Power Cycle MiniServer If Offline

[Paul Watkin]

Hi all,

I have a situation with a Miniserver where it is either loosing connection to the network or sometimes on boot up not initialising the network connection, therefore I need to be able to use the ping block to check connection status.

Loxone have suggested using https://www.loxone.com/enen/kb/automatic-router-reset/ which is designed to restart an internet router if it freezes up - my concern is whether the fact that as the Miniserver is the item being switched off it is going to derail the logic somewhere?

I am going to implement the physical side of this slightly differently in that the Loxone Relay will drive the coil of a Normally Closed time delay relay which will keep the power off for 10 seconds to allow the power in the psu to dissipate before allowing the Miniserver to reboot.

Can anyone see an issue with this? This is going to be a temporary fix whilst we investigate some other causes for this issue.

Regards

Paul

[Jonathan Dixon]

Rather than hard power off maybe start off with a soft reboot? 

An http virtual output to

http://user:pa...@127.0.0.1/dev/sys/reboot

should do it (haven't tested) obviously using a user:pass that has permission to do reboots 

I'd hope this is a little kinder on the SD card than hard powering it off on a regular basis. But even so root-causing the actual issue sounds priority 

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[Paul Watkin]

Hi joth,

Thanks for the reply but unfortunately I have already tried the soft reboot option and that is what manifests the issue, hence having to resort to the full power off, this happens a few times a year typically when I soft reboot the system doing an update or when we do updates to the network switch firmware and it loses a network connection.

It may be that we need to replace the Miniserver but that is under discussion.

I have a suspicion that the code as is wont work as it will leave the relay energised when the Miniserver turns off and won't de-energise until the MiniServer has rebooted - the way round it I think is going to be using a Single shot relay which I am currently struggling to source locally - but that is tomorrows problem now!!

Paul

[Jonathan Dixon]

On Tue, 16 Dec 2025 at 19:49, Paul Watkin <pa...@watkinworld.co.uk> wrote:

Hi joth,

Thanks for the reply but unfortunately I have already tried the soft reboot option and that is what manifests the issue, hence having to resort to the full power off, this happens a few times a year typically when I soft reboot the system doing an update or when we do updates to the network switch firmware and it loses a network connection.

It may be that we need to replace the Miniserver but that is under discussion.

I have a suspicion that the code as is wont work as it will leave the relay energised when the Miniserver turns off and won't de-energise until the MiniServer has rebooted - the way round it I think is going to be using a Single shot relay which I am currently struggling to source locally - but that is tomorrows problem now!!

Make sure none of the logic that feeds the relay output has Reminiscence enabled (for those blocks that support it anyway), and the relays will reset to 'off' during the reboot and stay that way anyway

 It's very hard to see the logic in the resolution image posted, but I think the Start Pulse leading the Miniserver reboot memory flag is entirely spurious if the chain above (leading to Reset mem flag) have no reminiscence.

(Aside: having reminiscence on in that chain would be bad idea as it will race a write to SD card exactly as the power is being yanked out of it)

Have you looked at putting the NC relay on the DC supply to the Miniserver, rather than the AC supply to the PSU? It will avoid the need to wait for the capacitor drain

Paul

On Tuesday, 16 December 2025 at 19:38:28 UTC Joth wrote:

Rather than hard power off maybe start off with a soft reboot? 

An http virtual output to

http://user:pa...@127.0.0.1/dev/sys/reboot

should do it (haven't tested) obviously using a user:pass that has permission to do reboots 

I'd hope this is a little kinder on the SD card than hard powering it off on a regular basis. But even so root-causing the actual issue sounds priority 

On Tue, 16 Dec 2025, 18:34 Paul Watkin, <pa...@watkinworld.co.uk> wrote:

Hi all,

I have a situation with a Miniserver where it is either loosing connection to the network or sometimes on boot up not initialising the network connection, therefore I need to be able to use the ping block to check connection status.

Loxone have suggested using https://www.loxone.com/enen/kb/automatic-router-reset/ which is designed to restart an internet router if it freezes up - my concern is whether the fact that as the Miniserver is the item being switched off it is going to derail the logic somewhere?

I am going to implement the physical side of this slightly differently in that the Loxone Relay will drive the coil of a Normally Closed time delay relay which will keep the power off for 10 seconds to allow the power in the psu to dissipate before allowing the Miniserver to reboot.

Can anyone see an issue with this? This is going to be a temporary fix whilst we investigate some other causes for this issue.

Regards

Paul

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