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-   -   N810 as a car computer (https://talk.maemo.org/showthread.php?t=20757)

carputer 2008-06-06 14:23

N810 as a car computer
 
Hi folks,

I'm considering using a 810 as a car computer, mainly for access to OBD engine management info, as well as Navigation. The 810 would be installed in a pod on the dash, so only its screen will be visible, no access to any hard-keys.

My question is, if the 810 is wired into the cars electrics, will it turn on automatically when external power is supplied to it?

thanks for any help

Benson 2008-06-06 14:28

Re: N810 as a car computer
 
It'll turn on and go into battery-charging mode when power is applied; it could be tweaked to boot into runlevel 2.

qwerty12 2008-06-06 14:35

Re: N810 as a car computer
 
Quote:

Originally Posted by Benson (Post 189345)
it could be tweaked to boot into runlevel 2.

Shouldn't be too hard:
Quote:

ACTDEAD)
enable_ondemand
push_bdaddr
def_runlevel=2

carputer 2008-06-06 14:49

Re: N810 as a car computer
 
thanks for the quick responses ..

is runlevel 2 fully booted and operational? (excuse my ignorance!)

tekk 2008-06-06 16:40

Re: N810 as a car computer
 
as a side-note, is there even an OBDII program available for the N810 that'll read data from the diagnostics port on a car? Also, do you plan on simply using a 12v plug (cigarette) to charge the device or hooking it up directly to a 12v source somewhere in the vehicle wiring? How would you do the latter?

aNoble 2008-06-06 16:52

Re: N810 as a car computer
 
Quote:

Originally Posted by carputer (Post 189351)
is runlevel 2 fully booted and operational? (excuse my ignorance!)

Yes. Every Linux distribution has various run levels (typically 0-6). 0 is halt, 1 is sort of a rescue/maintenance mode, 6 is restart. Some distros have one runlevel for booting to the command line and one for booting to X. In Maemo runlevel 2 is the default X session.

Wikipedia has a good rundown of runlevels http://en.wikipedia.org/wiki/Runlevel

aNoble 2008-06-06 16:54

Re: N810 as a car computer
 
Quote:

Originally Posted by tekk (Post 189366)
as a side-note, is there even an OBDII program available for the N810 that'll read data from the diagnostics port on a car?

There's Carman. I've never used it but it looks nice.

carputer 2008-06-06 17:55

Re: N810 as a car computer
 
Yes, Carman is the one is was going to try ..

On the power question, I'll be taking it to my local car audio shop for advice .. but there are usually a few options like using spare connections on the fuse box

gazza_d 2008-06-06 19:45

Re: N810 as a car computer
 
Carman works great for viewing the data.

Quick description of my setup (similar to most folks I'f guess). I have a Nokia N800 which I use in car for satnav (Wayfinder), Media Playback (Canola2), and Engine Data (Carman).
As I don't have a aux-in on my stereo I use a Griffin Itrip universal+ FM transmitter which has a usb port for connecting chargers etc. However I don't find that it supplies quite enough power to charge the N800 well. My friend, who also has a N800, has the Nokia FM transmitter which has a retractable lead and a built in flylead for power, which works really well - much better than the Itrip. I also use a bluetooth GPS receiver, and bluetooth to my phone which has a data connection. I use the keys on the frontpanel to swap between the 3 applications as needed and find that as a removable carcomputer it works great.

A few points on the initial post - If you are intending to mount the 810 in such a way that the hardware keys are hidden - why not buy an 800, which has a lot more storage capacity (i have 32GB), and is a lot cheaper. Also you could purchase a separate GPS receiver and mount that somewhere that will get the best possible signal and then connect to it via bluetooth. I also would suggest that in my experience you need access to at least the D-pad and home,menu and back buttons. The N8x0 is not entirely touch driven yet, although for media playback Canola is.

Also the charge for the N8x0 is 5v so you will need a converter. I would suggest obtaining a multi accessory socket unit, hide it, and either hardwire that to the car supply (fused of course), or just plug that into the car's accessory socket. Then use std in-in car mobile chargers for the tablet, and phone if required.

Gary

tekk 2008-06-06 20:10

Re: N810 as a car computer
 
Please keep us updated with the status of this as I'd be very interested in the results. Then I'd have an OBDII + GPS tool for my car!!!


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