Announcement

Collapse
No announcement yet.

Me and a friend are looking to set up...

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Me and a friend are looking to set up...

    We are trying to go with a non conventional way of wireless networking for the carputer+home. My friend is a network guru (well maybe not a guru, but he knows more about networking than I, and I'm fairly familiar with it) and he was shooting out a couple ideas, I would like to get some decent range with a broadcast. I dont know anything about bluetooth, but before I get into that I want to quickly run over the "best" idea we had.

    Since wireless anything is just a broadcast of a signal, we figured we could use CB frequency(ies) to transmit data using the bittorent protocal so it can have some checks to verify the data was recieved properly, because I'm sure there will be a fair amount of data loss with using a cb frequency, and cb's can sometimes get a decent amount of range, so I was thinking that since I work about 4km away from where I live (I'm lucky there) that I could broadcast from my house and receive it in my car.

    -A couple problems I see with this however, is
    1) Obviously the data loss, I'm probably underestimating that fact if this is even doable.
    2) Transfer speed, cant be very fast over cb freq's
    3) Range

    It was just a brainstorm idea, but from what I hear bluetooth is what would be perfect for me. I've never dealt with bluetooth nor have I read about it. I am going to go do some ing and see what I can find out about bluetooth. If anyone has some good bluetooth reads that I may not come across easily please let me know.

  • #2
    while you're googlin' take a peak at packet-radio. Ham operators (not too far removed from CBrs) have been moving data about over these frequencies for decades. But then their radios aren't hopping from receiver to receiver while in motion themselves so they fight doppler shifts a bit less often. Keep us posted!
    •Micke

    Comment


    • #3
      I've got a friend who's a ham and he's been using packet radio for years on his sailboat. Downloads weather reports, maps, all kinds of stuff. He also uses it to upload location data that posts to a server so you can always see where he is.

      Great range but it costs a couple hundred for a radio and of course you need an entry level ham license.

      I'd think that CB's wouldn't work because they are AM and way too noisy. Of course, it's also against the law to utililze it for what you're think of doing.

      How about a GSM modem? That would give you excellent range and you don't have to solve any of the transmission issues.
      Originally posted by ghettocruzer
      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

      Comment


      • #4
        yeah same here, I have a couple friends that use packet radio as well, but it's very very slow. pretty much only good for getting email's and such
        肚子笑痛了
        S60 Install

        Comment


        • #5
          Bluetooth devices usually only work within about 100ft. Other than that, the signal cuts out and causes problems. You need to use your home internet connection and get a wifi signal or a cellular data connection in the car. What kind of data are you trying to broadcast from house to car?

          D

          Comment


          • #6
            my friends dad rigged up a tracker into his mums car... i think that was usin packet radio, it looked like a CB, with the handset etc, but had a gps mouse and some other crap plugged into it... (after my friend crashed his mums car.) haha.

            Comment


            • #7
              The problem with CB (other than legality) is the bandwidth at that low of a frequency. The typical HF packet speed is 300 baud, typical VHF speeds are 1200 baud. If you want any kind of bandwidth, you will need to go higher in frequency, perhaps the 900MHz ISM band would work, but depending on line of sight, 2.4GHz hardware would probably be cheaper.

              APRS is a ham system that mostly operates on the 2 meter (146MHz) band (as well as some HF and internet linking) at 1200 baud (usually) that allows position reporting (and some other uses such as messaging) inexpensively using a basic "modem" (Terminal Node Controller - TNC), GPS receiver, and radio. A simple system can be done (using new parts) for under $200. This works well because there is relatively little data to transfer from each node (position (~1sec burst) every several minutes).

              Andy N8MX

              Comment


              • #8
                Isn't CB radio one-way? If so, wouldn't he have to include some kind of controller to allow for bi-directional communication?

                CB Radio is a very bad idea. It's spectrum is being de-regulated (slowly) by the new "GW Bush" Administration; and it will likely disappear in the next 4 years.
                DashPC - The Linux Car (since 1999).

                Dash LCD, Via Epia, GPS, XM, OBDII, DSSC Shutdown Controller.

