I have connected my ESP32 to my local wifi network and when I do nmap -sP 192.168.1.1/24 from another computer I can see them with connected with IP address 192.168.1.105. When I try to add them via the WLED app on my Iphone says Found HallLEDs (an esp32 that is already set up ) and 2 other lights! – one is my iphone and the other is the new ESP32. When I hit the back button only the listing for HallLEDs shows up. Then I tried to manually set them up since I know the IP address. When I do so the lights show in the WLED app as (New Light) 192.168.1.105 (Offline) and when I click on it I get: Device Unreachable. Any help would be greatly appreciated.
Make sure the device is not too far from your router. It may be losing connection.