Dennis, I fooled around with PUBX 41, and can't get the board to respond. I think that with the original board, I *once* got some PUBX messages, but at this point I am only seeing NMEA broadcasts. That once may have been when I was using a serial port instead of the USB I'm using right now. This evening I will get in with the scope and do come comparisons on the 10-pin connector to see if there are differences between then the UT+ is plugged in and the SSR-6tru mounted on the adapter card. I have an ftdi adapter that I may put on as well if nothing else gives any results.
I don't have the ability to deal with those .05" spaced pins on the GPS board's connector, or to supply the 3V power. But, if needs be, I can get a connector, put in a 3V regulator, and give that a try. Come to think of it: one of my little USB to TTL adapter boards can supply 3V. Maybe I can use some mini-clips to jumper directly to the .05" pins on the GPS board, let the USB adapter supply the 3V, and give that a try. I'm a bit leery of going that route, though. If I get pins mixed up and blow the board I've wasted all this time for nothing. Bob ________________________________ From: Dennis Ferguson <dennis.c.fergu...@gmail.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Cc: Bob Stewart <b...@evoria.net> Sent: Tuesday, July 15, 2014 11:46 PM Subject: Re: [time-nuts] Synergy-GPS SSR-6tru problems On 15 Jul, 2014, at 16:32 , Bob Stewart <b...@evoria.net> wrote: > I do not know what the problem is. The UT+ works (with the appropriate > software). The SSR-6tru is deaf using all the software I have available to > me. I am at my wits end, and I have nothing else that I can think of to try. I've got several of these boards and they've worked okay for me without doing anything special. I have not tried the software you are using, however, nor do I use the adapter you mention (does that adapt the connector on the SSR-6tru to a connector that fits your UT+ board?). I made a connector to talk to mine directly from a 3 volt serial port in a BBB SOIC. Since you can see the NMEA sentences the transmit side of the serial port from the LEA-6T is clearly working and you have the baud rate right, but your symptoms suggest the module doesn't hear you. Have you tried looking at the basic connection, i.e. that the serial port receive pin on the module wiggles at the right voltage and polarity when the software tries to send stuff (maybe there are two ways to plug in the adapter, only one of which works)? If that looks okay then the only other guess I can think of is that the software is trying to talk to the board with u-Blox binary messages but that protocol has been turned off for input on the port (the PUBX,41 NMEA sentence can turn it on and off), but that seems unlikely since, no matter how I reconfigure mine, a power-on reset always sees the serial port come up willing to receive either protocol. Dennis Ferguson _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.