                As seen in the book Geek My Ride

                Comment


                • #9
                  If you want to try bluetooth, I would first try this... http://www.mp3car.com/vbulletin/showthread.php?t=36168 . The addition of a 5dBi antenna to a USB bluetooth adapter will supposedly give you up to a 1 mile bluetooth range. If both computers had this antenna mod installed, I would easily expect at least a half-mile range with good signal quality, and over a mile is possible.

                  Comment


                  • #10
                    Originally posted by cbergeron
                    Isn't CB radio one-way? If so, wouldn't he have to include some kind of controller to allow for bi-directional communication?

                    CB Radio is a very bad idea. It's spectrum is being de-regulated (slowly) by the new "GW Bush" Administration; and it will likely disappear in the next 4 years.
                    Wow. I would really like to see proof of this. You'd think that being the dumbass hilly billy he is, he would know not to screw with truckers, and their livelyhood. He takes away CBs and his whole administration will be looking over their shoulders.

                    But on the serious side, definetly look into packet radio. I started playing with it, sort of getting my feet wet in ham radio. I was pretty awesome. Like wifi, slower, but incredible range. And then you start looking at repeaters, and the whole ham thing.
                    2000 Subaru OBS

                    Dell P3 @ 900 Mhz
                    7" Lilliput TS w/DigitalWW in-dash mount
                    80GB External HD

                    I am Zero Bitrate....

                    Comment


                    • #11
                      im curious how large of a wifi antenna can we use? i know i can get almost a block with mine if i ad a larger one im hoping i can get down to the gas station or on the other side of town would be cool. im thinking a cb would not be the greatest idea.
                      I GIVE FREE HUGS!
                      Buy Sell or Trade
                      If my pm box is full, please feel free to call me any time. 440-328-3382
                      Thank you
                      Forex
                      Rate Mp3car @ FXroot.com

                      Comment


                      • #12
                        There was a slashdot article a few months ago about the Defcon convention in Nevada i think it was and one of the challeneges was longest range for wifi. The winner got somthing like 11 km's using 2 usb wifi adapters a couple very large satallite dishes. At 11 km's (or whatever it was) they actually ran out of road. The signal strength was also supposed to be something comparable to two laptops with internal wifi sitting next to each other. So its all about focusing that power.

                        Comment


                        • #13
                          Originally posted by david_594
                          There was a slashdot article a few months ago about the Defcon convention in Nevada i think it was and one of the challeneges was longest range for wifi. The winner got somthing like 11 km's using 2 usb wifi adapters a couple very large satallite dishes. At 11 km's (or whatever it was) they actually ran out of road. The signal strength was also supposed to be something comparable to two laptops with internal wifi sitting next to each other. So its all about focusing that power.
                          thats with a clear line of sight (or whatever its called)... and with HUGE parabolic reflectors...
                          [meaning that i dont think you could do something like that in you car...]

                          i think i remeber seeing someone on this forum [ a police officer i believe] who attached an amplifier to his 802.11b/g adapter/antenna...and he got like really good distance
                          AT mobo
                          Intel Pentium MMX 233mhz
                          ESS Solo PCI soundcard
                          Linksys NIC
                          Irman

                          Comment


                          • #14
                            Originally posted by jjh221
                            im curious how large of a wifi antenna can we use? i know i can get almost a block with mine if i ad a larger one im hoping i can get down to the gas station or on the other side of town would be cool. im thinking a cb would not be the greatest idea.
                            Google for cantenna, and variations ie canntenna cantena seems to be a bit of variation in the spelling. If the reports are correct there seems to be a couple of miles range in it, but mostly line of sight. So if you can find open high ground you can proberly pick up somebodys wifi leakage and surf from your car for free .
                            EPIA MII: 512m Ram: LinITX 8" Touch Screen: Carnetix P1290 PSU: 802b PCMCIA Wireless card: Slot DVD Player: Touchpad: Wireless Keyboard: BU303 GPS Mouse:
                            Win 2000: RoadRunner Front End: Michelin Mapstore GPS: Netstumbler:

                            Comment


                            • #15
                              I have a 1 watt amp going in tomorrow, I'll tell everyone how it goes.

                              I also have one extra left :P

                              Comment

                              Working...
                              X