Most routers provide the feature to give a unit receiving an IP address via DHCP a fixed IP. This is the preferred way to avoid changing IPs of certain devices in the LAN and to also keep it working when the router changes and the new router defines a new class C network. When you have the IP statically set inside the Meteobridge, then it will fail in the "router changes" situation. When the Meteobridge stays at DHCP it will instantly work in the new setup, but of course it will need you to find the new IP it received from the new router.
Doing so will give you best of both worlds: Fixed IP but also flexibility to have it instantly working in new DHCP setups.