2020-04-12, 01:14 PM
(2020-04-12, 10:35 AM)Max1947 Wrote: Hello everybody. I wonder if among you very good technicians there is someone who has already made the bidirectional converter Seatalk1 <> nmea following what indicated by Thomas Knauf? It would be useful to me without spending a fortune! I wait offers!I've just been working on this.
I'm taking seatalk 1 from a Raymarine i60 and passing the data via NMEA0183 to my Onwa chart plotter. I was hoping to feed it into my B&G autopilot, but, presently stuck on the B&G interface.
I'm currently using an Arduino Mega as I also use it to convert the Onwa Nmea from V3 to V1.5 (compatability issues with an older B&G) and need the extra hardware ports.
The beauty of using an Arduino, is, all of the data traffic can be echoed onto the USB serial port to feed to my openplotter setup.
The interface circuit shown on the page you mention doesn't work (for me) as it inverts the ST1 signal.
I'm currently connected with a 4k7 resistor and a couple of clamping diodes and that's working fine. The RM i60 seatalk bus only runs at 5 to 6 volts.
Is there anything specific you need to know?
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