NASA AIS Engine to USB

[PaddyB]

The NASA AIS puts out a sort of RS232
I use a serial to USB adapter myself ( prolific chipset )

Your adapter is NMEAv2 to USB
You can try R(eceive) + and -

Pin2 -> R+
Pin5 (shield) -> R-

If it does not work you can try to connect NASA pin5 (shield ) to GND instead of R-
Either may work.

Googling RS422 vs RS232 can provide more technical info since NMEAv2 is electrically RS422


Regards,

Thanks for that, I am 50 miles from the coast so going to struggle to get a signal at the moment, otherwise I would have just kept swapping them about.

Mine outputs a dummy message when it powers up, which shows up in Opencpn. Just pull out the power lead and push back in. On the usb/serial it's wired to recieve and ground. Works fine.

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