The DB-9 on the 302 is a standard RS-232 interface so if you want to connect it to any device like the Avier that is expecting USB you'll need to do a data conversion in between. Cumulus-Soaring sells their Goddard branded cables that will do this conversion. I think the website calls it a 302 to Oudie cable but I believe its the same thing - just a simple USB conversion.. The 302 RJ-45 port outputs I^2C so a similar conversion box could be built with an RS-232 to TTL converter and an Arduino if you wanted to get deep into the weeds. Are you in the USA? I have one of the Cumulus Goddard 302 to Oudie cables I don't need if you're interested in trying that route. Make me an offer.

Robert

On Tuesday, January 7, 2020 at 10:13:47 AM UTC-6, wrote:
Does anyone have the pin-out diagram / specifications for the AVier navigation display unit? It's an old unit, and I'm looking for a suitable display for my Cambridge 302A data logger. A fellow club member gave me an AVier display to evaluate, but none of the cables provided with the AVier unit have a correct interface with the 302A, so I'm trying to manufacture an appropriate cable for this interface. The 302A data output is a 9-pin connector, and the AVier appears to be a mini-USB input connector. Thanks in advance for your help!

Boomer
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