Re: usbserial on N8X0!
 

Unfortunately, the popular Keyspan USB-to-serial adapters don't all work with the pl2303 module (depending on the age & chipset).

Is there any chance that you could compile the keyspan module? It's available from http://www.keyspan.com/downloads-files/developer/linux/


Thanks for providing the kind of support that Nokia should be supplying!

Re: usbserial on N8X0!
 

Why should they? They used an open platform, so hackers can hack. But I don't see why they should be recompiling everything anyone might ever want, things on the premise that 'someone will eventually want this', even though the device is not designed or marketed to do that.

It's better that they should fix some of the things they do advertise the tablet for, which are now broken, inconsistent, or otherwise suboptimal.

Re: usbserial on N8X0!
 

You don't need a line in for this purpose, just place the tablet's mic close to the radios speaker.... or connect audio out from the radio to the mic-in line of a headset connected to the N8x0.


Going somewhat back to the original topic.... anyone know if there is a way to get 4800 baud NMEA GPS serial output from the N810?

Re: usbserial on N8X0!
 

Some level conversion is probably in order, but yeah, the mic-in should do it.

Should be straightforward, if you have cgps from gpsd. Do the N810s have that (or is it available)?

Re: usbserial on N8X0!
 

Maybe its a line-in/mic-in, and besides, I wrote a post about this suggesting bluetooth as connectivity so then you can not only lose audio wires, but then you would be able to control a psk rig controller via bluetooth (probably have to make your own bluetooth interface though.)

Re: usbserial on N8X0!
 

Benso, yes level conversion can be a simple resistor in the line/connector.
I just found this link: http://www.eham.net/articles/18197 I like how the guy modified a cheap blue tooth ear piece for line in/line out. I think these are minor problems though, the big hurdle is someone finding the time to port/develop a PSK app for the device.

Regarding 4800 baud NMEA GPS, I'm new to tablets, so can you tell me what is cgps from gpsd? I was more concerned about what kind of hardware would be required to pull spit serial out from the device. So far I've only found overpriced ~$100 blue tooth serial dongles for this purpose.

scumgrief, I understand there is a Palm OS emulator for the N800. I wonder if any of these programs will run under emulation: http://www.dxzone.com/catalog/Software/PalmOS/

Re: usbserial on N8X0!
 

Yeah, just didn't want someone blowing their mic-in in a careless moment, so it's always worth mentioning.
Either the wired or BT (cool project, BTW) analog link should be pretty straightforward.
Software is probably even less trouble, though:
http://packages.debian.org/sid/psk31lx
Already a deb for armel; it's likely that it can be installed.
And Linux Author mentioned gMFSK, which is gnome, hence should be a pretty simple port.

Nothing tablet-specific; it's one of the progs in the (regular) gpsd distribution. I've not got an N810, so I'm no expert, but I understand it uses gpsd internally. Still, Nokia strips down a lot of "unnecessary" things, so it may not be there. Check by going to xterm and trying to run cgps.

For the serial data, BT-RS232 is nice because of no wires, but expensive. This whole thread is about USB-RS232 adapters, which are typically much cheaper; if you get one of the ones mentioned, it should work.

Re: usbserial on N8X0!
 

The audio chip is a T.I. TSC2303. It is apparently a custom chip derived from the TSC2301 or TSC2302. The whole series of chips have 2 (i.e. stereo) line-in inputs with gain control, but it is not clear that the custom chip used in the N800 actually routes the inputs outside of the package. We don't have the pinout.

The datasheet of the TSC2301 is here

Re: usbserial on N8X0!
 

This one does http://www.dealextreme.com/details.dx/sku.5859

Re: usbserial on N8X0!
 

Nice, and what kind of adapter do you use to connect it to the Nokia? Does Deal Extreme sell it?