[MikeStanley]

Just bought a second hand garmin gps.
It's got the standard garmin to 9 pin serial connector with it.

I want to have a bit of fun and try making a male 9 pin to ipaq serial cable.

Trouble is - I can't find the pinout diagram anywhere on the web - anybody knows where it is or what it is?

Are there any nasties waiting to get me?

Anybody know a good UK source of these ipaq connectors.

Thanks

[MikeStanley]

Just bought a second hand garmin gps.
It's got the standard garmin to 9 pin serial connector with it.

I want to have a bit of fun and try making a male 9 pin to ipaq serial cable.

Trouble is - I can't find the pinout diagram anywhere on the web - anybody knows where it is or what it is?

Are there any nasties waiting to get me?

Anybody know a good UK source of these ipaq connectors.

Thanks

[MikeStanley]

I'd been looking for ages, then a few minutes after posting this I found the following:

http://www.weethet.nl/english/pda_ip...rex.php#direct

The 2210 is the same as the 3800/3900 I believe

[MikeStanley]

Another source close to me revealed this.


IPaq Pin-Outs: (31/36/3700 Series)

Looking at plug with hooks down (female on PDA is 1 thru 12 left to right)

1 V_ADP AC adapter power in RED
2 V_ADP AC adapter power in RED
3 DTR RS-232 Data Terminal Ready
4 GND Power ground BLACK
5 CTS RS-232 Clear To Send
6 RTS RS-232 Request To Send
7 TXD RS-232 Transmit Data WHITE
8 RXD RS-232 Receive Data BROWN
9 DCD RS-232 Data Carry Detect
10 GND Power ground
11 UDC_P USB positive data signal
12 USB_N USB negative data signal


iPAQ 3800 Series Pin-outs, including 2210:


Pin 1 V_ADP RED
Pin 2 V_ADP RED
Pin 3 V_ADP RED
Pin 4 V_ADP RED
Pin 5 Reserved – Do Not Use
Pin 6 RS232 DCD
Pin 7 RS232 RXD
Pin 8 RS232 TXD
Pin 9 RS232 DTR
Pin 10 GND
Pin 11 RS232 DSR
Pin 12 RS232 RTS
Pin 13 RS232 CTS
Pin 14 RS232 RING
Pin 15 GND
Pin 16 No Connect – Do Not Use
Pin 17 USB Detect
Pin 18 No Connect – Do Not Use
Pin 19 USB – UDC +
Pin 20 No Connect – Do Not Use
Pin 21 USB – UDC -
Pin 22 GND

I know a good UK based supplier of the whole cable - just 15 miles down the road from me, very helpful. Ask me if you want to know.

I can't be held responsible if this is not right.

[MikeStanley]

First sign of madness - talking to myself !!!!

Help - let me out >>>>>

[Robb Bates]

Are the RS-232 pins true RS-232? I mean can they handle +/- 12V or are they TTL level or 3V level. I too want to make a GPS interface.

Robb

[Sven]

I would expect you don't want to push to the limits of what RS232 is actually allowed to get to by the standard. I wouldn't be too concerned though, because likely if you are cobbling together a cable to hook to a GPS, you are dealing with a unit that probably runs off 2-4 1.5v batteries anyway.

[Brad Adrian]

Originally Posted by MikeStanley

First sign of madness - talking to myself !!!!

Yeah, I'd say that whenever the first FOUR posts in a thread are from the same person, something is very wrong...

[Robb Bates]

Originally Posted by Sven

I wouldn't be too concerned though, because likely if you are cobbling together a cable to hook to a GPS, you are dealing with a unit that probably runs off 2-4 1.5v batteries anyway.

I agree that I should be careful, but how many batteries a device has usually has very little to do with what voltage it operates at or can tolerate, since they almost always have some kind of step-up or step-down converter on them and of course the I/O ports always operate at completely different voltages. For example, my h2215 has a 3.7V battery but the USB port runs at 5V.

Robb

[MikeStanley]

I have just tried making a cable to link to a gps with one of these plugs - and they are ever so tiny and difficult to work with.

I made a mess of mine and I will buy a cable instead - leave it to the experts with tools for the job.

Let us know if you succeed.

[kzemach]

You all owe it to yourself to start at Larry's page at http://pfranc.com/

In fact, everyone should check it out. It's actually a very interesting story; he was upset that he couldn't get the new eTrex connectors (back when it was new) so he molded his own, and started the "Share Hardware" concept. You can "order" something, and when it arrives, you decide the value and then send money. Anyway, his idea takes off, and it's formed this cooperative community of share hardware sellers, all of whom advertise each other as well as themselves, and help each other. AND give you all the wiring info you want. You can buy just connectors, just cables, connectors to bare cables, and full equipment. Or, they'll do custom for you.

He also has all sorts of info, like how many volts an eTrex can really take in... my favorite cable is one that plugs into the Car cig port, your eTrex, and you iPaq. It a) power the iPaq b) power the GPS (!!) and c) sends data between the two, all for under $60. Cool.