Configure bridge for tor in openWrt 18.06


Need help setting up a bridge for tor in openWrt 18.06
using obfsproxy.

obfs4proxy is only for openWrt 21.
Is it possible to transfer it to openWrt 18?

I apologize for the message: English is not my native language. I use translator.

Maybe its easier to install 21 on your (which?) hardware...

I'm using openWrt 18.06.1
I wouldn't like to reflash the tl-mr3020 - a lot is configured on it.

What other way can I start tor using obfs?