2025-11-25 : Release candidate 3 for version 4.2 of Lumitec poco FW+UI
    * OTA file: "poco-fw-ota_4p2-rc3.bin" - MD5: cb54b4bf64b786e91ecdc76059d1bd4f - CRC32: 10cd121c

Poco FW Changes from 4.2-rc2 to 4.2-rc3:

* Bugfix: Poco service advertisement for Navico MFDs was broken in 4.2-rc1.

Poco embedded WebUI 4.2.6:

* No changes.

2025-09-18 : Release candidate 2 for version 4.2 of Lumitec poco FW+UI
    * OTA file: "poco-fw-ota_4p2-rc2.bin" - MD5: 72b42c98be7662ea60ef988782b3841e - CRC32: 7bed7eb4

Poco FW Changes from 4.2-rc1 to 4.2-rc2:
* minor tweaks to pocofx and s2l
* Batch programming script checks for presence of all required bin files.

Poco WebUI Changes from 4.2.5 to 4.2.6:
* Decimal point didn't show up on iOS for static IP address form.

FW Changes from 4.2-b2 to 4.2-rc1:
* Fixed remaining NMEA 2000 Certification Test Tool failures. All tests are now passing.
* Improved CAN driver for better detection of bus disconnected. And silence console spam when CAN disconnected.
* Bugfix NMEA2000: Add missing field 9 in 130330 Lighting System Settings PGN.
* Bugfix NMEA2000: Increase CAN tx and rx buffers to better handle burst traffic as seen in customer test scenario.
* Bugfix: Patched IDF i2c driver to clear unhandled interrupt that causes Interrupt WDT timeout and crash.
* Bugfix: fixed PLI api function hex2 for sending sequential messages. Fixes PLI setgroup hidden feature.
* Implemented some missing APIs over BLE. Fixes factory restore via BLE.
* Bugfix: Fixed memory leak in cgi_light_control for APIs /v4/vsw & /v4/lg.
* Bugfix: getReadAccess() failed sometimes.
* Bugfix: Fix out of memory issue by reducing internal heap usage of FreeRtos tasks. Use Freertos timer instead of own task for some utilities.
* Added memory monitor task to periodically output memory statistics and watch for low-memory condition.
* Added esp_task_wdt_isr_user_handler to reboot if a Task WDT trips repeatedly. This will (not gracefully) recover from a live-lock condition.
* Audited and fixed several memory safety issues throughout the code-base.

WebUI Changes from 4.2.4 to 4.2.5:
* Implemented read/write Ethernet settings via BLE.
* Implemented Factory Restore via BLE.
* Improved switch state updates via BLE.

4.2-b2 BETA testing release! Changes since 4.2-b1:

FW Changes:
Disable N2K binary switch bank feature by default because it can conflict with other systems.
Persist user changes to N2K installation labels.
Bugfix Switch TEST button.

WebUI Changes:
Default config has an action with id=0.

4.2-b1 BETA testing release! Changes since 4.2-a0 and 4.1-rc8:

FW Changes:
More NMEA2000 fixes for certification. (still WIP)
T2HSB fix for when it would not send command if given H&B or S&B
Other misc. bugfixes.

WebUI Changes:
Modifying Poco config queues up changes and displays "Apply" "Cancel" button banner.
skip rate-limiter on save config.
(Re)implemented switch Test button.
Moved Wired Interface settings to own modal.
Added tooltips for
Resolved 64-app-newer-than-fw-causing-config-save-errors
Other misc. bugfixes.