It looks like the N70 is still far too new for many bluetooth devices to support natively yet, the TomTom One included. Still it’s possible to use it with your TomTom to get all the TomTom Plus services.
Here’s a quick breakdown of the steps required.
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How nice is this for hunting down those hotspots whilst on the move? TomTom being the wonderful people they are dump out all the gps data to /dev/gpsdata ( unsuprisingly ) in the standard gps NMEA format.
Just the very format most wi-fi stumblers use to log the position a hotspot was discovered. After a little hackery pokery I’ve manage to get it streaming over bluetooth to my ibook running macstumbler. Job done. View the image below for an example.
I’ve a few minor issues to work out but it’s functioning a treat.
Yey, I finally managed to get around the devpts issues and remotely login to the tomtom.
Next? how about gdb ttn… 
I also grabbed a larger SD card so I can get more binaries on the TT, hopefully python if I can get it cross compiling correctly.
This is also all on a stock TT One, no kernel was recompiled in pursuit of this hack.
Check below for the shell feedback.
I finally managed to get a working IP stack from the TomTom One to my PC working…
I ended up using rfcomm and running ppp over it. I would have preferred to use PAN but that didn’t look like a goer from the stock TomTom kernel.
Unfortunately devpts was also omitted from the kernel, so I’m going to have to get a little creative with the pseudo terms.
Here’s a quick teaser before I package it all up with a telnet daemon..
Have just got myself a TomTom one. Lovely bit of GPS / Linux integration and hacker friendly too…
At the moment I’m just seeing what it could be capable of and the first step towards that is seeing what dmesg dumps out..
I’ve already bust out the boot loader and startup scripts and have been annotating a dump of ttn navigation app to see what interesting stuff I can glean from that.
Next on the list is gaining a remote shell without writing my own custom firmware or boot loader.
Read on for the messages log…