2.00 - 2026-10-30
- Standalone Recording: save mono 16-bit WAV to microSD, with timed or continuous
sessions, automatic file splitting, optional start after power-on, free-space/time
estimates and Stop & save. Streaming remains a separate mode; Listen works in both. - SD hardware: external SPI modules on C3/S3/C5/C6 (Adafruit BFF #5683), plus
Sense's built-in slot. AtomS3U remains Streaming-only. Improve SPI ready/busy handling,
buffer allocation and WAV finalization; preserve partial files on errors. - Field power: turn Wi-Fi off while recording, then sleep when the offline session
ends. Reconnection requires reset or power cycling. Optional low-battery stop/save
and sleep; voltage monitoring and calibration, with C5's built-in divider. - Device configuration: new setup wizard, board/startup-mode selection, tested
home Wi-Fi credentials, protected direct access and offline recovery access point.
Add C6 internal/external antenna selection. - Logs: bounded RAM history, paging/download and optional persistent rotating SD
journal; Normal/Detailed levels. PSRAM-aware buffers retain internal audio headroom. - Time and protection: confirm real SNTP responses and retry pending synchronization;
coordinate Recording with thermal shutdown/recovery, OTA and definitive session ends. - Documentation: beginner-focused two-mode guide, board/storage matrix, field workflow,
battery estimates, card capacities and linked parts. Recommend C5 + PDM for new builds. - Validation: C5 completed a 9 h 6 min SD session with ten finalized WAV files and
no observed recording drops or new I2S/DMA errors. This is not multi-day battery
qualification. Sense and other boards' SD paths still require physical validation.
See the release notes.