I have a complete openhabian Image containing openhab2, homebridge and some tools on my RPI 3b+. Now I bought an RPI 4. Is it possible just to swap the cards and the RPI 4 will boot?

Just swapped the cards from the running RPI3b+ to RPI4b and it works… ok…the ip was different and I had to change the IP´s from amazon-dash buttons…but it worked from Openhab over homebridge till Homekit.. I advise to try it out

openHAB Community

[SOLVED] From RPI3+b to RPI 4

Setup, Configuration and Use Installation

Bruce_Osborne (Bruce Osborne) January 1, 2020, 10:50pm 6

It MAY work but I would tend to look for people on a Pi forum that have moved their card like that.
I do not know the architectural differences that require the newer OS.

RPI4 Openhab migration from RPI3