I want to use classic STP in ROS7 with hello = 1s, but I can't find this option. This value is between 1..10s, default 2s.
I didn't fount this in the documentation: https://wiki.mikrotik.com/wiki/Manual:S ... e_Protocol

Where can I find this item?

Look on this page:
https://help.mikrotik.com/docs/display/ ... geFirewall

Hello Time (and lots of other STP stuff) is a setting under Bridge Firewall, so it seems.

It's not good for me, because it is an input filter. I want to generate every seconds "STP hello" packets, because this network uses 1s hello time.

For example on Cisco:
configure
spanning-tree hello-time 1
exit