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Why Does My Wi-Fi Randomly Stop Working?

And more importantly, how can I fix it? 

There’s little more frustrating than your Wi-Fi going down. Whether you’re working from home and mid Zoom, streaming your favourite show or gaming with friends – If your Wi-Fo goes down it’s an urgent problem to solve as soon as possible. 

Much like a power cut, when there’s no Wi-Fi we really feel it’s absence. And much like flicking the light switch on and off, we head straight for the hardware when we’re trying to figure out what the problem is. 

What to check on your hardware when your Wi-Fi stops working

  • Are the router and any other units plugged in and switched on – Are the lights on? 
  • Is every relevant cable properly connected?
  • Are any external antennas linked to the router fastened correctly?

Checking for disconnected cables that have been unplugged, disconnected or damaged could be a straightforward fix for your Wi-Fi woes.

If it’s an intermittent problem, then look for a ‘strangled’ cable. This is a cable that might be getting squashed underneath furniture or has perhaps been nibbled by a pet. 

If you’ve checked all the cabling and hardware and things look okay – What’s next?

How to check if it’s a Wi-Fi problem when your internet connection goes down

If everything is powered-on hardware wise, then the next thing to check is your Wi-Fi and whether the signal is being broadcasted. Find a device and try to connect to your Wi-Fi. 

  • Is your network being broadcast – Is it in the list of possible networks to connect to?
  • Can you connect to your network on the device?

What to do if your network is not being broadcasted or you cannot connect to the network

If one or neither of these things is happening, then the problem could be with your wireless source. You could try resetting the power on your equipment ie. turn your router off for 30 seconds and then turn back on again. 

You may even need to replace your router. If yours is leased from your Internet Service Provider (ISP) then get in touch with them to see if they can either help reset it remotely or get you a replacement. 

What to do if your network is being broadcasted and it says you’re connected, but you still have no internet connection

If you can see that your network is being broadcasted and you are able to connect to it, then check the signal strength in various locations (ie. where you need a connection).

What should my Wi-Fi signal strength be? 

In an ideal world, your Wi-Fi signal would be above -68 dBm.

For general internet access (not voice or video calls) then you could probably manage at -72 dBm. 

Anything below that level would probably cause problems, and you would likely need to be considering alternatives to solve your signal coverage issues. 

These alternatives could invoice:

  • Additional access points
  • Extender / mesh extender

Be cautious with signal extenders – These should only really be used as a last resort. This is because in order to keep the wireless link between the extender and main router, they use up considerable bandwidth. 

You could instead try a tri-radio router and implement multi-radio extenders or mesh nodes. This could enable you to use one channel for your network and another for end device access.  

How to measure your Wi-Fi signal

To measure your Wi-Fi signal and check if you have enough coverage, there are a couple of ways to do this. 

Measuring Wi-Fi signal on a laptop

If you have a laptop, you can check the stats of your wireless interface, or install a wireless measuring tool, like WinFi Lite. 

Measuring Wi-Fi on a smartphone

If you have an android smartphone, you can install a wireless signal measuring app, like “WiFiman”, or if you have an Apple device, you can install the “Airport” app and use it to scan the signal strength.

Measuring Wi-Fi signal strength

Using the tools above, you will be able to not only measure your own network but also neighbouring networks and how they are affecting yours.  

It’s nigh on impossible to be unaffected by an external 2.4 GHz network. If you can, try to use the 5 GHz spectrum. This network has more channels for you to use and thus a lot fewer interfering networks, even in residential areas. 

Bear in mind that in locations like apartment complexes, even the 5 GHz spectrum can become congested but is still generally the better option. 

An even better option would be the 6 GHz channel, but it’s likely that your devices will no longer support it in the not so distant future. 

If your Wi-Fi coverage seems fine, it could be your network usage causing internet problems

If your hardware looks okay, your network is broadcasting and you can connect, and your coverage looks good, then it’s time to consider your network usage. 

At the time you were experiencing internet problems, consider

  • How many people were connected to your network
  • What they were using the internet for 

It’s quite likely that your router wasn’t built for the demands of multiple video conferencing calls on your work laptop, a show streaming on Netflix, plus online games being played on the iPad. 

That’s a considerable amount of traffic for it to process and could cause things to get a bit unpredictable connection wise. 

If this is a common usage demand, then it may be time to speak to you ISP and see if you can upgrade your router and package. Think about whether it would be worth upgrading to hardware that supports Wi-Fi 6.

You could also consider installing additional access points to help ease the burden on the main router. 

