HiLink Ld2410b initial configuration

This not (yet) Home Assistant related, but hopefully someone here has experience.
I am trying to test out some LD2410b. Powered it up with 5V DC. Started HLKRadartool on my phone (ios). HLKRadartool finds the LD2410b, the default password should be “HiLink”, but it does not seem to work.


what am I missing?

Do I need to initialize it somehow? Is it not usable via BLE straight out of the box?