At 23:53 21 March 2012, Chris wrote:
Mike C wrote:

On Mar 21, 5:29 pm, Chris wrote:
I just build a device at my own design that meets your
description. As I
am working nonprofit too, there is no competition. If
interested, we can
share information. I have a dealer in Hong Kong who sells
the modules
for
~8,- ? with free shipping. With a MAX3232 for the RS232,
printed circuit
board and casing, I think your price is realistic.

Nice featu as the module is programmable, I set it up
with the
registration of the glider as Bluetooth name.

Will either one work with a VW1150 Canbus and transmit
info two ways
between a Streak and Canbus that contains Powerflarm and
smart vario
data?

I cannot speak for the device offered by Kimmo, but it seems
it works
similar as my design. As Kimmo mentioned, it should work with
any device
that supports Bluetooth and can communicate with Flarm via
the RJ45. The
Bluetooth is just a wireless extension of the serial data channel
via RJ45.
Regards
Chris


Chris,

You are right, in this device all components are well known, and
you can build a similar system out from Bluetooth module and
RS232/TTL level sifter. I actually did so, but the result did not
look like something that I would trust. Also other club members
told me that "nice, but who will maintain those if you are not
here?". So I decided to look for more professional solution. What
was on the market was quite expensive compared to technology
needed.

There is one technical improvement in this device compared
what has been on the market. If you have an external display
connected into your FLARM unit and you want to connect
SoarTronic type device into the same RS232 line with it, you
normally either disconnect the external display's TX line, or add
a switch to select if you what to declare tasks over Bluetooth
device (i.e. RS232 in not multidrop bus). With this "SoarTronic"
you do not need that switch, and these two animals can live
together in RS232 line - as long as they do not speak
simultaneously. This is idea of Simon. I also think that if you
have your FLARM connected to Variometer or VW1150, you can
add this device into the FLARM RS232/power cable. This device
does not have CanBus build in it, but you can connect any
RS232/bluetooth module in the RS232 connector of VW1150.

We have had many gliderpilots involved in this project. It
actually started as a spinn-off. We were (and still are)
developing an interface board to Sparkfun IOIO board, that
connects 4 RS232 lines to Android phone over USB, and
provides 12V/5V conversion for charging the Android device. But
that is an another story.