I have Amps controlling my speakers in my yard. 3 of them to be exact. Fire pit, BBQ, and Porch. When I’m sitting around the fire or a little further out my Wi-Fi signal weakens and I have trouble controlling Sonos from my phone. The amps are close enough to Router and speakers are hardwired so that’s not the issue. It’s simply volume, music, zone, etc. I cannot change them because my phone struggles on the Wi-Fi. Any thoughts, ideas, apps that connect directly to Sonos?