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XPDR Air Type Transponder v2.4

This XPDR requires only 1 antenna to function since it's built for half-duplex operation.
It may miss some "ping" during sending "ack". (Limitation of being half-duplex)
Don't worry because the SSR will retry in next few ticks.


This device default start with squawk code 1200 for general aviation.
Set your assigned squawk code, the device will announce itself every few seconds when not getting a ping from any SSR station.
This device response with GPS data and altitude when pinged with assigned squawk code.
(also include 6-char aircraft type in reply)
The "ID" button for "IDENT" will send the "IDENT" signal when response to ping.
The "ID" button will stay glow for a short duration and reset itself.


2020/02/12 This device is now with built-in memory to save callsign assigned by SSR station.
2020/09/03 Default Callsign and Default Squawk code are now configurable from workbench.
2020/09/09 Lowercase in default callsign does not show to ATC → fixed forced CAPS now.



Has receive and transmit indicator on screen

*This XPDR never report heading or speed*
Heading and speed will be calculated by ATC controller on ground (SSR)



Due to being forced to use new antenna, the V1 requires 2 antennae to keep full-duplex mode functioning.

See XPDR v1 for Full-duplex built
https://steamcommunity.com/sharedfiles/filedetails/?id=1775297695