Quote gloomyandy
@fenixsz, you will almost certainly get more help if you use the LPC discord server (see the LPC Wiki for details). The M911 command you are trying to use requires that the main board is able to monitor the supply voltage, the BTT SKR boards do not have that feature. When using the BTT UPS it sends a trigger value to the board and it may be possible to configure RRF to use this trigger, but it is not something I've tried nor have I seen any posts from users that have done this and have it working. You should probably ask this question again on the discord server.
Thanks!
Edited 1 time(s). Last edit at 09/02/2020 03:15AM by fenixsz.
