Bosean FS-600: Cannot load firmware

[kroftjan]

I successfully loaded RadPro version 2.0beta23. Now I'm trying to load new fixed version. When I connect the board to a Win 10 PC via SWD using ST-Link V2 clone over USB2.0, the device boots up to instantaneous measurement screen (doesn't show any readings though). When I run st-info --probe on the host PC, stlink programmer is found (version and serial are displayed), but the device reboots and flash, sram and chipid all read 0 and dev-type is unknown. Previously, I used the same setup to successfully load RadPro. I tried to do this on a different PC with same result. Is there any key combination to enter "bootloader" mode on FS-600? Thanks for any advice.

[kroftjan]

Okay, finally I got it. I was intermittently able to get st-info --probe information by holding OK/Power button while the device was connected to the PC. It was still going through its reboot loop, but after few tries I was able to backup existing firmware with st-flash read and after that I even risked writing new firmware like this, and again, after few tries with OK/Power button pressed the load process commenced and finished successfully.