Signal strength java WIFI app

hi
im making a application that searches for all packets retrieved on a network and where
they are comming from using jpcap.
my question is, and i have been searching on google and cannot find much on. is that
how would you get the signal strength of a wireless ap
im guessing that you would just ping it.
e.g.
send a packet at it and determine how long it took to get back to you
the ferther away the longer time :)
anyideas
there's probly a easy tool in java that you can use that i have stupidly missed out on

morgalr wrote:
jwenting wrote:
morgalr wrote:
Um, NO. Radio Waves travel at 300,000,000 meters per second, approximately the speed of light, Actually they travel AT the speed of light, which is approximately 300E6 meters per second in vacuum.
Of course the speed of light is itself affected by the medium through which the radiation is travelling, usually meaning that the actual speed will be slightly lower than the speed in vacuum (though I think I read somewhere of an experiment leading in at least one case to a speed faster than that in vacuum, don't know whether that was ever reliably replicated).It seems to me that that is approximately the speed of light--300E6==300,000,000--unless you want to put qualifiers onto it--like STP or in a a vacuum.your post could have been interpreted as stating that radio waves travel at approximately the speed of light and that they travel at 300 million meters per second ;)

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IPHONE 5: can't receive calls and random error messages, such as "could not activate cellular data network" and "no connection - network unavailable, please connect to wifi or cellular network." This occurs even when signal strength or wifi is operational, and it does not matter whether wifi is on or off. ATT went through the standard protocol - resetting network, resetting sim card, etc. No changes. Other phones working fine in same region with same carrier. Apple's solution is to restore software, but haven't gone there yet. Anyone successfully addressed this/these issues?

I should point out that it worked when the iPhone was set back to factory settings, but when restored with the backup, data/internet no longer works again, and I get the "Could not activate cellular data network" error message yet again.

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On my iMac I have four bars signal strength. On my iPad2 I have one bar and it will not connect to the WiFi.

I have a similar problem.
(But not on Crystal Palace Tx).
Switch to a poor channel. (Dave for example. This is one I have problems with).
Go to Settings, TV Settings, Freeview Signal Strength.
Now press the Info button to get extra information.
Note the UHF channel number, the channel is being received on.
Get the same channel information, on the other Freeview receiver you have.
In my case, the UHF channels are different.
I believe, the Youview box is pre-set to receive from a transmitter (and hence a UHF channel number), determined by a post-code and/or your address details.
Because my aerial is not pointing at the main transmitter for my post code, I get poor reception because the transmitter the aerial is pointing at, transmits Dave (MUX) on another UHF channel.
As confirmed by the other freeview receivers I have.
There doesn't seem to be a way to force the box to use any other UHF channel.
Any scan always comes up with the same one.
There is no manual setting.
I might be totally wrong, but I think this is another software bug.

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Things, which I did not like right away:
1. The physical design: Though pleasing to look at, this impractical design take too much room on the surface. There is no option to mount it on the wall (Which is my preference.)
2. Installation: In an effort to make it idiot proof, Cisco decided to just include a CD for installation. I am fine with that. I popped the CD, and connected the router through the cable to my laptop. That was not enough, the installation program wanted to configure the router without the wire. It expects, Windows to have networking control. My Lenovo does not have the setup which the installation program expects, so it gave up, and expected me to call Support.
3. Knowing a thing or two about networking, I decided to configure the router using the Web Interface. The logon screen came up asking me to enter the userid and password. As a reasonable person, you would expect to find this information on the accompanied CD. Guess what there is no user manual on the CD. There is a link for the User Manual on the CD, which tries to take you to Cisco.com. My router was not configured yet, so how do they expect me to go to Cisco.com. This is perhaps the most idiotic action on Cisco's part. Cisco could have included a little sticker with the default user id and password (admin/admin) on the router somewhere.
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Things I liked in this Router:
1. Configuration Options
The configuration option (Once you know the userid and password) are just perfect for a SOHO user. Cisco has made a great effort to simplify technical jargons into simple terms. They have eliminated unnecessary complicated settings, which most of us never user, yet leaving behind, enough to satisfy a medium level user like me.
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Things to watch out:
This is a dual band router, which means that it gives you two separate frequencies to operate your Wifi Network.
A - 5.6 Ghz
BGN - 2.4 Ghz
Make sure you have separate SSIDs for the two networks. It is a very common mistake people have made.

