Bluetooth Core 6.2 introduces shorter connection intervals for low-latency HID.

Bluetooth Core Specification 6.2 is dated November 3, 2025. Bluetooth SIG’s feature overview lists Shorter Connection Intervals first: it reduces the Bluetooth LE minimum connection interval from the historical 7.5 ms to 375 us and provides a finer 125 us resolution.

Shorter intervals allow the link to exchange data faster, which fits high-performance HID, real-time HMI, gaming peripherals, AR/VR controllers, and real-time sensing. The specification also adds new Link Layer control PDUs, HCI commands and events, and a mechanism for flushing stale ACL data so old packets do not block fresh traffic.

Version 6.2 also strengthens Channel Sounding security by detecting and mitigating amplitude-based attacks. It standardizes HCI USB LE Isochronous Support to improve USB HCI transport for isochronous data such as LE Audio, and LE Test Mode Enhancements add more flexible OTA support for RF testing.

For wireless peripheral solutions, low latency is not guaranteed by the protocol version alone. Chip support, host-system support, receiver design, firmware scheduling, antenna conditions, power noise, and PCBA layout all affect response. Projects should define latency targets, power targets, and compatible platforms clearly at the beginning.

For keyboards, shorter connection intervals mainly affect matrix scanning, key combinations, macro triggering, and gaming input response. Firmware needs to coordinate scan cycles, debounce logic, key-report queues, Bluetooth connection events, and power-saving strategy; otherwise shorter intervals can be offset by scan delay or task scheduling.

For mice, low-latency links must also work with sensor frame rate, DPI processing, wheel and button events, 2.4 GHz dongle protocol, USB polling rate, and battery modes. High-polling products need clear switching between performance and battery modes, with RF interference and power transients controlled on the PCBA side to avoid jitter, packet loss, or slow wake-up.