Posts Tagged Wireless

Solve lost wireless at wakeup from suspend on Ubuntu OS 13.10

Problem:

Put Ubuntu Os 13.10 to suspend mode. After the system wake up from the suspend mode, wireless network is lost and never restart.

Solution:

First find out what your wireless kernel driver you use:

sudo lshw -class network

Then look for “driver=xxxxx” e.g.

Second, create a file “/etc/pm/config.d/config” and type the following line:

SUSPEND_MODULES=”b43″

you should replace the wireless driver you found in the first step the string “b43”.

After that, reboot the system. You should be on business. Test the suspend mode and see if it works.

 

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Appropriate setting is needed to get 300mbps wireless signal – ASUS RT-N16

I have the router for a long time. It was flashed with DD-WRT customized firmware. I did not spend time to study the firm and set it up based on past experience with other 802.1g router. Apparently I found that my wireless speed is limited to 54mbps. Never get up to 300 mbps. This is great router and suppose to transmit data in 802.1n 300 mbps speed.

The other day, I found a piece of information on the internet. It said that to get 300 Mbps speed, RT-N16 router should be set at 40Mhz radio signal. For strong security the WPA2/AES should be used. I did the setup and only see my iPod can some something like 108Mbps. And the speed frequently drop to 11MBps. I was puzzled a while. Then I reset my RT-N13U/B1 repeater and rebooted it. Hooray, now most time, I can see the  wireless speed is 300Mbps in the RT-N16 router. So my experience is that the router speed is depends on the speed of the connected clients. If a client connects to the router with low speed, everything else will be drag down to the low speed.

 

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Use ASUS RT-N13U Rev B1 as a wireless repeater

It is pretty simple to set Asus RT-N13U Rev B1 as a wireless repeater. Here are simple steps.

1) Reset the RT-N13U to default setting
At the bottom of the device there is a three-way switch: Router, AP and Repeater. Set the device to AP position, plug the power line to boot the device. After it completely boot, press the “Restore” button at the bottom until the power indicator flashing and release the button. After the device completely reboot, unplug the power line.

2) Config the device as a wireless repeater
Switch the three-way switch to the Repeater mode (put the switch to the middle position). Use an ethernet cable connect a computer and the device and plug the power line. Wait until the device completely reboot. Open a web browser in your computer, type “192.168.1.220/survey.html” to config the device. Once the available wireless access points show up, you can select your AP and provides necessary password key. After a couple of minutes, the device should be able to refresh the screen and tell you the new IP address of the device.

3) Other things
For a brand new device, you can skip the first step. For a device used for a while, it is better go through the above two steps. Access your device’s web UI, you can just type to new IP address in the web browser and visit the page. It will tell you the device is in the repeater mode.

Even the device is configured in the repeater mode, you still can config it to connect to all-in-one printer or a usb drive.

This is handy little device and have a lot of power and functions.

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FileApp – a useful tool for file transfer between iPod/iPhone and PCs

FileApp is a free app in iTune store. After I got it and tried a little bit. By following the app maker’s suggestions, I went their website and downloaded DiskAid, which is a paid application. I tried it and found its functions are just so so. Unwilling to pay for the application, my only choice is to use either iTune or FTP.

First let us explore the FTP solution.In the FileApp side, it is straight forward. After you open the app, tap the middle button on the top right corner, it looks like a wireless beam. When the sharing screen appears, tap WIFI button in the middle, the bottom part of the screen switch to Wi-Fi connection. There will be a LAN ip address with a port number, for example, ftp://192.168.2.22:2121, in which 2121 is the port number. When you setup the connection in your FTP client, you have to change the default port number 21 to 2121. The ip address is 192.168.2.22 in this case. In Windows, there are plenty of free FTP clients. I found one at http://www.coreftp.com/. It provides enough functions you need.

Second, let us look at the iTune solution. After you plug in your iPod/iPhone to your PC, you can use iTunesʼ built-in interface for ʻFile Sharingʼ to add and remove files from your iPod/iPhone.  Start iTune, select your device, and go to the ʻAppsʼ section at the bottom of the screen. You will find a list of Apps, select “FileApp”, then at the right hand side, you can see the file and folder list. At the bottom of the box, there are two button allow you add or remove files. See the following screen shot.

Enjoy your iPod/iPhone and FileApp and forget DiskAid.

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Experiencing Samba sharing in O!Play Air HDP-R3

I bought a ASUS O!Play Air for $104 from buy.com with this coupon in the other day. I was amazed about the little box. I always like ASUS products. I started to play with it and upgrade it firmware to the latest release v1.17N. One thing I tried today is to enable its Samba sharing function.

I read a nice post at http://durao.net/2010/06/01/oplay-hdp-r1-nas-with-firmware-1-27/. It provides simple command to enable the Samba sharing function as the following:

cd /tmp/package/script
./configsamba
./samba start

To do this, you have to telnet to the box first.

First find out the IP address the little box has from its user interface. In your Windows box, use telnet or PuTTY to telnet to box by this IP address. Log in with root and no password. Then, all you need to do is to type the above Linux command to enable Samba sharing. That will allow you to access the external storage attached to the device.

Once this is done, you can use your windows explorer to find and browser files and folders on O!Play. Type \\192.168.2.15 (replace with your real IP addrss) to the address bar. I got the shared drive. I selected a folder on O!Play (wlan) and copied entirely over the net to my Windows box (wlan). Figure 1 show some detail information related file coping.


Figure 1

One thing make me bad is that there connection error message pop up frequently. Figure 2 is one of the error message.


Fgiure 2

After I saw this errors, I tested copy function through my wired machine. The windows box (wlan) is same, select and copy file and folder from a wired Linux machine (lan). The speed is much fast 1.86 MB/second instead ot 700-800 KB/second in the above O!Play case. I also connect the O!Play air with ethernet cable to the LAN, the speed bumped up to 2.0MB/second (15 Mbps). That makes me thinking the the Wireless Card (N category) is a very cheap one and does show a lot of errors, just like the ones on EEE BOX machines. My other machines have much better wireless card or wireless usb adapter than those in EEE Boxes. I do not expect I got great hardware at this low price. So I recommend that you always connect your O!Play to your network through wired cable whenever it is possible.

Visit a collection of links and files related to O!Play Media Player at http://bookmark.sunfinedata.com/index.php?id_category=478.

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