For anyone planning to update firmware on the MR60FDA2 or MR60BHA2:
I’ve reverse-engineered the MR60BHA2 and the underlying HiLink radar. Seeed Studio’s manuals were very helpful.
In any case, I can confirm that you should not flash an MR60FDA2 with the MR60BHA2 firmware, and vice versa. The hardware differs (the ADT6101P chip is configured differently).
I also wrote a cross-platform Python utility that simplifies firmware updates:
[github_com]/SergeyZh/hlk-ld6002-adt6101p-internals/blob/main/docs/firmware-update.md