First time I am using XBEE modules, I have few questions about pcb
1.- if analog I/O unused, VREF pin must be connect to VCC or can be left open ?
2.- Also for u.Fl version must be created the keepout area (user manual 90001500 pg.24) ?
3.- Poligon pour under the module must be float or can be connect to GND (user manual 90001500 pg.153)? I must only create the copper keepout region under RF pads.