Particle Tools Changelog

November 14th 2022: Device OS v4.0.1

Note: This is a Release and may be used for production. This is the second Release in the Device OS release 4.x line (LTS) with critical bugfixes and backports from 5.x release line

To learn more about LTS release line, read our blog post.

You can view information about Device OS versions, upgrades and downgrades here.




  • [wiring] ApplicationWatchdog: fixes potential 2x timeout required to fire #2536
  • [gen3]Fix BLE control request channel sending malformed packets #2538
  • Fix issue with platform_ncp_get_info(0) for quectel platforms #2532
  • Secures DCT initialization from getting interrupted between creating DCT file and filling it with 0xff to default state #2530
  • [Boron / B SoM] R410 PPP crash in network phase workaround #2571
  • [Cellular] R410 initialization SIM failure workaround #2573

… and other bugfixes and improvements!

:star2: Be sure to read the full collection of release notes Particle Device OS Updates Thread.