Another potential solution is to skip the Wi-Fi element altogether, and plug your device into the router via an Ethernet cable. Hint: THis is also a great way of testing whether the issue lies with the internet connection itself or how the Wi-Fi signal is being transmitted. 

‘I’ve tried everything and my internet still won’t work!’

Okay, we get it, by this point you would be really frustrated. You’ve checked the hardware, you’re connected and coverage is fine, network usage is low – Yet there are still network problems! What else could be causing your internet connection to be unreliable and unpredictable? 

It could be wireless interference issues. 

Many routers we use in our homes support only 2.4 GHz communications. The problem with using that range is that many other manufacturers use those channels for other pieces of equipment because it’s cheap and long ranging. 

Things that could be interfering with your Wi-Fi signal are:

  • Baby monitors
  • Wireless video security cameras / doorbells
  • Microwaves
  • Motion detectors as part of an alarm system

These are just a few common examples, there are many others that use the 2.4 GHz band and could cause interference problems. To get a full picture of what’s going on, you could need a spectrum analyser.

There are of course other possible forms of interference as well. Where is your wireless router located? You should avoid:

  • Shutting it in a cupboard
  • Placing behind a large bit of furniture
  • Too much metal close by (cabinets, fridges, etc)
  • Mirrored windows 
  • Painting walls with magnetic or metallic paint

We have a whole article on how to avoid interference – You can check it out here. 

Could it be your naughty neighbour? 

As we must consider all possible options – Could it be that your neighbour is doing naughty things to your internet connection? 

Unfortunately, it is a possibility that your neighbour is deauthenticating your network. This means they are using external wireless equipment to pose as your network and then start sending deauthentication packets to your users. In other words, telling devices that are connected to your network to get off every time they leave and try to reconnect.

It’s very hard to catch this happening unless you have the proper knowledge and tools. Fortunately, some access points can detect these attacks and report them like cloud-based solution access points.

Is there anything else that could be causing my Wi-Fi problems?

So far we’ve checked:

  • For hardware problems
  • Whether your network is being broadcasted
  • Whether your Wi-Fi is transmitting a signal
  • How strong your Wi-Fi signal is / coverage
  • Network usage
  • Wireless interference
  • Naughty neighbours

That’s a pretty comprehensive list. If none of these are causing your internet problems, then it could be the integrity of your internet connection. 

How do you check the integrity of your internet connection?

Use one of your devices to check to see if you are getting an IP address. This is something you could try first, but if you checked the connection using an Ethernet cable (for example, a desktop computer that’s connected directly to the main internet connection (router) via cable) and everything was fine then your main internet connection is unlikely to be the issue. 

Things to check:

  • Do you have an IP address?
  • Can you ping your gateway?
  • Do you have DNS?

If you don’t have an IP address:

Have a check of your network stats and verify if you have a proper IP address. If you don’t, then try to register again to your home network. To do this you can simply just restart your router. 

If that doesn’t work, then try resetting your DHCP server. Most of the time, it’s to do with the home router. If you’re not using a router, then whatever you are using – restart that. 

If restarting it doesn’t work then check your DHCP configuration or give your ISP a call. 

If you do have an IP address:

If you can see that you do have a proper IP address, try to ping a public site like google.com. If that fails, try to ping a well-known public IP address like 8.8.8.8. 

If that works, then there may be an issue with the DNS that you have configured so you could try using public DNS servers, like 8.8.4.4 or 8.8.8.8. 

If a ping to a public IP address fails, then that indicates that the problem is either in the path between your home router and the ISP or something in the ISP itself.

It’s not you, it’s them

Sometimes it’s not anything to do with any of the potential problems we’ve discussed above. Sometimes it’s a problem with your Internet Service Provider and there is simply an outage on the service that you are trying to access.  

This can be for a few different reasons. 

Perhaps you have been disconnected because your street or building has a problem in the distribution panel. A cable could have been cut or damaged somewhere in the network during construction or roadworks or something similar. 


It could also be a problem with the ISP infrastructure. If they are experiencing issues in their client management system, then this would stop you accessing the service. 

If you’ve tried all of the above and nothing has helped, then it’s probably time to give your ISP a call and see if the problem is their end of things. 

Good luck! 

by admin
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Wi-Fi Wi-Fi Imaging Wi-Fi Issues
Researchers See Through Walls With Wi-Fi 

New technology recently engineered by scientists at UC Santa Barbara using Wi-Fi signals has enabled people to see objects and read letters through walls.

Your initial reaction to this is probably one of two things:

  1. Wow – Amazing! What a breakthrough
  2. Well this seems like a potential privacy issue further down the line

How have Wi-Fi systems been used to see through walls?

