Andrew G
Well-Known Member
Norman_E,
If I may be a little pedantic, SeaTalk is not realy NMEA with a different cable. NMEA transmits ASCII text strings across a backbone as you rightly say. Simple applications like Windows HyperTerminal can see and record the strings. SeaTalk is different - it is a binary transmission, using a proprietry protocol, and it needs a a small elctronics circuit between the instrument and a non-SeaTalk device (eg a PC or NMEA) to invert the voltages. Angus' YAPP contains the elctronics and does the conversion of SeaTalk binary to a visable output. I've spent months on this and if you look at post #47 on the thread below you'll detect my glee:
http://www.ybw.com/forums/showthread.php?278332-YAPP-Homemade-Seatalk-to-USB-interface
Thomas Knauf gives the best description I've seen: http://www.thomasknauf.de/seatalk.htm
There a several commercial SeaTalk to NMEA converters costing many times Angus'. I've found Fank Wallenwein at:
http://www.gadgetpool.de/nuke/modules.php?name=News&file=article&sid=28
to be extremly helpful.
But if you want to make it yourself then Angus' YAPP is the way to go.
Cheers,
Andrew
If I may be a little pedantic, SeaTalk is not realy NMEA with a different cable. NMEA transmits ASCII text strings across a backbone as you rightly say. Simple applications like Windows HyperTerminal can see and record the strings. SeaTalk is different - it is a binary transmission, using a proprietry protocol, and it needs a a small elctronics circuit between the instrument and a non-SeaTalk device (eg a PC or NMEA) to invert the voltages. Angus' YAPP contains the elctronics and does the conversion of SeaTalk binary to a visable output. I've spent months on this and if you look at post #47 on the thread below you'll detect my glee:
http://www.ybw.com/forums/showthread.php?278332-YAPP-Homemade-Seatalk-to-USB-interface
Thomas Knauf gives the best description I've seen: http://www.thomasknauf.de/seatalk.htm
There a several commercial SeaTalk to NMEA converters costing many times Angus'. I've found Fank Wallenwein at:
http://www.gadgetpool.de/nuke/modules.php?name=News&file=article&sid=28
to be extremly helpful.
But if you want to make it yourself then Angus' YAPP is the way to go.
Cheers,
Andrew