sorry, completely forgot...
Primary router is a Fritz 3370 with internet access via pppoe. Second one would be an Archer C50 v1.
Both with wifi. They both shall be access points for clients like smartphones. And thy are running a self build OpenWRT 19.07.3.
Kernel version: 4.14.180
batman version: openwrt-2019.2-7
batctl version: openwrt-2019.2-4
I intend to maybe add Fritz 7412 and w8970 v1 later.