May 2026 performance summary for apache/nuttx focused on stabilizing timekeeping and reducing latency risk in time-based scheduling. Implemented a monotonic timekeeping fix in current_usec to prevent 32-bit microsecond overflow, improving reliability of sleeps and watchdog timeouts across 32-bit builds. The fix preserves behavior for 64-bit builds and aligns with CONFIG_USEC_PER_TICK=10000.

January 2026 monthly summary for apache/nuttx. Delivered a targeted fix to the timer subsystem for NRF52/53/91 architectures, addressing a timer timeout overflow that could result in zero-valued timeouts when NRF52_TIMER_PER > 1,000,000. The patch updates macro definitions and timeout calculations to ensure correct, non-zero timeout values across NRF variants. This change improves timer reliability for time-critical tasks and reduces potential scheduling anomalies in embedded deployments.

November 2025: Focused on stabilizing I2C communications for NRF-based ARM platforms in Nuttx. The key deliverable was a targeted I2C bus stop-condition fix to prevent bus hangs during multi-byte transfers, ensuring the STOP is issued after the last byte is read or written. This fix enhances reliability of peripheral and sensor communications across NRF52/NRF53/NRF91 devices, reducing production incidents related to I2C stalls.

This month focused on delivering practical BLE capabilities in the Nuttx Apps repository to accelerate BLE feature prototyping and testing within embedded projects. Delivered new NimBLE-based BLE demos and established reusable examples that demonstrate both central and peripheral roles within Nuttx, paving the way for faster development and validation of BLE features across projects.