In this geeky, techie, lengthy post, we look at the setting up of a mobile
bluetooth network with Internet and curry sharing. Before we get our hands greasy,
let's get some of the 'what if's' out of the way first...
if you are at a non-WiFi place and require an Internet connection?
You could use GSM, GPRS or EDGE through a mobile phone, PDA or notebook. Or find
an Internet cafe with Internet, not just games.
if you need a wireless connection faster than EDGE?
There is now Jaring
Wireless in selected areas and IF the signals behave, it is can be so fast it
leaves even 3G in the dust.
if you need to have Dreamweaver, Premiere, Photoshop, FTP, Trillian, Skype, Kaaza
and 25 Firefox tabs opened at the same time?
You still need a good old
notebook on the road. Even a canggih PDA costing RM 4000 can't help you here.
if your buddies want to surf together at your favourite mamak stall?
Ask them to buy you Tandoori chicken and themselves a bluetooth dongle.
if Uncle Mydeen from the stall insists you download Pramugara
Ask him to buy the VCD lah.
if you get funny stares because of the strange looking SOMAport?
in your car and read the the following paragraph.
roti and an apple. Rian's
Power Mac G4 has bluetooth and attitude built-in. || ||Pummkin's
plight, a 3am fight. Pam surfs and battles mozzies at the same time.|
server. SOMAport, MSI Bluetooth Dongle beaming the Internet to a mamak stall or
pasar malam near you.|
you may have figured from Going Wireless
Part 1 & 2,
the SOMAport can be mobile. I can connect it with a custom external battery pack
or power it from a specially self-modified UPS that connects to the car's cigarette
lighter socket for charging. The UPS's internal battery acts a buffer and absorbs
reckless car voltage. I've also soldered in a diode to prevent reverse current
flow when the car is starting or when the engine is switched off.
one can use a inverter
or connect directly via a DC cable from the cigarette lighter socket. While the
input of the SOMA is rated at 12V, the car's voltage may be anything between 13.5
to 15 volts and the surges or disruption when you start your car may damage the
unit. Also be sure to check the polarity of the connector before plugging in.
Don't say I didn't warn you if you choose to connect this way. If the mamak stall
has an available power point, just take out the SOMAport and stop violating Jaring's
warranty. Some mamak shops may charge you for power usage though.
if you damaged the wireless modem and have already terminated your Streamyx or
Go home and back to dial-up hell.
if you go along with the plan? What else do you need?
A set of jumper
cables for your car battery (just in case) and mosquitoe coils if you plan to
surf under the stars till way past midnight.
What if TV Smith stops
the 'what ifs' and cut to the chase?
OK. So, I have safe and precisely
regulated 240 volt AC and SOMA is humming away. A notebook sitting in my car acts
as a server tethered to the SOMAport by Ethernet cable. It then provides network
access to the remote notebook(s) wirelessly by bluetooth. The bluetooth method
of Internet access sharing is quick and dirty. Here I use a MSI dongle connected
to the main notebook. The thumbnail sized unit cost about RM 80 at Low Yat. Some
newer notebooks may have bluetooth already built in.
one can also hard wire a wireless AP (wi-fi style) to the SOMAport in the car,
I opted for bluetooth because of its extremely tiny footprint on both transmitting
and receiving sides. Set up is also quick and the least messy. It is also relatively
more secure as allowed devices require authorisation and password pairing. File
sharing and remote printing is also possible but I use that only at home.
if my car is park nearby (up to 50 feet) and the server-side notebook is up and
running, me and several users can surf with a bluetooth enabled client-side notebook
out in the open, anywhere as long as there is coverage from Jaring.
if you cannot find a parking bay nearby?
If the car is not within sight
and Internet access from the table is suddenly lost, it means some drug addicts
are already on the way to Pasar
bandwidth tester sometimes returns
an implausible speed as it takes a shortcut home.|| ||Get
a 2nd opinion. McAfee's speedometer
does a reality check with a few hops across the oceans.|
- I tested the service from friend Rian
Maelzer's 26th floor penthouse at Villa Scott, a stone's throw
from KL Sentral. Fastest we achieved was 681 Kbps (by McAfee Speedometer). The
speed seemed to fluctuate and appeared considerably lower on subsequent tests.
Perdana - 171 kbps in the car by USB measured with Firefox bandwidth
Frasers Towers, PJ - At Daniel
Tang's 9th floor apartment, we managed around 381 kbps via USB. The SOMAport sat
on a window sill facing Gasing Hill. Wired Streamyx 1 MB package came in around
470 kbps in the area.
© 2005 TV
Link to this article: http://www.tvsmith.net.my/duasen/300105_sharing.html