SL3 Pro: do not disconnect Wifi when Nuki Cloud is unreachable, breaking local MQTT and other protocols

[lukastribus]

Product name

Smart Lock 3.0 Pro

Summary

Nuki SL 3.0 Pro should not disconnect Wifi when Nuki Cloud is unreachable, as this will break local connection (local API, MQTT, etc).

Features

Do not disconnect the Wifi due to unreachable Cloud Servers

Reason

Nuki SL 3.0 Pro is “health checking” the Wifi by connecting to the Nuki Cloud servers. If the Nuki Cloud Servers are not reachable, for example because:

• there is a problem with the local Internet Connection
• there is a problem with the Nuki Cloud
• Internet Access is not allowed for the nuki device (firewalled or airgapped).

More details in the discussion:

Local MQTT connection fails there is no connectivity to Nuki Cloud Servers

Hello, I have a Nuki 3.0 Pro, it connects to a MQTT Server on my local LAN, which is talking to my local Home Assistant. I noticed that Nuki is “health checking” the Wifi Connection by connecting to the Nuki Cloud. If the connection to the Nuki Cloud fails, Nuki 3.0 Pro will disconnect from the Wifi. Of course when Nuki disconnects from the Wifi, MQTT also stops working and my local Home Assistant cannot communicate with Nuki anymore. I’m pretty sure the other local integrations like Homenet…

This is a long solved problem in the Nuki bridge by pinging the default gateway:

Bridge HTTP-API only sporadically reachable when no internet connection is avaiable (firmware 2.4.21)

I also have these problems. When deactivating internet access to the bridge, my bridge disconnect/connect about every 210 seconds. When activating internet access, the problem disappears. Firmware of this bridge is 1.15.1 I’m not happy to let have the bridge internet access… Raimund

Examples

I would like to use the Nuki SL 3.0 Pro with a local MQTT broker and a local Home Asssistant instance, even though:

• my internet is down
• my internet is flapping
• the Nuki Cloud is unreachable for whatever reason not related to my configuration
• my firewall does not allow access to the Nuki Cloud

Thank you for the consideration!

[aurelmarius (Aurel)]

This is more a bug than a feature request. Mqtt and local conectivity must work without internet connection.

[lukastribus]

That’s what I said, but Nuki disagrees.

Considering that for the price of a SL 3.0 Pro you can get a SL 3.0 + Bridge and spend less money, while at the same time not having to deal with this bug and the increased battery consumption due to Wifi, the 3.0 Pro does not make sense for me.

I have therefor returned the 3.0 Pro and will look for other solutions (3.0 + Bridge or even better 3.0 + the ESP32 solution).