SDS100/SDS200: SDS100, GPS not working

[hydes2004]

I am using an RS232 NMEA simulator from my PC. I have it wired to ground and the ID pin on the mini USB. I am unable to receive any GPS data. If I plug the SDS100 into my PC and mount it as a serial device I can send the same NMEA strings over the raidos serial port and it works. I have the baud rates all set correctly.

Any ideas?

 

[jtwalker]

Yes, get a Uniden gps puck & cable.

Why would you subject yourself to such a headache and what is your ultimate goal with this?

 

[hydes2004]

Mocking up my cable because I have a handle full of rs232 receivers laying around….

 

[dave3825]

I am using an RS232 NMEA simulator from my PC. I have it wired to ground and the ID pin on the mini USB. I am unable to receive any GPS data. If I plug the SDS100 into my PC and mount it as a serial device I can send the same NMEA strings over the raidos serial port and it works.

Why simulate? Just get what's intended to work with the radio.

 

[hydes2004]

I’m using a simulator to make sure it works prior to finalizing everything. I work with GPS for a living. For some reason it does not see any data on that ID line. I checked it with a scope and logic analyzer. It’s there. If I connect scanner to my PC and mount it as a serial port, it passes the data fine…..

 

[nessnet]

The GPS data port is not the same as the serial data port used for programming.
You have to be using a 5 pin connector....

Looking for the pinout for the GPS interface on the SDS100

 

[hydes2004]

I am, I bought raw connectors and soldered the +5, gnd, and Id lines

 

[dave3825]

I’m using a simulator to make sure it works prior to finalizing everything.

Sorry, make sure what works prior to finalizing everything? You use gps with scanner. It reads your location. It loads what's around you. It's that simple.

 

[nessnet]

I am, I bought raw connectors and soldered the +5, gnd, and Id lines

Hmmmmmm. (?)

Just to check - what baud rate?
(The 100 is 4800)
Maybe try swapping that ground and ID around....?

 

[hydes2004]

Dave3825, I know that. I am bench testing that everything works prior to heat shrinking everything… I am using the simulator to output NMEA0183 data over an RS232 comm port. No need for you to reply to this thread anymore.

 

[hydes2004]

Hmmmmmm. (?)

Just to check - what baud rate?
(The 100 is 4800)
Maybe try swapping that ground and ID around....?

Worth a shot. I just find it odd I cannot get it to work

 

[dave3825]

I know that. I am bench testing that everything works prior to heat shrinking everything…

Why not just punch in a zip (90210) into the scanner, let it load, then plug in gps? If it finds you and loads your stuff, it works.

No need for you to reply to this thread anymore.

 

[nessnet]

Worth a shot. I just find it odd I cannot get it to work

I couldn't get my homemade power/GPS to work and was vexxed.
I swapped the two and voila...
Not sure if it was bad info (from RR), or some cables have them swapped - but that was the ticket for me.

 

[nessnet]

Why not just punch in a zip (90210) into the scanner, let it load, then plug in gps? If it finds you and loads your stuff, it works.

If the GPS icon isn't showing on the screen - it is not receiving NEMA data...

 

[dave3825]

If the GPS icon isn't showing on the screen - it is not receiving NEMA data...

Correct. Boils down to a wire or 2 in the wrong spot. Been there, done that myself. Never heard of using a simulater to correct a wiring issue.

 

[hydes2004]

Not sure how I could have wired it wrong. Gnd to pin 5, I’d to pin 2. Much easier to wire up using a simulator to prove it out. I know the simulator works.

 

[RMason]

if you haven’t already done so, you may want to review this thread

Looking for the pinout for the GPS interface on the SDS100

Does anyone have or have come across the pinout for the two accessory connectors on the Uniden SDS100? UPMAN, can you help us out as these are absent from the manuals I've come across so far.

forums.radioreference.com

 

[hydes2004]

Just read it, it’s wired correctly……..


Gonna try a reset and see what happens. Doesn’t make sense

 

[nessnet]

if you haven’t already done so, you may want to review this thread

Looking for the pinout for the GPS interface on the SDS100

Does anyone have or have come across the pinout for the two accessory connectors on the Uniden SDS100? UPMAN, can you help us out as these are absent from the manuals I've come across so far.

forums.radioreference.com

Uhhhh... did you see post #6??
(Sorry... couldn't resist when I see the same advice - twice in the same thread...)

 

[RMason]

Uhhhh... did you see post #6??

Also #3 and #13.

The only quirk is that the GPS input goes to the ID pin (next to ground) of the USB mini Jack

ID is pin 4, which wire is this?

Connect the data coming from the GPS to that ID pin.

Help me understand what I’m missing. I believe you have ID connected to pin2?

Not sure how I could have wired it wrong. Gnd to pin 5, I’d to pin 2.