Yes you are right the SSID for both the networks has to be different.. and apart from that regarding wireless in 5 GHZ you can try channel width as 20MHZ only and wireless channel to 149 or 161.
In 2.4GHZ you can try with channel width as 20MHZ and channel to 6 , 9 or 11 and then observe the wireless connection..
Make sure the firmware should be updated as well.

Any apps to measure wifi signal strength?

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Where did you get that from? It displays signal strength and noise!!!
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SNR is the raw signal data minus raw noise displayed in dBm. The percentages that iStumbler displays are not very useful, but fun to look at.
It appears that you might be able to calculate the actual SNR by using the Inspector feature of iStumbler under the Edit menu, then do the math. Let us know if this works for you. Post back if you do not know how to do this. WiFi Explorer does this for you right on the main page.
SNR Signal Quality Chart
40+          Superior
35            Excellent
30            Very Good
25            Good
20            Fair
15            Low
10            Very Low
5              Not reliable

Mid 2010 iMac Wifi signal strength issue

I am having issues maintaining a robust Wifi signal on my 21.5 inch 2010 iMac with 10.6.5 installed.
my symptoms are very similar to what is described in this post:
http://discussions.apple.com/thread.jspa?threadID=2596933&tstart=0
in addition to that I am experiencing the following symptoms:
can't print to HP wireless printer
remote app for iphone doesn't find the iMac
mobile mouse remote app doesn't find the iMac
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accumulation of send and receive errors in Network Utility
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as reported in the post mentioned above, signal strength for my Windows laptops and other devices is consistently -25 but the iMac signal strength fluctuates wildly.
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Update concerning additional troubleshooting steps that I have taken.
1) did a clean install of OS 10.6.3 onto an external drive and managed to replicate the issue....so that rules out apps, preference files, etc.
2) managed to get a little bit more stability by setting up an Airport Express in 5Ghz mode with Interference Robustness turned on and the multicast rate set at 9Mbps....of course ios devices don't do 5Ghz so I still have to run another AP...so not an acceptable solution.
What else do I need to do to prove that it's a Mac OS software issue?

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Ok, about a week ago i posted about getting strange behaviour with my 2g Ipod touch's wifi signal meter: http://discussions.apple.com/message.jspa?messageID=8098190#8098190
I finally downloaded Wifinder (which measures the signal strenght) and find im getting really low readings in comparison to my Imac's wifi. Standing right infront of the router i get a reading of 60 (the scale being from 1 to 100) and in the next room i get a reading of 35-45 where my imac gets around 75. Im not having problems connecting or surfing (the routers if tested are all WEP) but I am concerned with the signal strength. Can anyone give me any reference of the signal with Wifinder on their Ipod Touch? Is the touch's wifi reception significantly lower than other wifi devices?
I might just go back to the apple store tomorrow, still thinking about it though (i hate having to prove to the guys at the store that my unit has an issue).
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I haven't actually used that app, so I can't speak to its reliability. However, I can tell you that when I visit my parents' house (they live in suburban NJ - tons of houses about a driveway apart from each other) my Toshiba notebook picked up on a bunch of networks, my MacBook picks up on a few less networks, and my iPod touch finds only the one I created with my AirPort base station. So the iPod touch's Wi Fi antenna is certainly not as strong as what one would find in a computer.
CG
Message was edited by: CasperGemini (typo)

My WiFi signal is displaying negative numbers instead of signal strength.

