Wireless internet is everywhere these days and you could have several WiFi capable devices connected to your own wireless network. Because of that it’s important the WiFi router is placed in the best available location to give the longest range and strongest signal to as many devices as possible. If the router is placed in a poor location the signal could be weak, intermittent or cause constant dropouts.

The app lives on your menu bar, the icon of which can be fully customized and clicking on it gives you everything from the Signal to Noise Ratio (SNR) to the max data rate and MCS index of your connection. There is a real-time graphical representation of the signal rate and noise rate and the app can also recommend the best channel. Download for Mac. To use the Signal desktop app, Signal must first be installed on your phone. Signal for Windows. SignalProtocolKit is an implementation of the Signal Protocol, written in Objective-C. Objective-C GPL-3.0 80 202 11 3 Updated Aug 26, 2020 SignalMetadataKit. The next step is to download the Signal app for Mac. The app is not available on the Mac App Store, so you’ll have to download it from the developer’s website. Unzip the file and drag the Signal.app file into your /Applications folder. Once installed, launch the app. If a message pops up confirming whether you want to open the app, click Open.

There are many factors that can affect the quality and strength of a WiFi network connection. These include walls, floors, ceilings, electrical appliances, anything emitting radiation or electromagnetism, and of course distance to the router. Windows and most bundled WiFi software allows you to see how good the current wireless signal is. To get a better idea how the signal is behaving and whether it gets affected by other factors it’s a good idea to monitor the signal strength over a period of time.

Watching how your WiFi signal behaves over several minutes or even hours could help identify if the current location for it is ideal or causing problems. Here we list 5 free tools that show a graph for your wireless signal so you can watch it over a period of time to see how it behaves.

1. NetSpot

NetSpot is a free wireless network signal analysis and troubleshooting tool available for both Mac and Windows computers. In addition to a standard WiFi discovery and monitoring section it also has a site survey feature that allows for the relative network signal strengths to be plotted onto a map of your building or local area.

The program starts in Discover mode which shows available wireless networks along with some general statistics. Double click on the target network to open the details window. This has a Signal tab which shows a graph of the signal strength over a period of time, the last 5, 30, or 60 minutes can be shown in the window at once. Also available is a Tabular Data window that shows the same data as the graph but in text form.

The frequency of the signal strength scanning can be either left at the default of 5 seconds or changed to 10, 30 or 60 seconds. Do be aware that NetSpot crashed for us on first run but appeared to work fine after a system reboot.

Download NetSpot

2. inSSIDer

The sad thing about inSSIDer is it stopped being free and became a shareware application from version 3 onwards. Luckily version 2 remains free and open source although it’s not had any updates since 2012 and compiled versions with the free source code are a bit hard to find.

After installing and running the program click the Time Graph tab to see the signal strength graphs for all found wireless networks. Uncheck those you don’t want to appear in the graph display to be left with the signals to be monitored. The display shows signal strength over a period of 5 minutes and any selected SSID will be shown in bold. Although you cannot view the signal for more than the 5 minutes you can right click on the graph and copy an image of it to the clipboard for a snapshot record. This can in turn be pasted into a paint program.

Download inSSIDer 2.1

3. Homedale

Homedale has a big advantage over the other tools here because it’s the only one that is completely portable, which many people prefer. The program is well laid out and easy to use. Besides the signal graphs you can also get your location at the click of a button from a mapping service such as Google.

Monitoring a wireless network is a simple case of going into the Access Points tab and double clicking on the access point. Its icon will turn red to signify it has been selected and you will be shown the current signal strength graph. The graph itself refreshes every 2 seconds by default and shows about 20 minutes worth of signal history. The refresh rate can be changed from the Options tab to 1, 5, 10, 30 or 60 seconds. Right click to save the current graph as an image or start logging the history data to a text file.

Homedale also supports a few command line switches so you can launch it to start monitoring and logging a specified network automatically. Use /? in a Command Prompt to get a list of arguments that can be used. For example the following will create a log.txt and add a signal strength entry every 3 seconds for the SSID Raymondcc_WiFi.

Homedale -s Raymondcc_WiFi -l log.txt -r 3000

Download Homedale

4. Acrylic Wi-Fi Home

The Home version of Acrylic Wi-Fi is free for personal use and has enough to show a signal strength graph for monitoring or troubleshooting. One useful feature missing and only available in the paid Pro version is the ability to alter the timeline of the signal strength graph from the default of 5 minutes to 1, 3 or 10 minutes.

On install and launch click Options (3 horizontal lines) and choose Advanced Mode to make the graph full width and remove the useless Pro only network quality pane. To remove a wireless network from the graph click on the color block to the left of its name in the SSID list. The graph is colored into good and not so good strengths, highlighting an SSID will bold it for easier viewing, Microsoft .NET 4.5 is required which will need to have been installed on Windows 7 or Vista. Visual C++ 2012 Redistributables are also required.

