Frequency transmission
Send frequencies from SkyDemon to the radio
Tap the frequency in the app, and you're done: With an SD-Link Bluetooth adapter, you can wirelessly transmit radio frequencies directly from SkyDemon – and just as easily from Sky-Map, VFRnav, EasyVFR, or XCSoar – to your radio. No manual input, no typos during approach.
That's how it works
From app to radio in three steps
The SD-Link adapter sits between the radio and the wiring harness and translates between the wireless app connection and the serial interface of your radio.
- Tap frequency in the app In SkyDemon (or Sky-Map, VFRnav, EasyVFR, XCSoar) you tap the desired frequency – for example, that of an airfield directly on the map.
- Connect to the adapter via Bluetooth The app wirelessly transmits the frequency to the SD-Link adapter via Bluetooth Low Energy. No cables between tablet and cockpit, stable BLE connection.
- The adapter is set up on the radio. The adapter transmits the frequency to the radio via the serial interface – the standby frequency is set without you having to type in a digit.
Many radios support bidirectional communication: if you change the frequency on the device, it will also appear in the app. The exact details depend on the radio and its protocol.
App & radio
Which app and radio do you need?
Frequency transmission works with SkyDemon, Sky-Map, VFRnav and EasyVFR (XCSoar for ATR833 and KRT2). On the radio side, SD-Link offers adapters for the ATR833, TQ KRT2, TRIG TY91/TY92/TY96/TY97, Becker AR620X, uAvionix AV-30, Dynon SV-COM, and a universal solution via RS-232.
The complete compatibility overview shows every app and radio. Unsure which version to choose? The adapter finder guides you to the right one in three steps, and the adapter comparison explains standard, dual-source, angled, and pigtail adapters.
Mounting
Plug-and-play – no soldering required
You plug the adapter between the radio and the existing wiring harness – no soldering, no additional wiring. Power is supplied between 5 and 28 V. Angled versions are available for tight installations behind the radio, and a dual-source version is available for cockpits with EFIS, operating in parallel with the existing EFIS.
Frequently asked questions
Questions about frequency transmission
How do I send a frequency from SkyDemon to the radio?
You tap the frequency in the app, it's transmitted via Bluetooth to the SD-Link adapter, and the adapter sets it on the radio – without any manual input. The adapter is plugged in between the radio and the wiring harness.
Which navigation apps support frequency transmission?
SkyDemon, Sky-Map, VFRnav and EasyVFR are supported; XCSoar is supported with the adapters for ATR833 and KRT2. Air Navigation Pro is under development ForeFlight, Garmin Pilot and SDVFR are not currently supported.
Do I need to solder for installation?
No. The SD-Link adapter is plugged in between the radio and the wiring harness (plug-and-play), and operates on a 5–28 V supply. Angled versions are available for tight installations behind the radio.
Will this work with my radio?
SD-Link supports, among others, the Funke ATR833, TQ KRT2, TRIG TY91/TY92/TY96/TY97, Becker AR620X (NG), uAvionix AV-30, and Dynon SV-COM. You can find the complete overview on the compatibility page; the adapter finder will guide you to the right version in three steps.
Does the connection work in both directions?
Yes, for many radios: Active and standby frequencies are kept synchronized, so a change on the device is also reflected in the app. The exact scope depends on the radio and its protocol.
Find the right adapter
Describe your avionics in the adapter finder – we will show you the appropriate SD-Link variant.