January 2026 monthly summary for libsdl-org/SDL: Delivered gyro stutter mitigation for Horipad Bluetooth controller by implementing a simulated sensor timing approach and tuning IMU update rates based on wired vs wireless mode. Fixed gyro stability issues caused by dropped Bluetooth packets, resulting in smoother motion input and improved user experience. Across sensor timing modeling and mode-aware updates, the work enhances reliability for Bluetooth controllers and demonstrates practical SDL sensor backend optimization.

July 2025 monthly summary for shadps4-emu/ext-SDL: Delivered calibration enhancements and noise-threshold improvements to IMU and gamepad gyro calibration, resulting in more robust and accurate motion sensing in emulation. Refactored calibration flow to prioritize accelerometer tolerance before gyro drift; introduced a centralized accelerometer noise threshold constant to replace hardcoded values; fixed a build error caused by a commented-out line. These changes improved reliability, reduced calibration variance, and simplified future tuning through clearer constants and documentation.

June 2025 focused on strengthening IMU data integrity and controller interoperability within shadps4-emu/ext-SDL. Deliveries centered on enhanced IMU visualization/instrumentation for testing, dynamic polling-rate handling across multiple controllers, and alignment of IMU data rates with hardware behavior. The work improves data reliability for SDL backend validation, accelerates debugging, and broadens cross-device support.

Concise monthly summary for 2025-05: In shadps4-emu/ext-SDL, delivered a gyroscope configuration and scaling fix for 8bitdo controllers, standardizing the sensor polling rate and updating the gyro scale calculation to reflect the new maximum range, ensuring accurate rotational data across devices. This work improves input accuracy, emulation fidelity, and cross-device consistency, reducing controller-related issues in gameplay experiences. Commit reference: a26e5f32e0f553379f9c15a1902d52a38953f148 ("Gyro degrees per second is 2000 across all 8bitdo controllers (#13147)").

April 2025: Focused work on stabilizing IMU input for the 8bitdo Bluetooth controller within the SDL emulation layer (shadps4-emu/ext-SDL). Implemented a precise IMU timing/orientation fix and refactored sensor timestamp handling to reflect the controller's internal clock. Calibrated accelerometer/gyroscope scaling and coordinate mapping to SDL conventions, significantly improving motion input reliability and accuracy in emulated gameplay.