The hex code is part of a Mode S
transponder configuration. Mode A/C
transponders don't have a code.

The Trig Avionics website has the
Installation Manuals where you can read
up on Mode S transponder configuration.

At 13:46 21 March 2015, Richard wrote:
On Saturday, March 21, 2015 at 6:23:23
AM UTC-7, JJ Sinclair wrote:
OK, I updated my FLARM to 6.0 and
told it my new HEX number (different
sa=
ilplane), but as far as I can see my my
mode a/c transponder doesn't know
m=
y HEX number...............am I missing
something here? How does the FLARM
=
know to disregard my transponder
squalk?
JJ


JJ,

you also need a sentence in the config
file to set the kind of xponder.

# Set what kind of transponder you have
installed:
# 0 ... no XPDR (default)
# 1 ... Mode C
# 2 ... Mode S

# configure transponder type
$PFLAC,S,XPDR,2


Richard
www.craggyaero.com