Bluetooth adapter

SD-Link Bluetooth adapter for universal / RS-232

SD-Link Universal Adapter – the compact Bluetooth-to-RS232 adapter (BLE 5.0) for hobbyists and specialized setups. Seamlessly connect supported RS-232 avionics to compatible navigation apps such as SkyDemon, Sky-Map, VFRnav, EasyVFR, and XCSoar.

For EFIS integration

SD-Link Universal Dual Source

Universal Bluetooth adapter (BLE 5.0, dual source, Bluetooth-to-RS232) for supported RS-232 devices — transmits frequencies from SkyDemon and Sky-Map, even with EFIS present. Compact fixed installation, 5–28 V, some technical skill required. For experimental use only.

SD-Link Universal Dual Source

139,00 €

Including VAT, plus shipping costs. Delivery time: Standard shipping (1–5 business days)

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Frequently asked questions

Where can I find the installation instructions and the manual for the SD-Link adapter (Universal / RS-232)?

The manual page " Installation instructions for Universal / RS-232" bundles all instructions for the appropriate adapter variants – per navigation app, in up to 14 languages – including the entry you select in the app and the most common pitfalls.

All installation and setup instructions as well as data sheets can be found bundled on the Instructions & Downloads page – matching the radio and navigation app, as PDFs for download.

Which apps are the adapters compatible with?

The SD-Link adapters are tested and compatible with the following navigation apps:

SkyDemon
Sky-Map
VFRnav
EasyVFR
XCSoar

We'll explain step by step how to send frequencies from the app to the radio .

Tip: In SkyDemon for TY91/TY92, select the device type “Garmin GTR225 Compatible”.

Do you also support other radio devices?

Yes, in addition to the SD-Link Universal Adapter, there are SD-Link adapters for other devices:

Note: The Becker AR6201 is supported from serial number 3001 (NG version) onwards — older AR6201 models are not. The AR6211 (successor to the AR6201) is supported without serial number restrictions.

The model-specific, automatically updated list – including devices that are not compatible – can be found under Supported Devices.

Why is a ground wire mandatory in RS-232 wiring?

RS-232 requires a common ground between the radio and the adapter, in addition to RX and TX. Without it, the adapter appears to connect but delivers no data or only sporadic data – the most common wiring error in universal installations.

Always connect the ground connection before troubleshooting.

Am I allowed to use the adapter on my airplane?

The plug-and-play adapters are simply inserted, not permanently installed – no modifications to the aircraft's wiring are required, and they can be removed at any time without leaving any residue. This is straightforward for ultralight and experimental aircraft.

The factual classification – also for certified aircraft (E-class) – can be found on the page Bluetooth adapters in airplanes: what is allowed?

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