DIY: Simple PSP-GPS hookup

[seesoe]

the program will not start if the checksum is wrong, but if i remember right checksum is disabled now so either way its not checksum

do the normals check if the wifi switch was on
use the global map and press square see if the arrow comes up

[deniska]

Hey Deniska,

I got my GPSlim236 yesterday and made a cable in about an hour.

Only problem is I can't get it to work with your Map This! program.

I tried your old green screen GPS viewer program and that works fine.
I just don't know what I'm doing wrong.

I edited the config file to turn off the fake NMEA info.
But the display just says bad data.
I noticed the checksum value thingie for beta testers. Do I need a certain value or something?

Otherwise, great program. Certainly the best homebrew I have ever seen.
Any help appreciated.

take out UMD
check WIFI switch
make sure GPS' red light is blinking...

[mr-flibble]

Thanks for the fast responses guys.
WIFI off, UMD out, GPS position fix, but still no luck.

Just strange that it works fine with the old GPS viewer but not with Map This!

For the record, I made the PSP serial connector out of an old ISA card.
The cable is 1.5 metres long.

Maybe Map This! has more strict data transmission standards than GPS viewer?

I might try making a shorter cable and see if that works.

[FairladyZ4U2NV]

you can always just do wifi update from mapthis menu its very easy to do not complex things to install, you just good beable to wait a while for it to download

when it does finish i find it the easyest way, i recently downloaded 64 by 64 size map with a base zoom of like 0 so that gives me 4 zoom levels but it took about 1hour and a half

Well for some reason I can't get the WIFI to work for me. The script however does work, I just messed up. I dled wget and bc to my HD and installed from there, but let it be known that method does not work! I uninstalled them and used the cygwin setup to get them via one of the online mirrors and it worked just fine after that.


Also BTW....Deniska, thank you for making this. I can't wait to see further releases/updates!

[FairladyZ4U2NV]

I might try making a shorter cable and see if that works.

I don't think the length of the cable is the problem, mine's 8 or so feet long and it links up with the 236 just fine.

[deniska]

Thanks for the fast responses guys.
WIFI off, UMD out, GPS position fix, but still no luck.

Just strange that it works fine with the old GPS viewer but not with Map This!

For the record, I made the PSP serial connector out of an old ISA card.
The cable is 1.5 metres long.

Maybe Map This! has more strict data transmission standards than GPS viewer?

I might try making a shorter cable and see if that works.

Hey,
In one of the threads in my dev forum I gave out a link to beta version and the instructions on how to calculate the checksumm.....
You may want to find it and test with your GPS receiver.. it has a slightly different Nmea read logic... it worked fine for all my testers...

[mr-flibble]

Finally got it working, turns out you need to have something inserted into the adjacent headphone socket.
Of course, anyone using a normal combo connector wouldn't have had this problem but my ghetto connector is just a bit of PCB jammed in to the serial port.
Thanks to Fairlady for pointing out that cable length wasn't an issue and putting me on the right path.
/Can't wait to run around town tomorrow without getting lost. ALL HAIL DENISKA!!!

[seesoe]

o i c your problem, yes the serial port is not activated if the headphone jack side has something plugged in

[vibez]

Just ordered all the gear to make my cable. I have a question about identifying pins with a multimeter.

How will I know which pin is which by resistance?

Could you maybe add a simple guide on identifying pins please.

[seesoe]

no just put the multi meter on one end of the wire and the other on a pin if u see any change on the multimeter you will know if its the right pin or no also for the stalk head sets that come http://mc.pp.se/psp/phones.xhtml