I was able to interface an Android to a Cambridge 302 using a K6BT
serial to Bluetooth converter. It's one of the more expensive
converters on the market and you can certainly find something less
expensive.

When I upgraded to a ClearNav system and added a PowerFlarm, I retained
the K6BT and added another one so that my wife's Android could still
enjoy receiving all of the information via Bluetooth while my ClearNav
system worked via serial cables. We fly a two-seater. I used simple
RJ-45 splitters to implement the wiring.

To get your silver badge and beyond you'll need a calibrated and sealed
recorder. You'll probably need to send the Cambridge unit to Gary at
ClearNav or Paul at Cumulus Soaring or Rex at Williams or Richard at
Craggy or... All of us old timers got all of our badges and diamonds
with a camera and barograph (which we had to send in for
calibration/sealing). The logger is much easier to get everything in
order. You'll still need to do the flying yourself!

Good Luck!

On 1/30/2017 1:59 PM, Paul wrote:
Thanks for all the input! I'm really glad to hear my vario should still be able to function OK (not hobbled by old pressure transducers or slow CPU).

My Kobo isn't tied to the vario, but I'm going to look into doing that, as waremark mentioned. The odd vertical thing is a G meter, by the way. The dash speaker is inop, there's a speaker in back, so that space is available. I think I'll just paint, label and maybe rearrange (thx for the suggestions, ND) the panel, and leave well enough alone... for now!

--
Dan, 5J