Hi,
I have a Stowe Databox connected via a NMEA to USB adapter to a PI 4. All the NMEA sentences, except for one, are standard and display correctly in the data browser in Signal K and in the dashboard in Opencpn.
The non standard sentence is DBK. It has an additional character in the first position. Either an "A" if depth is live/correct or a "V" if it is last valid depth. I need to strip the first field containing this character out of the sentence.
This seems easy enough if I ignore Signal k and run the serial input directly to Opencpn as the NMEAconverter plugin can modify NMEA sentences.
However I would like to stream all data through Signal K. Is there a simple way to see the raw NMEA 183 data that Signal K is receiving and to modify it before SignalK parses it?
I see an option for Data fiddler. Could this be used to remove the first field?
Will I have to learn Node Red !!
Jodel
Subsequently noticed that the Stowe instruments also send DBT (Depth below the transducer).
This sentence is standard and I use that instead of DBK. As I have a lift keel boat there is very little difference between DBK and DBT when the keel is lifted. When the keel is down, I know that I need about a metre below transducer to avoid touching the bottom.
I have a Stowe Databox connected via a NMEA to USB adapter to a PI 4. All the NMEA sentences, except for one, are standard and display correctly in the data browser in Signal K and in the dashboard in Opencpn.
The non standard sentence is DBK. It has an additional character in the first position. Either an "A" if depth is live/correct or a "V" if it is last valid depth. I need to strip the first field containing this character out of the sentence.
This seems easy enough if I ignore Signal k and run the serial input directly to Opencpn as the NMEAconverter plugin can modify NMEA sentences.
However I would like to stream all data through Signal K. Is there a simple way to see the raw NMEA 183 data that Signal K is receiving and to modify it before SignalK parses it?
I see an option for Data fiddler. Could this be used to remove the first field?
Will I have to learn Node Red !!
Jodel
Subsequently noticed that the Stowe instruments also send DBT (Depth below the transducer).
This sentence is standard and I use that instead of DBK. As I have a lift keel boat there is very little difference between DBK and DBT when the keel is lifted. When the keel is down, I know that I need about a metre below transducer to avoid touching the bottom.