This is the first release candidate of the 3.7 firmware line. It completes the phase stepping work started in the betas and fixes issues found during the beta cycle. Upgrade notes and change list are at https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x-RC#reprapfirmware-370-rc1.
The M955 accelerometer configuration has changed and probe type P3 is no longer supported, so please read the upgrade notes before installing.
For WiFi equipped boards the recommended WiFi firmware version is 2.4.1 available at https://github.com/Duet3D/WiFiSocketServerRTOS/releases/tag/v2.4.1.