Welcome to the community @HBalazs. A purple indicator light on the SuperWifi indidates the SuperWifi is not configured properly. If you did reset it but not reconnect it via a cable, that is the situation.
If you want to reset the SuperWifi, it's best to reset all of them and freshly install them as if it's the first time.
We explain this in this Knowledge Base article:
It is in Dutch, but with Google Translate it should help you.
If it is urgent it might be best to discuss this via the phone. To do so you can make a callback appointment.
Hi Jasper, thanks for the response (I can speak mid-level Dutch, but as this topic is quite technical, I am writing in English, if it’s not a problem :)
In the meantime I managed to configure the 2nd wifi point by connecting it to the modem via cable, by also keeping the 1st wifi point connected to it (earlier I swapped them and used the same port/cable to configure them). It seemed to be working: when I moved the 2nd point to the original spot (wireless), for a period the wifi was OK (green light), but then it became weak again (orange light). I don’t know the reason, as I have been using the same setup for 2 years without issues (the signal wasn’t always the strongest, but there were no issues during online meetings).
Now I am think about connecting the 2nd point via an ethernet cable to the modem. Yesterday I have tried it as a test, but the 2nd point became the Main wifi source: so the signal was very good on the first floor, but became weak at the ground floor. I used Ethernet slots 1 and 2 on the modem. Can you please advise how to connect both wifi points, to make sure they are equally strong and stable? thanks
How far apart are both SuperWifi points? The Wifi signal isn't only affected by things in your home, signals from neighbors can also interfere with your network. It's possible something nearby changed, which is affecting your connection. Does it improve when you plave them closer together?
Dear Jasper,
thanks for your response. The 1st wifi-point is right next to the modem (connected via cable) on the ground floor, the 2nd one is on the 1st floor.
To solve the problem, I tried to connect the 2nd point with cable too. The good thing is, that now the devices are connected to the wifi point that is closest to them (as I see from the Thuis app). But when there are multiple devices on the 1st floor, all of them connected to the 2nd wifi point, they are “sucking away” the bandwidth from my work laptop on the 2nd floor. That is a problem as I work from home a lot, and I need to have stable connection to the video calls.
Do you have a suggestion how to manage that?
thanks, Balazs
I don't think they're sucking anything away, I think the second floor is just on the edge of the network. Which causes it to not have a stable connection. You can move the second SuperWifi around a bit, maybe place it higher, to see if that helps the second floor. There is no copy paste solution for situations like this, it's a matter of trial and error.
Thanks Jasper. Now the second wifi point is connected with an Ethernet cable, located on a higher spot of first floor. I assumed it means that - due to the cable connection - the wifi point should be as strong as if it would be right next to the modem, and should be able to transmit enough signal to the second floor.
Again, so far I have been using the internet on the second floor via the Superwifi point connected wirelessly on the first floor. Now with a cable connection, the signal of the point on the first floor is much stronger, but still there is not enough signal to the 2nd floor.
What is the floor made of? Is it reinforced concrete? That can negatively influence the Wifi signal sometimes. If that's the case, it might be worth it to have a cable to the 2nd floor and connect the SuperWifi there.
Yes, the floor is made of concrete. But as I mentioned, for 2 years I have been using the same wifi point wirelessly (same location) without issues with the devices on the 2nd floor. Now that I connected the same wifi point with ethernet cable, I assumed that the service will be more stable, but unfortunately this is not the case: when more devices are connected to this wifi point, the coverage on the 2nd floor is getting unstable.
I understand it used to work before, but right now it doesn't. That's why we need to try things to see of we can improves it. I can't see the situation, I can only give you suggestions, and only you can try them. Have you tried the cable I mentioned?
Hi Jasper,
I have bought a 15 m Ethernet cable (Cat7) and used that to connect the 2nd wifi point, which is now located on the 2nd floor. The wifi point is 3 meters away now from the laptop on the same floor, and the signal is still not full, sometimes dropping to half when I am in a video call. And I am all alone in the house, so no other device is in use. I am concerned that if other devices are connected to the same wifi point, the bandwidth will drop on my work laptop.
We have glass fiber in the house, the wifi point is connected via good quality cable, close to the device - so I expect the connection to be super reliable and stable.
Does it matter, to which modem slot I am inserting the ethernet cable?
Which port you use shouldn't matter much. You can try another, but I don't expect a change from that. But it might be a surprise 
When you started the laptop, did you restart it? When you wake a device from sleepmode it sometimes reconnets to the previous point. It could be it hasn't connected to the moved SuperWifi yet.
Yes, the laptop is restarted every now and then. And it is always on the same spot, so it was never connected to the 1st wifi point on the ground floor.
I checked the modem, and the blue ECO light is on. Does it mean / influence anything?
The ECO mode should not affect the SuperWifi points, but you can turn it off to test if that is an improvement. Usually the ECO mode only affects the modem itself.