DIY: Simple PSP-GPS hookup

so.. now I removed the 1KOhm Resistor and it's something different now when I am going to start the GPS mode in MapView....
Before I removed the Resistor MapThis was showing "OUT of Range" and Speed (but I wasn't driving) and 8 Satellites when I enabled the GPS mode.....
But the MapView App showed a Arrow somewhere near NewYOrk... but I'm from Germany!!!

Now... after I removed the Resistor MapVIew dosen't show the " OUT of Range message" and the Speed and number of satellites....

DATA: BAD
Satellites:0
SPeed: --
and so on....

No data.......

but something changed!!!


And the App with the Green Background anly shows that I must plugin the GPS and switch it on... but it is on and plugged in!!!


Now I will solder something different and I will post my Progression here!!

Nice stuff only if you could do it without all the cutting and stuff ;-)

Quote:

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Originally Posted by kamatschka

so.. now I removed the 1KOhm Resistor and it's something different now when I am going to start the GPS mode in MapView....
Before I removed the Resistor MapThis was showing "OUT of Range" and Speed (but I wasn't driving) and 8 Satellites when I enabled the GPS mode.....
But the MapView App showed a Arrow somewhere near NewYOrk... but I'm from Germany!!!

Now... after I removed the Resistor MapVIew dosen't show the " OUT of Range message" and the Speed and number of satellites....

DATA: BAD
Satellites:0
SPeed: --
and so on....

No data.......

but something changed!!!


And the App with the Green Background anly shows that I must plugin the GPS and switch it on... but it is on and plugged in!!!


Now I will solder something different and I will post my Progression here!!

---

that gps set up seems to be way over your head.
using the gpslim 236 set up is so easy.
maybe you should consider investing in a gps
that mapthis! was intended to be used with.

on my GPS device is a kind of electric mechanism which turns the GPS on when It's plugged in in th Mobile Phone.... thats the reason why the PSP couldn't receive any Data from the GPS.....

now I actually purchased the holux !!!

:) :) :) :D :D :D

Hi!:confused:

I'm Spannish and I don't understand quite well what you've said. I explain:

1) I would to know what the different compiles are ( ex 4.800 bauds, 11.250...). What function do they have??? I've seen the same programs ( EBOOT) but with different bauds.

2) I've read something about log.txt . I think it was about the program and I don't know what it is.

3) Another thing, I want to know why the map is something in the incorrect position (beating) , I've read something in the forum but I don't know why it happens.

I've HOLUX 236 SLIM

Thanks!:)

which device should i buy??

anybody know if these work / how to wire them

TOMTOM bt77
TOMTOM BT74R

or the Holux GR213 (U)

all listed on "e**y"

thanks in advance

Quote:

---

Originally Posted by kamatschka

so.. now I removed the 1KOhm Resistor and it's something different now when I am going to start the GPS mode in MapView....
Before I removed the Resistor MapThis was showing "OUT of Range" and Speed (but I wasn't driving) and 8 Satellites when I enabled the GPS mode.....
But the MapView App showed a Arrow somewhere near NewYOrk... but I'm from Germany!!!

Now... after I removed the Resistor MapVIew dosen't show the " OUT of Range message" and the Speed and number of satellites....

DATA: BAD
Satellites:0
SPeed: --
and so on....

No data.......

but something changed!!!


And the App with the Green Background anly shows that I must plugin the GPS and switch it on... but it is on and plugged in!!!


Now I will solder something different and I will post my Progression here!!

---

I have some questions about your testings:

Did you put and select the map for your exat location in germany - I dont think so! and if it's says OUT OF RANGE its because it CAN get a LAT/LONG!!!!!!!! so your first setup must have worked...

Rewire all together and get a map of your location!!!

Quote:

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Originally Posted by eothraim

Hi!:confused:

I'm Spannish and I don't understand quite well what you've said. I explain:

1) I would to know what the different compiles are ( ex 4.800 bauds, 11.250...). What function do they have??? I've seen the same programs ( EBOOT) but with different bauds.

2) I've read something about log.txt . I think it was about the program and I don't know what it is.

3) Another thing, I want to know why the map is something in the incorrect position (beating) , I've read something in the forum but I don't know why it happens.

I've HOLUX 236 SLIM

Thanks!:)

---

1) Diff bauds for diff equip. it's the speed for data comm. through the serial between that device and MapThis! that is customisable via "config.txt" - don't have to recompile the source

2) log.txt? don't know if it's the log I've put to show some warnings during complile...

