Iām about to jump into this rabbit hole. Are the folks above saying that the solution in post #2 from about 6 months ago is no longer working? Firmware bug?
Still working. Did it today.
1st SLZB-06 as coordinator on first floow
2nd SLZB-06 as repeater (router) on second floor
2nd connected to first as a device.
takes one or two minutes, and all devices which where previously connected to coordinator but with very bad connection (0-5lqi) on the second floor now have 50-60lqi)