ros wds only can relay it?

ros wds only to relay, so why not do the same with DD-WRT universal relay. Such compatibility bad, wifi with other brands simply can relay up.

It is not clear what you wanted to say.

You must use always devices of the same brand for this.
Devices from different brand may not communicate with each other.
Stay with the same brand for this.
As Jarda says.
Be clear with what you want.
Clear explanation is desired for a correct answer.