3) Don't know why... I gues it got something to do with google's...

Quick question, my TXD voltage measured 3v. what size resistor do I need?

Quote:

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Originally Posted by vibez

Quick question, my TXD voltage measured 3v. what size resistor do I need?

---

Well, lets say you want 2.5v@500mA:
by Ohm's Law,

2.5 V
---------- = 500 Ohm
0.005 A

The fromula I was using is

R=V/I

Resistance(R)= Voltage (V) / Current (I)

I thought (R) was the voltage drop. 3 volts down to 2.5v = 0.5voltage drop.

Where did you get the 500mA value from?

Here is the formula I used

http://led.linear1.org/1led.wiz?VS=3;VF=2.5;ID=500

It shows I need a 1/2W or greater 1 ohm resistor

Quote:

---

Originally Posted by vibez

The fromula I was using is

R=V/I

Resistance(R)= Voltage (V) / Current (I)

I thought (R) was the voltage drop. 3 volts down to 2.5v = 0.5voltage drop.

Where did you get the 500mA value from?

---

No, R is the resistor value in Ohm...

500mA was a guess, for demo pourpose only... don't know that for sure... probably is a bit high and thus less conservative. I may have to advise you to go for a lower one: 200 or 250mA giving a resitor of ~1KOhm

Tried to check that in ps2dev but the site is down...

P.S.: That formula is known as Ohm's Law ;)

Hi guys, I got my gpslim236 receiver today, and I've had trouble getting it to work. I made the cable as directed and have tested it with a multimeter. When I use the green screen app, I can see NMEA sentences popping up every second or so, but the Longitude and Latitude values (among others) aren't showing up.

I tried measuring the voltage between pin1 and pin3 on the gps device, and it says its 3V. But when I hook up the cable (with the 1k resistor) and measure it, the voltage stays the same. Could that be the problem? Isn't the voltage supposed to drop because of the resistor?

Thanks
Sorry, newbie here :P

Quote:

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Originally Posted by Rengoku

Hi guys, I got my gpslim236 receiver today, and I've had trouble getting it to work. I made the cable as directed and have tested it with a multimeter. When I use the green screen app, I can see NMEA sentences popping up every second or so, but the Longitude and Latitude values (among others) aren't showing up.

I tried measuring the voltage between pin1 and pin3 on the gps device, and it says its 3V. But when I hook up the cable (with the 1k resistor) and measure it, the voltage stays the same. Could that be the problem? Isn't the voltage supposed to drop because of the resistor?

Thanks
Sorry, newbie here :P

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Don't seem to have a problem... use the latest MapThis and test you new cable with it. It shouldn't be a major problem deal with 3v for the PSP...

Quote:

---

Originally Posted by vibez

Here is the formula I used

http://led.linear1.org/1led.wiz?VS=3;VF=2.5;ID=500

It shows I need a 1/2W or greater 1 ohm resistor

---

You can use that... keep in mind that power dissipation only depends on input voltage.

If it doesn't work try 500Ohm.

Quote:

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Originally Posted by fokia

Don't seem to have a problem... use the latest MapThis and test you new cable with it. It shouldn't be a major problem deal with 3v for the PSP...

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Still no luck :( I tried it with the latest MapThis, and it says it's out of range and Data:Bad.

Quote:

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Originally Posted by Rengoku

Hi guys, I got my gpslim236 receiver today, and I've had trouble getting it to work. I made the cable as directed and have tested it with a multimeter. When I use the green screen app, I can see NMEA sentences popping up every second or so, but the Longitude and Latitude values (among others) aren't showing up.

I tried measuring the voltage between pin1 and pin3 on the gps device, and it says its 3V. But when I hook up the cable (with the 1k resistor) and measure it, the voltage stays the same. Could that be the problem? Isn't the voltage supposed to drop because of the resistor?

Thanks
Sorry, newbie here :P

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Keep in mind that your multimeter would probably display just an average voltage for that AC current...
The danger comes from peaks that could be higher than 3V...
The multimeter would not show the peak voltage, because it's not just fast enough for the transmission frequency... for that reason you probably wont see the drop on your resistor, but your PSP just might feel it...

