Page 1 of 3 123 LastLast
Results 1 to 10 of 23

Thread: Is it possible to build a WOL dongle?

  1. #1
    Admin. Linux loser.
    Auto Apps:loading...
    Bugbyte's Avatar
    Join Date
    Sep 2004
    Location
    Corning, NY
    Posts
    7,364
    Blog Entries
    2

    Is it possible to build a WOL dongle?

    A nifty solution for autostarting a laptop in the car is using the Wake On Lan option. Most people who have used this hack up a router and wire it to the car and use it to wake the PC.

    But that seems kind of inelegant. My question is whether it is possible to build the equivalent of a dongle that would plug into the ethernet jack of the laptop, wire the other end to accessory 12v power and simulate the LAN message to wake the laptop.

    Does anyone know how that process works or can point me to a resource that will explain it?

    What would be required to do this? Are there a category of off-the-shelf components that can be used or is it even simpler, i.e. a voltage on the line?

    I've just read enough posts about auto-turn on of the laptop and was thinking a cool homebrew solution might be cooked up from the talents of our forum members.

    Any ideas on this?
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

  2. #2
    Confusion Master
    Auto Apps:loading...
    Enforcer's Avatar
    Join Date
    Sep 2003
    Location
    If you go down to the woods today, You're sure of
    Posts
    14,625
    Well most solutions use a magic 'packet' so you would probably need a little eprom (pic maybe) that would send said magic packet to the PC's MAC address when it receives a 12v signal.

  3. #3
    Newbie
    Join Date
    Dec 2008
    Posts
    5
    I don't know of anything off the top of my head that would do what you are wanting to do and to be honest with you I think you are making this a lot harder than it needs to be. Why not just use a relay to simulate pushing the power button when it gets a 12v signal? That would be much much simpler than trying to design something that could simulate a WOl packet.

  4. #4
    Constant Bitrate stealinfool's Avatar
    Join Date
    Dec 2005
    Location
    Orlando
    Posts
    142
    Quote Originally Posted by Jackster View Post
    I don't know of anything off the top of my head that would do what you are wanting to do and to be honest with you I think you are making this a lot harder than it needs to be. Why not just use a relay to simulate pushing the power button when it gets a 12v signal? That would be much much simpler than trying to design something that could simulate a WOl packet.
    If someone doesn't want to hack up any part of their laptop, ie. turnkey solution... WOL would probably be the easiest considering the limited hardware of a laptop.

    So yeah, as Enforcer says, a magic packet needs to be sent. I doubt this would be hard for someone familiar with the protocol, just a matter of programming a chip.

  5. #5
    North of the land of Hey Huns
    Auto Apps:loading...

    Join Date
    Jun 2004
    Location
    Westminster, MD
    Posts
    2,144
    Unfortunately the Ethernet Stack is not really possible to emulate on a RISC chip. Fortunatly there are premade solutions. You could take something like this: http://www.futurlec.com/Mini_Ethernet.shtml And combine it with a microcontroller to send your WOL packet.

  6. #6
    Admin. Linux loser.
    Auto Apps:loading...
    Bugbyte's Avatar
    Join Date
    Sep 2004
    Location
    Corning, NY
    Posts
    7,364
    Blog Entries
    2
    Thanks for the link!

    I'm not trying to make it harder than it is. In fact, I don't have a laptop as my car PC. I was just thinking that a lot of people don't like or aren't comfortable with hacking up their laptop power button. I just figured that a little plug-in device that could signal wake on lan would be desirable for a lot of people.

    One thing I've noticed over the past, say, two or three years is that with the falling price of laptops and their increasing power a lot more people are looking to re-purpose them for the car. A no-hack solution would be kind of cool.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

  7. #7
    FLAC
    Join Date
    Nov 2003
    Location
    Marietta, GA
    Posts
    1,134
    MikeH

  8. #8
    Vendor - Qube colin's Avatar
    Join Date
    Dec 2006
    Posts
    798
    I just want to put in some experience. Ethernet isn't killer complex, but it's not super simple either. Since it uses differential voltages, you'd probably be best off getting an ethernet chip and then maybe a PIC -- or the PIC J series with the ethernet already in them. Then you need a jack with embedded magnetics...
    It's not hard but theres quite a learning curve to it all. You could definitely make them, but not as cheap as a simple chip would be.

  9. #9
    Maximum Bitrate pRoFiT's Avatar
    Join Date
    Apr 2005
    Location
    Fresno, CA
    Posts
    798
    MikeH good find. I just checked my home pc network card and it has wake on link. Just need soemthing on the other side of the network to trigger it.

    As for magic packet. I've used Lantronix Xport (about $50) to do some networking experiments. Never messed with the magic packet. Probably not too hard to do in software. Does seem overkill for an auto power up on a laptop. Probably spend about $100 to get what you want. Might be able to mass produce something alot cheaper though...

    A cheap network switch would be better to use with the wake on link. Like MikeH's link talks about.
    Um, I guess this is where you put something witty.WITTY

    My Web site, in the design stage. http://home.comcast.net/~cstrachn

    Modified RRSkinEditor http://www.mp3car.com/vbulletin/rr-skins/65723-rrskineditor-bugs-fixes-comments-current-progress-outdated.html

  10. #10
    Constant Bitrate lacning74's Avatar
    Join Date
    Apr 2008
    Posts
    192
    Comments from my eee pc laptop worklog:

    Some comments on the RJ45 loopback wake-on LAN idea as mentioned by others. I took an old RJ45 cable and twisted wires 1-3 and 2-6 together.



    I made sure the windows XP settings of my LAN card was activated for wake-on lan. The BIOS menu also had an option for wake-on LAN that I turned-on.

    Well, it works, kind of. The computer must have shut-down or hibernated with power adapter on, and the power adapter also has to connected without interruption while the computer is shut-down or hibernated. Since I don't want my power adapter on draining my battery, this option became a wild-goose chase. Also, I have my computer to automatically go to hibernate after a few minutes without power from my car adapter that is hardwired to an ignition only fuse.

    To bad because it would have been easier than soldering the power button leads directly as I showed in the earlier post. An ideal carputer laptop would be one with a BIOS that can automatically turn-on when it detects power. Unfortunately, I don't think many laptops have this option.

Page 1 of 3 123 LastLast

Similar Threads

  1. Advise on Bluetooth Dongle
    By raphizzz in forum PhoneControl
    Replies: 8
    Last Post: 11-08-2007, 06:31 PM
  2. usb BT dongle and comport
    By diskey in forum Wireless Communications
    Replies: 0
    Last Post: 07-25-2006, 03:11 AM
  3. Replies: 4
    Last Post: 06-18-2006, 03:18 PM
  4. CSR Bluetooth Dongle - help please
    By Pabs in forum PhoneControl
    Replies: 7
    Last Post: 09-23-2005, 01:25 AM
  5. Bluetooth dongle hibernation problems
    By Sonicxtacy02 in forum Wireless Communications
    Replies: 1
    Last Post: 09-02-2005, 09:00 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •