Hi,

I'm not a fan of using Static IP (where the IP is manually configured on the device itself), it can work however, you must manually ensure (and document):
- The IP address is unique
- It is outside of the DHCP pool that the router can select from (to avoid IP conflicts with DHCP assigned IPs).
- If the device is connected to a LAN that has a different subnet access is not possible (eg. a new router or different location).

DHCP Reservation, this is my prefered option:
- The IP address is maintained automatically by the router
- It is always unique
- If the device is connected to a LAN that has a different subnet access is still possible as the new router will assign it a correct IP.

The end result of either method is the same: The IP used by the device will be consistent.

Regards
Carl