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 [image: image.png]

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@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 > > > [image: image.png] > <image.png>_______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com