Download Acrylic Wi-Fi Home

5. Vistumbler

This tool has a few quite advanced options such as GPS support, live Google Earth tracking and a number of experimental features. More standard functions include getting WiFi signal strength and information as well as the ability to audibly speak out the signal strength to you.

You don’t really have to do much to get the strength information after installation, simply click Scan APs and click on Graph 1 or Graph 2. Then click on a wireless network in the list to populate the graphs. The first is a simple line that measure signal strength over a few minutes. The second is a bar graph (pictured above) which shows the signal strength history for around 11 minutes. Changing the Refresh loop in Settings > Misc Settings to another value from the default of 1000ms (1 second) will lengthen or shorten the graph history time.

Download Vistumbler

We did also look at Xirrus WiFi Inspector and NetSurveyor although both don’t log wireless signals for very long. Xirrus also requires you to fill in an online form to get the download link from the website.

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Tried netspot inssider and homedale. It seems that homedale is the only one who will log signal stregth for long period of times (indefinitely?) in the log file.

Go to access points and double click your router
go to access point graph right click and ask to log, you need to specify a file name

The log file is very simple and has the format yy-mm-dd hh:mm:ss: .
you can select the whole text, past it to, say, google sheets and write in an empty cell the formula =min(b:b), it’ll show the min power value of the log file

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Homedale create a file named oui.txt inside its residing folder which is very annoying.
Every time you close the program you have to delete this file manually, it consumes
about 2M of disk space.

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Thanks looks well done and there are some other nice utilities at the site.

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Thaks for good Proggy

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Analysis To protect mobile devices from being tracked as they move through Wi-Fi-rich environments, there's a technique known as MAC address randomization. This replaces the number that uniquely identifies a device's wireless hardware with randomly generated values.

In theory, this prevents scumbags from tracking devices from network to network, and by extension the individuals using them, because the devices in question call out to these nearby networks using different hardware identifiers.

It's a real issue because stores can buy Wi-Fi equipment that logs smartphones' MAC addresses, so that shoppers are recognized by their handheld when they next walk in, or walk into affiliate shop with the same creepy system present. This could be used to alert assistants, or to follow people from department to department, store to store, and then sell that data to marketers and ad companies.

Public wireless hotspots can do the same. Transport for London in the UK, for instance, used these techniques to study Tube passengers.

Regularly changing a device's MAC address is supposed to defeat this tracking.

But it turns out to be completely worthless, due to a combination of implementation flaws and vulnerabilities. That and the fact that MAC address randomization is not enabled on the majority of Android phones.

In a paper published on Wednesday, US Naval Academy researchers report that they were able to 'track 100 per cent of devices using randomization, regardless of manufacturer, by exploiting a previously unknown flaw in the way existing wireless chipsets handle low-level control frames.'

Beyond this one vulnerability, an active RTS (Request to Send) attack, the researchers also identify several alternative deanonymization techniques that work against certain types of devices.

Cellular radio hardware has its own set of security and privacy issues; these are not considered in the Naval Academy study, which focuses on Android and iOS devices.

Each 802.11 network interface in a mobile phone has a 48-bit MAC addresslayer-2 hardware identifier, one that's supposed to be persistent and globally unique.

Hardware makers can register with the Institute of Electrical and Electronics Engineers (IEEE) to buy a block of MAC addresses for their networking products: the manufacturer is assigned a three-byte Organizationally Unique Identifier, or OUI, with is combined with an additional three-byte identifier that can be set to any value. Put those six bytes together, and you've got a 48-bit MAC address that should be globally unique for each device.

The IEEE's registration system makes it easy to identify the maker of a particular piece of network hardware. The IEEE also provides the ability to purchase a private OUI that's not associated with a company name, but according to the researchers 'this additional privacy feature is not currently used by any major manufacturers that we are aware of.'

Signal For Mac Desktop

Alternatively, the IEEE offers a Company Identifier, or CID, which is another three-byte prefix that can be combined with three additional bytes to form 48-bit MAC addresses. CID addresses can be used in situations where global uniqueness is not required. These CID numbers tend to be used for MAC address randomization and are usually transmitted when a device unassociated with a specific access point broadcasts 802.11 probe requests, the paper explains.

Open Signal For Mac Osx

The researchers focused on devices unassociated with a network access point – as might happen when walking down the street through various Wi-Fi networks – rather than those associated and authenticated with a specific access point, where the privacy concerns differ and unique global MAC addresses come into play.

Unmasking

Previous security research has shown that flaws in the Wi-Fi Protected Setup (WPS) protocol can be used to reverse engineer a device's globally unique MAC address through a technique called Universally Unique IDentifier-Enrollee (UUID-E) reversal. The US Naval Academy study builds upon that work by focusing on randomized MAC address implementations.

The researchers found that 'the overwhelming majority of Android devices are not implementing the available randomization capabilities built into the Android OS,' which makes such Android devices trivial to track. It's not clear why this is the case, but the researchers speculate that 802.11 chipset and firmware incompatibilities might be part of it.