Heres a screenshot of what I'm getting with the gpslim236. I noticed the date is wrong, but I checked the psp date settings and it was fine.

http://img176.imageshack.us/img176/5...slim236ki3.jpg

You dont have a clear view of sky.

yep, your gps did not lock on any satelites yet..
it takes ~40sec for GPSlim to get the lock in clear skies, assuming your dont move the unit during the acquisition period.
The time is GMT (assuming it had a lock, overwise it's some garbage)

If you continue having difficulties locking on satelites, consider changing the unit. Unfortunately, there are reports of many defective gpslim236 units outthere...
The good thing - your communication part & cable work ok ;-)

Yay, its working finally. Turns out I simply didn't give the GPSlim enough time to lock onto to the satellites. Thanks guys for the help :)

Deniska, you did an awesome job on this, you got my vote for the competition ^^

I got my GPSlim unit made my cable and the GPS screen works like a chamr I haven't loaded up Map This ! but will be trying that tongiht. Thanks for the info and help this thing rocks.


I have a noob question about testing the voltage from the GPS Unit. How do I test this with my mulitimeter ? Like where does the Red pin go and where does the black pin go to test the output voltage to make sure everything is good. Like I said all works I just want to make sure on the voltage, I am far from an electircal engineer, thanks guys.

Quote:

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Originally Posted by steve_bk

I got my GPSlim unit made my cable and the GPS screen works like a chamr I haven't loaded up Map This ! but will be trying that tongiht. Thanks for the info and help this thing rocks.


I have a noob question about testing the voltage from the GPS Unit. How do I test this with my mulitimeter ? Like where does the Red pin go and where does the black pin go to test the output voltage to make sure everything is good. Like I said all works I just want to make sure on the voltage, I am far from an electircal engineer, thanks guys.

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I don't think you can get an accurate voltage reading with a multimeter in this case... the idea is to start with high resistor values (say, 5K) and keep lowering the resistence until you get a stable reading...

I think I have a stable reading on your green screen if that is what you mean. Work fine no problems. I just wanted to make sure the volatge comign from the GPSlim through my cable with the 1k resitor was doing ok, from what you replied I gather I can't get this reading from a multimeter.

so.. I have actually received my Holux gpSlim 236 and neither the Greenscreen Programm nor the MapView is working with it...

I made the data Cable with an 2 KOhm resistor... but there is no reaction in the Greenscreen Programm or in MapView itself!!

so.. I tested the Cable with an Multimeter and its just fine wired and soldered....

And the GpSlim locked on satellites....

so.. is it because i used a 2KOhm resistor??
Or did it work for someone with a higher valued resistor than 1KOhm?

Quote:

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Originally Posted by kamatschka

so.. I have actually received my Holux gpSlim 236 and neither the Greenscreen Programm nor the MapView is working with it...

I made the data Cable with an 2 KOhm resistor... but there is no reaction in the Greenscreen Programm or in MapView itself!!

so.. I tested the Cable with an Multimeter and its just fine wired and soldered....

And the GpSlim locked on satellites....

so.. is it because i used a 2KOhm resistor??
Or did it work for someone with a higher valued resistor than 1KOhm?

---

There are reports from someone that even using GPSlim236 the only way to make it work was WITHOUT any resistor (while using stripped sony's remote)

so.. i found now my 1KOkm resistor and soldered it and now it's working.....

So.. I think... with resistors above 1Kohm it does not work!!!!!

Yeehaaa...
I get it finally working!!! :D :cool:
Thanks to all who helped me!!!
especially fokia !!!

greets kamatschka

Quote:

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Originally Posted by kamatschka

so.. i found now my 1KOkm resistor and soldered it and now it's working.....

So.. I think... with resistors above 1Kohm it does not work!!!!!

Yeehaaa...
I get it finally working!!! :D :cool:
Thanks to all who helped me!!!
especially fokia !!!

greets kamatschka

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I'm gad you made it!!!!:) :D :) :D :) :D

FYI

I used an official Sony Remote + a Pelican USB cable ($4.99 from walmart) and a 1k ohm 1/4 resistor with the GPSLim 236, everything is working fine.

I used the sony remote w/o resistor. I been using about 2 weeks, no prob

Quote:

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Originally Posted by Blac OrKhiD

I used the sony remote w/o resistor. I been using about 2 weeks, no prob

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Yeah, psp could probably tolerate the GPSlim236 output level in most (if not all cases), but I placed the resistor in in the public drawing just to make sure it is safe, and noone bricks the PSP because of this...

I read recently that the some of the components on TA-082 motherboards operate on 1.8VDC vs 3.3VDC for TA-079, 80, 81 mobo's.

It may not be applicable for the serial port though, but you may want to make a cautionary note to TA-082 people to use caution, as I think there is a downgrader coming for those motherboards.


