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Re: New TinyTrak Group Member 8000FA Questions.

 

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Thanks for the tip on non-MIC-E. I will disable that and SB.

My GPS BR355 does not have a connector on it. Only wires - Green, White, Red and Black. So I soldered the wires to a DE9F accordingly. Here is where I got the pin-outs:


In the schematic this website it shows White as TX and Green as RX - opposite from what Robs website says. I will disconnect the White wire and connect the Green wire and try again. I don¡¯t see an LED on the GPS puck but there may be one there hiding under the ¡°GPS¡± label characters. Also I will know the wiring is correct when I see the Green LED on the mt8k light up and stay on.

Thanks for all the great information.

73
Steve
KD9AER


On Apr 28, 2023, at 6:54 PM, Rob Giuliano via groups.io <kb8rco@...> wrote:

First, I agree with Allen - set a fixed TX rate (non-SmartBeaconing), non-Mic-E and decode it locally from another radio - if possible.

Main website I looked at:

HOWEVER, since you need whatever interface cable to the MT8k, you should still find a way to verify the RS232 output from the GPS in a PC terminal?
?? A quick search on GPS BR355 shows a module with a 6-pin miniDIN. Is that how yours is configured?
?? If this is a 6-pin MiniDIN (according to the couple of websites) pins 1 (Gnd) & 2 (V+) are used to power the GPS puck.
????? I didn't find any reference to Data lines (in or out)
? ? ? The sites reference an optional (additional) PS-2 to RS232 adapter.? Are you using it, or did you make your own?
? ? ?? ? The BR-355S4(5Hz) uses a proprietary pin-out on the PS2, which cannot be connected directly to any laptop or PC without the use of a cable set (USB or RS232 + PS2 for power).

From your description of your setup, are you sure the GPS has a fix (BR355 says it has an LED indication of fix)?

According to this site:
?? Green is TX from the GPS (output to attached device) and White is RX to the GPS (input from attached device).

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