Sometimes it worked for 1h sometimes 1month, but in the end the result was the same and connection was lost. Repairing helped for a while, but it happened always again. Tried pairing secured and unsecured, tried indoors and outdoor but the results was the same.
In the end I returned the device to the dealer. Unfortunately I cannot say is the problem with the device, Homey or the Popp app in Homey.
With this error, the first thing I would assume is that the device is broken.
However, I found out that there is a newer firmware for the plug, and it’s version 3.15. Unfortunately I haven’t found any history about the firmware versions. Therefore I can’t say what changes have been made, so maybe you can ask POPP.
This is the link for the new firmware. However, the problem is that Homey is not able to install a new firmware via OTA. What is needed for a firmware update and how it works can also be found via the link.
If you don’t have the possibility to do the firmware update, I can offer to send the plug to me (Germany).
Btw, this is not Homeys firmware version. This is the Node.js version what is included in the Homey firmware. The actually Homey Pro firmware is 8.1.1 (don’t know if the Homey Bridge has an other firmware no.).