Friday, February 12, 2010

Nokia N82 Bluetooth + GPRS/3G

A few months ago I did an interesting discovery about using my cellphone to go on the internet via bluetooth. I had this strange situation before where it just stopped working, and after revisiting all configs it worked again.

What really happens is that my cellphone somehow crashes, after which I power cycle it by removing the batteries. The phone then boots again, but here is the twist: the service channels in the phone are re-allocated and apparently in a random order!

This implies that the RFCOMM channel configured in the /etc/bluetooth/rfcomm.conf file is possible wrong now!

Solution: just browse the services again with sdptool browse, adapt the file and it should work again!

9 comments:

Mobiele Telefoons » Nokia N82 Bluetooth + GPRS/3G | Starlight: A few months ago I did an interesting … said...

[...] GPRS/3G | Starlight: A few months ago I did an interesting discovery about using my cellphon… http://bit.ly/cJ5B8c Tags: fresh, [...]

Mobiele Telefoons » Joost Yervante Damad: Nokia N82 Bluetooth + GPRS/3G: A few months ago I did an … said...

[...] Nokia N82 Bluetooth + GPRS/3G: A few months ago I did an interesting discovery about using m… http://bit.ly/cJ5B8c Tags: fresh, [...]

Damyan Ivanov said...

I would love if the bluetooth/rfcomm stack was smart enough so that we don't need to hard-code the channel.

Nokia N82 Bluetooth + GPRS/3G | Starlight « golf社交博客 said...

[...] is the original:  Nokia N82 Bluetooth + GPRS/3G | Starlight 标签: appid, cellphone, detected, device, few-months, get-one, internet, invalid, [...]

Nokia N82 Bluetooth + GPRS/3G | Starlight Thank god for 3G said...

[...] more here: Nokia N82 Bluetooth + GPRS/3G | Starlight By admin | category: 3g, nokia | tags: bluetooth, device, few-months, get-one, internet, [...]

emisca said...

I have also an n82.. I use blueman to create the serial device (rfcomm connection), then I use networkmanager for the connection.
No phone crashes, no scripting involved ;), really great.

Please make sure that the apn is correct in the phone menu..

Review: Lanzar SD55MUBT 5.4-Inch, not a bad product | MyReviewsToday.info said...

[...] Nokia N82 Bluetooth + GPRS/3G | Starlight [...]

Garmin nüvi 285W/285WT 4.3-Inch Widescreen Bluetooth Portable GPS Navigator with Traffic | VDO and GPS Multimedia said...

[...] Nokia N82 Bluetooth + GPRS/3G | Starlight [...]

jahor said...

hello,

i'm fighting with changing dialup channel too, but on nokia E52.

And because i don't use networkmanager, m sollution was to have "scripted channel guessing":
http://temp.jhr.cz/ikiwiki/html/blog/2010/02/14/bluetooth-rfcomm-bind-by-name/

maybe this could inspire you ;o)
be aware that my blog is in czech but the bash script should be selfexplanatory.