Arduino nano and Xbee 3 on a PCB. button and relay wireless signal circuit

I designed a PCB for Xbee and Arduino and made it myself. The Xbee and Arduino on the breadboard which you can't see properly in the video sends a package whenever a button is pressed or light is shined on the ldr. The output Xbee picks up the package and asks the arduino to turn on the LED which is connected to a relay.