Researchers from UC Santa Barbara developed this system where the edges of solid objects on one side of a solid barrier ie. a wall, can be traced from the other side using WI-Fi signals. This includes letters of the alphabet. 

Imaging the letters individually, in one experiment this technology was used to work out the word ‘believe’ from the other side of a wall, deciphering the letters one by one. 

They did this using 3 standard Wi-Fi transmitters. Over a particular area, these Wi-Fi transmitters sent wireless waves. The imaging was based on measuring the signal power received by a Wi-Fi receiver grid via receivers mounted on a movable vehicle. 

3 transmitters you say – Would that not be triangulation? One of the researchers on this project states that triangulation is not being used. Instead, each transmitter is merely providing a different viewpoint, illuminating the area from different angles. This approach helps to reduce the chance that one of the edges they are detecting will not fall into a ‘blind region.’ To leave a signature on the receiver grid, they need to be ‘seen’. 

The key to the success of this tech system using Wi-Fi signals to see through walls is their edge-based approach. Triangulation in this instance would not perform well. 

How can objects be tracked using Wi-Fi signals?

This tech system is based on the principle of Keller’s Geometric Theory of Diffraction (aka The Keller Cone). 

Keller introduced his Geometrical Theory of Diffraction (GTD) in the 1950s. The development of this theory was revolutionary, as it explained the phenomena of wave diffraction entirely in terms of rays for the first time, via a systematic generalisation of Fermat’s principle. In simple terms, it explains the process of a wave bending around an object (or obstacle) and how it spreads out across a particular space. 

Using the principle of this theory, the system can interpret what could be on the other side of a wall. 

Why is seeing through walls with Wi-Fi something new?

Scientists have actually been attempting to do this for a while, years in fact. This particular team at UC Santa Barbara have been working on this since 2009. This latest engineering breakthrough is significant because it was previously thought that anything as complex as reading the English alphabet through walls using Wi-Fi signals would be too difficult due to the complexity of the lettering. 

Indeed, using Wi-Fi for imaging something still (like letters) has been a challenge due to the lack of motion. However, they seem to have overcome this issue by tracing the edges of the objects.

Back in July, we saw a similar tech engineered by researchers at Carnegie Mellon University where they tracked a 3D shape as well as human bodies moving in a room using Wi-Fi signals. 

Seeing Through Walls With Wi-Fi – What will it be used for?

Assuming that this tech system matures and is put to wider use, we might find it useful for a few different applications: 

  • Crowd analytics
  • Identifying individuals
  • Boosting smart spaces 

Is the resolution high enough? 

Resolution on imagery can be improved by increasing the signals to higher frequencies. However, this would also increase the propagation loss so there would be a trade-off on energy.

This is likely where future experimentation will lie, as researchers and scientists look to explore this energy trade-off as frequencies and propagation loss increase.  

Is it just edges of objects that can be detected? If this tech system of looking through walls with Wi-Fi signals is going to be widely adopted then depth sensing would also be useful. This can be achieved by using a wideband signal for transmission. 

The experiment spoken about in this article was designed to showcase the performance of everyday radio signals, using 802.11n Wi-Fi which is narrowband. However, the framework could easily be expanded to utilise wideband signals too. 

What challenges could ‘seeing through walls’ with Wi-Fi face?

As we stated at the start of this article, some potential issues that could arise from using Wi-Fi signals to see through walls relate to privacy and security. 

Thus, this could have an effect on how successful this new tech system could be. 

Could cyber criminals use this technology in part of an attack? Could law enforcement officials abuse this technology in some contexts?

We wrote on this topic of Wi-Fi seeing through walls back in January, about a similar piece of research that used ‘dense pose’ from Wi-Fi, using Wi-Fi signals as a human sensor and a way to map the position of human bodies using AI. You can read it here.

What are your thoughts on this – We’d love to know! Which camp do you sit in – Amazing Breakthrough or Privacy Nightmare? Get in touch on Facebook, X or Instagram. 

by admin
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Broadband Home WI-Fi Wi-Fi Wi-Fi Issues Wi-Fi Problems Wireless Network
Is an Everyday Household Item Slowing Down Your Wi-Fi?

Whether you rely on your Wi-Fi to work, stream Netflix or game, one thing we can all agree on is that there is nothing more frustrating than slow, buffering Wi-Fi or internet blackouts. Frozen zoom calls, ‘Something’s gone wrong’ error messages in the middle of binge-watching your favourite series or letting the team down mid-battle could have you tearing your hair out in frustration.

These days, having a strong, reliable, fast broadband connection is vital. And often, we don’t realise quite how much we need something until it’s not working effectively or completely gone. 

But what if one of your everyday household items was the cause of your Wi-Fi woes? Here are some commonplace things that you likely have around your house that could be causing your internet issues – And things you can do to help overcome them. 

Can concrete cause Wi-Fi problems? 

Obviously, there’s nothing much you can do about the actual structure of your home, but if it’s full of thick concrete walls then you may experience problems getting Wi-Fi throughout your property. It’s a tough material that’s difficult to penetrate, meaning your network coverage could struggle. 

This could result in a lag in signal or some rooms being in a deadspot. 

We’re not suggesting taking a sledgehammer to your walls – But you can carefully consider where you are placing your router for optimum coverage. You could also look at whether extenders could help your signal reach parts of the house that the signal can’t get to. 

Can metal interfere with my Wi-Fi?

Metal is another dense material that can negatively affect your Wi-Fi speed. Using metal structurally could inhibit the strength of the signal you are transmitting. Likewise, too many metal household items (like blinds) or decorative items (e.g. wall art) could cause issues with signal reaching your devices. 

As above, thinking carefully about where you place your router can imrpove things, and extenders can be used to access those hard to reach places. 

Can plaster and drywall affect my Wi-Fi? 

Most if not all houses will have elements of plaster and drywall. Thankfully, it doesn’t interfere with signal as much as concrete does so there should be less signal lost. 

Could the ceramic tiles in my house cause internet issues?

Ceramic tiles are a popular choice in our kitchens and bathrooms. Unfortunately, this material can disrupt Wi-Fi signals in your home. Ceramic tiles also tend to be coupled with other disruptive material like plaster and drywall mentioned above, which can cause even more interference to your Wi-Fi.  

Placing your router somewhere central in an elevated position can help to combat some of this Wi-Fi interference. 

Are my Low-E windows causing Wi-Fi problems?

Every house has windows – But a certain type can cause problems with your Wi-Fi. Those conscious of their energy consumption and trying to reduce how much energy is lost by installing Low-E (low emissivity) windows could unfortunately result in problems with their Wi-Fi instead. 

Low-E windows have a metallic film on them to help reduce energy consumption, which also means they can absorb or interfere with Wi-Fi signals. So they could be great for your energy bills but not so great for your internet connection. 

Do mirrors interfere with Wi-Fi signal? 

Mirrors have a thin coating of metal behind the glass which together can cause enough electromagnetic interference to disrupt your Wi-Fi signal. Especially if your house is adorned with lots of mirrors! 

The level of disruption depends on how big the mirrors are and how many you have. 

Is water the reason my Wi-Fi is slow?

Water can hinder the passage of Wi-Fi signal, so things like fish tanks and even people can make your connection weaker by the time it reaches your device. 

This can have a big impact on how well your devices connect to your Wi-Fi and thus how effective they work. 

Can my furniture cause internet problems? 

Do you have pieces of large furniture in your home? A house full of big, thick furniture could struggle with less stable internet. 

Experiencing signal disruption is more likely if you place your router too close to any large items of furniture – Try to choose a an area that is unobstructed and in as open a space as possible.

Could my household appliances be disrupting my Wi-Fi?

Houses are full of white goods, and unfortunately these can cause a weak Wi-Fi connection. Appliances like microwaves and dishwashers emit their own radio waves, so it’s a good idea to place your router well away from them. 

You might even be able to salvage a weak Wi-Fi connection by moving your router away from appliances like this. 

Got Wi-Fi Issues In Your Home?

If you are facing some Wi-Fi troubles in your home, then try these top tips to try and mitigate any interference from household items. 

  • Don’t tuck your router away in a cupboard, out of sight or surrounded by furniture. 
  • Find a central location for your router so that it stands the best chance of reaching every corner of your home
  • Deploy your router in an elevated position to help transmit that signal 
  • Avoid installing your router close to bulky furniture
  • Thick concrete walls are not your router’s friend – Try not to place your router near them 
  • Water (think fish tanks, water tanks, even people) absorb the signal and can interfere with how effectively your device can connect so deploy your router away from these things
  • Kitchens are full of white goods (microwaves, dishwashers etc) which emit their own electromagnetic waves, so don’t put your router in this room if you want it to work at it’s optimum  
  • Try to avoid placing your router near large mirrors or windows. If you are considering Low-E windows, think carefully about whether this could affect how effective your Wi-Fi is
by admin
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