I imagine it will be possible to get data from USB for the Sony GPS unit. I wonder how they could prevent homebrew from accessing the USB?

The benefit to our setup is that we can use the Camera AND the gps at the same time!


I think the next version of MapThis should have a "show tracks", "save tracks", "erase tracks" feature.

Also, I mentioned a while back about an "Open" mapping project at Sourceforge. It's www.OpenStreetMaps.org It appears to be in the early stages.

Also TigerMaps is (US) a server that has free (but dated 1998) maps.

Ive got MS Streets and Trips on my laptop, that has the entire US streetmaps + poi's etc and it takes up 936mb of space. The map "data" folder is ~900mb.

What are the legalities of making a program that uses the map data of software that you legally own on a platform that it was not written for?
(Ive also got Garmin Mapsource too)

Which leads me to one more question:
There are tons of emulators of other gaming consoles for the PSP. Legalities aside, would it be theoretically possible to emulate some of the commercial GPS-Navigation units on the PSP?
I think the PSP has all the processing and graphics abilities, including voice prompting (And theoretically voice commands (Look at Talkman)). The only thing not available is touch screen. (Unless an external overlay were developed).


Densika, Thank You for making MapThis!

Quote:

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Originally Posted by deniska

Yeah, psp could probably tolerate the GPSlim236 output level in most (if not all cases), but I placed the resistor in in the public drawing just to make sure it is safe, and noone bricks the PSP because of this...

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I wouldn't encourage anyone not to use the resistor
I still plan on installing a resistor when i rebuilt my cable. it's better to be on the safe side.

Quote:

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Originally Posted by A Fn NOOB

Which leads me to one more question:
There are tons of emulators of other gaming consoles for the PSP. Legalities aside, would it be theoretically possible to emulate some of the commercial GPS-Navigation units on the PSP?
I think the PSP has all the processing and graphics abilities, including voice prompting (And theoretically voice commands (Look at Talkman)). The only thing not available is touch screen. (Unless an external overlay were developed).

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i have always had that idea in my head since a few days after i found mapthis news,
i agree i think with enough hardware and programing work, the psp can emulate. the mic part would not be that hard, but maybe the part of haveing the headphone jack plugged in and not get sound out of speakers *if im niot mistaken someone from this forum is testing out how to get the sound from usb? with those docking stations, i forget exactly what it was he gonna try* touchscreen overlay is not needed just a waste of codeing and money for the overlay and hardware hack

Yea, so I was very excited that my gps came yesterday. I got the 236. Anyway, I never soldered a thing in my life. So I cut the usb and stripped it. I found the ground and the TDX wire, except it was green. Then I got the plug from the orignal psp remote. But I pulled out all the wires bc from the pic, it looked like the usb wire was soldered directly onto the plug. well, now I know thats not it and i gotta now spend anoter $10 for a remote. Anyway, what color is the wire on the remote for tdx wire? i know ground is black. Id appreciate any help

Finally got round to building my cable. My TXD wire was indeed green and I soldered everything straight to the headphone plug. Everything works fine :) Thanks to fokia who helped me with my question about working out what size resistor to use (1Kohm worked btw) and thanks to densika and in7ane

Quote:

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Originally Posted by jyhuh

Yea, so I was very excited that my gps came yesterday. I got the 236. Anyway, I never soldered a thing in my life. So I cut the usb and stripped it. I found the ground and the TDX wire, except it was green. Then I got the plug from the orignal psp remote. But I pulled out all the wires bc from the pic, it looked like the usb wire was soldered directly onto the plug. well, now I know thats not it and i gotta now spend anoter $10 for a remote. Anyway, what color is the wire on the remote for tdx wire? i know ground is black. Id appreciate any help

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On my Original Sony Remote the GROUND was the BLUE wire and the TxD was the GREY Wire ......

but it could be that it's different on your Remote.....

Anyway Try to find out which wire belongs to GROUND and wich WIRE to TxD.....
Use a Multimeter......


Greets kamatschka

jhuh I dont think you have done anything wrong as far as I can tell. You are soldering to the headphone plug.

The easiest way I found to make sure you have the right wires on the usb side is just to rip the covering off the large usb plug you removed and use a pinout diagram to see which color wire is conected to which pin

well, i did solder the wires on directly onto the plug, but its so damn small, i was afraid that the solder was touching more than one pin. I didnt want to take any chances in bricking my psp so I just thought itd be easier soldering wires together. anyway, is there a place that sells psp remote for less than $15? I looked at wal-mart... they didnt have any