wifi coverage large apartment

what would experts recommand how to cover larger apartment (120 m2) with wifi when we know that modem with internet is in the corner (and have to be).
I assume wifi router connect in that corner. But on other side of appartmend could be no or bad signal.
So how to solve this?
- UTP cable to another side of appartment and another wifi router?
- Extender to receive wifi signal and create "new one"?
- power line?

I would prefer to have 1 SSID and smart switching between APs based on signal strenght

So what technical solution and hardware could be the best? And not expensive - just as home solution.
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helpfinderIT ConsultantAsked:
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JohnBusiness Consultant (Owner)Commented:
I have a Cisco RV220W (RV180W works too) in the basement of my house behind an 8" inch iron beam. I get good coverage on the second floor other corner.

I suggest a very good wireless router will cover your area just fine.

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Network ZeroCloud Engineer Commented:
I already recommended this unit to a guy that was expanding wifi in a church on here and he loved it, the reviews speak for its self

You could literally have it step up in less then 10 minutes and it's POE. This thing will beat out a Cisco aironet

Ubiquiti UniFi Long Range Access Point, (2.4 GHz, UAP-LR-US, US Version) https://www.amazon.com/dp/B005H4CDF4/ref=cm_sw_r_awd_afccvb1X06CNH
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Michael HughettICT Field Systems AnalystCommented:
Or you can go Mesh  to extend your coverage.  Getting 2 nodes from Open mesh can give you coverage in hard to reach places.  Very inexpensive and easy set up.  I use these in Haiti.

helpfinderIT ConsultantAuthor Commented:
Thank you all for your suggestions till now
@Network Zero - did you want to post one different link since both are the same? I guess come controller to that AP you provided?
VB ITSSpecialist ConsultantCommented:
I would recommend the Ubiquiti UniFi AP's that Network Zero has mentioned as well. The base UAP models are relatively cheap and very stable.

The Zero Handoff feature will present you with a single SSID and your wireless devices will connect to whichever AP that has the best signal - exactly what you want. They can be configured via a software controller so all you need to do is install the software on your PC. As long as the AP's are connected to the same network you will be able to configure them through the software controller.
JohnBusiness Consultant (Owner)Commented:
The area is not large so there is no need to go wild on equipment.
Craig BeckCommented:
The Ubiquiti kit is great and very cheap for what you get.  The controller is actually just management software which is installed on a PC.  It's free.

One thing I will mention though is that you also have to consider how far your client device can transmit its signal.  It's all very well saying stick a AP or router somewhere and make sure it's got a massive range, but if the client device can't reach the AP/router you'll be no better off.  Also you may only be able to achieve a slow data-rate at the edge of the AP/router's coverage area which will be of no use unless you're only wanting slow speeds.

I'd put enough APs to cover the area well and that will let you roam freely with no difference in service.  Two APs or an AP and a router connected via cable would be fine.
helpfinderIT ConsultantAuthor Commented:
Thank you experts for your suggestions
JohnBusiness Consultant (Owner)Commented:
@helpfinder  - You are very welcome and I was happy to help.
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