Recently my Ipod 3rd gen. has been getting real weird with the wifi. first, it would always lose signal whenever i would do anything, like watch videos or open an app that required wifi. if i moved a couple feet it'd start to connect again. Then it started displaying a "-87" where the wifi signal would be. and the number would either increase or decresase, until i tried doing something that requird wifi. at first it would only come on whenever i restarted my ipod and itd quickly lose signal. ive restorede my ipod 3 times today, dumped everything. ive tried jailbreaking it to see if itd refresh files or anything. im not sure what to do anymore. ive looked for hours online and cant seem to find anyone with this problem. Any suggestions or ideas? without me buying a new one. i don't have a warranty..
Message was edited by: jbiggie1130

Interesting. The -87 refers to signal strength in db, which I believe are decibels. The lower the number, the stronger the signal.
However, iPods don't display these numbers unless you have jailbroken the device or are using an app like WiFinder (since removed from the App Store).
And since you have jailbroken the device we can't, by the terms of service of this site, offer you any advice other than to refer you to help article on WiFi: http://support.apple.com/kb/TS1398

TS1559 wifi signal strength problem

my ipad 3 wifi signal strength is very (increase or decrease) and some time its appear one bar
please tell me what i do for its solution
thanks

Could be a router problem or settings problem.
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4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are droping internet connection)
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6. Potential Quick Fixes When Your iPad Won’t Connect to Your Wifi Network
http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
iOS 6 Wifi Problems/Fixes
Wi-Fi Fix for iOS 6
https://discussions.apple.com/thread/4823738?tstart=240
How To: Workaround iPad Wi-Fi Issues
http://www.theipadfan.com/workaround-ipad-wifi-issues/
Another Fix For iOS 6 WiFi Problems
http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
iOS 6 iPad 3 wi-fi "connection fix" for netgear router
http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
How to Boost Your Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.h tm
Troubleshooting a Weak Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Sig nal.htm
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http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
Wi-Fi or Bluetooth settings grayed out or dim
http://support.apple.com/kb/TS1559
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

Battery , time , signal strength bar is not getting displayed in home screen , these will be displayed only when i click on any app. Can u let me know the setting change ?

Battery , time , signal strength bar is not getting displayed in home screen , these will be displayed only when i click on any app. Can u let me know the setting change ?

Did you check the Zoom setting?
Have you tried a reset (reboot)? Hold HOME and SLEEP until an Apple logo appears.
If it isn't Zoom and a reboot doesn't help try Settings/General/Reset - Reset all settings

I updated to IOS 5 and now my signal strength drops sometimes clear to zero when I open an app.

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Hello timfromharris,
Have you gone to your date and time settings and verified that "set automatically" has been checked?
If you don't know where to go, it's Settings -> General -> Date and Time.
Good luck!
Brendon

My iPod touch 4th gen. Keeps giving me the error message "cannot connect to the app store when I sign in. I can open the app store and browse it but I can't download anything. I have full signal strength with my wi-fi and safari is working perfect.

My iPod touch 4th gen. Keeps giving me the error message "cannot connect to the app store when I sign in. I can open the app store and browse it but I can't download anything. I have full signal strength with my wi-fi and safari is working perfect. I turned it off and restarted it 3 times now. I have an iPad 2 and the app store works flawlessly with it. What is going on?

Same here on my lpad2. Can access the web just fine from browsers but cannot install new apps or updates in appl store. Seeing a few others reporting same issue tonight so likely an apple server issue and staff will notice it in network monitors and fix it...sometime this weekend.
Rob

How can we access network signal strength of pocket PC in java 1.1.8?

can anyone tell me if there is any way i can access the signal strength of a wireless access point by a java program for a pocket PC (Compaq iPaq)?
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Hello,
I'm a french student and I have exactly the same problem as you.
It has been 3 weeks I'm searching, but I have not results.
Today, do you have the solution????? If yes, can you tell me something about that??
Thank you very much!!!
Yohan
can anyone tell me if there is any way i can access
the signal strength of a wireless access point by a
java program for a pocket PC (Compaq iPaq)?
the iPaq only supports java 1.1.8

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Why would two wifi-only iPad 2s sitting side by side, connected to the same router, have different signal strengths? The 32gb black shifts between 1 or 2 bars and the 16gb white has 3 bars consistently. Both have the same version of iOS (5).
Thanks!

Why would two wifi-only iPad 2s sitting side by side, connected to the same router, have different signal strengths? The 32gb black shifts between 1 or 2 bars and the 16gb white has 3 bars consistently. Both have the same version of iOS (5).
Thanks!

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Signal strength java WIFI app

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