Device OS v5.3.0 contains hardware watchdog support, static IP configuration support, and bug fixes for the P2.

On Gen 3 devices (Argon, Boron, B Series SoM, Tracker SoM, Tracker One, Monitor One, E404X) and the P2 and Photon 2, you can now enable the hardware watchdog in the MCU (nRF52840 or RTL8721). This is significantly more effective than the application (software) watchdog, and does not require external hardware. The documentation is in the Device OS API reference

Full release notes can be found here.