[time-nuts] Re: Lady Heather with my own GPSDO

[Bob kb8tq]

Hi

The “easy” way would be to set it up so that it comes up looking
like a device LH already knows about. Pick one that’s easy to clone
and just duplicate the messages from that device. 

Bob

> On Nov 22, 2022, at 3:45 AM, Pluess, Tobias via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Hi list,
> I would like to adapt the firmware of my own GPSDO such that it can be
> interfaced to Lady Heather.
> I see different possibilities.
> a) use NMEA-like output with the $P prefix. For test purposes, I have
> implemented a $PTEST NMEA sentence which outputs the DAC value, the OCXO
> current and the board temperature. I modified the source code of LH
> slightly such that it receives these $PTEST sentences and displays
> corresponding messages on the terminal. So far it works, the received data
> is successfully received, decoded and displayed as shown in the screenshot.
> However, I am unsure if this makes sense, as LH still cannot easily be told
> to display these data in the chart.
> b) implement a SCPI like interface on my GPSDO such that LH can talk to it
> and query all the necessary data.
> 
> c) are there other possibilities? has anybody ever tried to interface a
> self made GPSDO to LH?
> 
> thanks,
> best
> Tobias
> HB9FSX
> 
> 
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