PilotAware Rosetta- Trig TT21- Wiring Loom - F I X E D

[Admin]

Actually PAW feeds the NMEA messages which DO NOT include a barometric altitude, only a GNSS altitude
There is a supplementary $PGRMZ, which we also supply (Garmin format)
http://aprs.gids.nl/nmea/#rmz
but pretty sure the transponder will ignore this

[Gramac]

I’ve just recalibrated my altimeter and then the transponder setting to corroborate the altimeter. It was out about 150 ft in fairness so I will ask ATC to see if it is resolved.

[steveu]

Just used this topic to help in getting ADS-B out working on a TT21.

All very straightforward. the job was made easier by the TT21 wiring loom having a flying lead for pins 4&5 coming out to allow easy termination for the connection of the mentioned Farnell USB to tails adaptor.

The GPS In was enabled as uncertified, the GPS input status was seen on the second press of the Fn button, and the ADS-B out was seen on the local ATOM ground station.

Thanks to everyone for their contributions.