I’ve got a new Raspi 4 (name in router: raspberrypi) on which I run a rather simple software (openwb;) and an old Raspi 3 (name in router: openhab) on which I run openhab and node-red.
At the moment the Raspi 3 seems sufficient, but in the future with additional smarthome features it might become too slow. So I’d like to switch:
Raspi 4 → openhab, node-red, …
Raspi 3 → openwb
First I thought I just needed to exchange the sd-cards but that didn’t work. So now I exchanged the ports too (Router: FritzBox 7490) so that the Raspi 3 got the former IP of the Raspi 4 and vice versa.
That’s no problem with openwb / Raspi 3, which now runs fine under the former openhab-IP. However, the Raspi 4 with openhab is not recognized in the router (and of course I can’t access openhab via browser). What I have now in the router is a few devices called “raspberrypi” which are listed as “unused connection”.
Of course, I could just revert the process (exchange SD-cards and IP-addresses) but in the long/medium run it wouldn’t work that well.
Do you have any idea what I should do/try?
Did you select statis IPs on one of the raspberrys?
Or did you tell the fritzbox to assign always the same IP to one of both?
The problem you’re facing could be cause by a IP adress conflict
Keep in mind that DHCP is based on the MAC ADress - that means changing the SD card won’t make a difference. If configured the hardware always gets the same IP assigned since the MAC does not change
Hi Sascha,
the IPs are static / I assigned them permanently.
I didn’t think about the MAC address (and don’t know much about them). So what should I do, exchange the MAC-addresses as well?
Well, the MAC is hard coded in the network chip of your RasPI. So changing the MAC is not an option.
I understand that you’ve set a static IP on the RasPI directly. So the better way would bd:
Set both systems to DHCP and let your fritz.box assign always the same IP from te DHCP pool like shown in the screenshot here:
I hat the IP-addresses assigned like Sascha proposes from the beginning, but that leads to the problem I described / doesn’t help.
If I follow Bernd’s advice and link and consider that I’m not really familiar with Raspis and network protocols: I shouldn’t exchange the cards.
So where does that leave me?
Option 1: leave openhab on Raspi 3 and hope there won’t be any performance problems in the future
Option 2: create a new SD card. But how do I do that if I want to keep my openhab and nodered settings?
Thats basicly how you should be doing the backup/restoring using the backup runtime build into OH.
However, I once tried this, and though everything was restored as it should, I ran into issues when I tried entering Karaf console… Still dont know why or what happened, but it refused my login credentials.
I have no idea of you node-red rules. I doubt they´ll be backup´d.Like databases (InfluxDB and Grafana) will not get backup´d.
As for your text configuration files if any, I would suggest you do a manual backup of these (sitemaps, items, things etc).
I did the “hassle free” setup with openhab a few weeks ago. Since it includes the operating system it’s probably the latest one. But I plan to install the new card with the 'hassle free" setup again, so it should be the same operating system version and thus not be a problem (I hope).
