B
Support BT profiles and services	All GATT based profiles and services are supported
Apple HomeKit	Apple HomeKit R15-complant implementation, which implements all Apple HomeKit profiles and services. The HomeKit SDK is available separately for Apple MFI licensees
Host (NCP) interfaces	4-wire UART with RTS/CTS control or 2-wire UART w/o RTS/CTS GPIO/s for sleep and wakeup power management
Wi-Fi Coexistence	Using Packet Trace Arbitration (PTA)
Bootloader	Secure Gecko Bootloader supporting authenticated and encrypted updates over OTA or UART and Secure Boot. The Gecko Bootloader also supports flash partitioning for both internal and external SPI flash types.
Non-volatile memory	NVM3