I recently purchased a R4S router and installed OpenWRT on it plus added two RE603x access points hardwired to my to network via a few TRENDnet unmanaged switches. After doing all of this, I realized that I can't figure out how/if I can setup a guest wifi network using the equipment that I have and was hoping someone from this forum may have some suggestions.
After doing some research, I think I either need to purchased a managed switch or repurpose an old router and use it like a managed switch. Are there any options that I'm not thinking of?