Description
Funke ATR833 Bluetooth adapter (Dual Source) for SkyDemon, Sky-Map and other navigation apps — SD-ATR833-DS.
Control your radio via the app — without additional wiring, now also compatible with existing EFIS installations. The SD-ATR833-DS is a plug-and-play adapter for the funke ATR833 VHF transceiver. It simply connects between the radio and the Sub-D connector — no soldering, screws, or configuration required. Set the standby or active frequency directly from SkyDemon, Sky-Map, VFRnav, or XCSoar via Bluetooth. The adapter is 5 mm shorter than the standard version and fits inside a C42.
Dual Source — compatible with existing EFIS
Many modern aircraft use an existing data connection between the EFIS (e.g., Dynon SkyView, Nesis) and the radio—classic Bluetooth solutions reach their limits here. With dual-source technology, you simply disconnect the existing data line, plug in the adapter—and you're done. Your EFIS connection remains intact, and you gain SkyDemon integration.
Key Features
- Compatibility: Designed for the Funke ATR833. Compatible with ATR833-S, ATR833-A, and ATR833-II-OLED, running on Android and iOS. Usable only with radios running software version SW 5.8 or higher—older versions (SW 5.7 and lower) are not supported. You can check if your device has SW 5.8 by looking at the serial number: the first supported unit has serial number 40131610 (production year 2010). Tip: The last two digits of the serial number indicate the production year—devices with lower numbers may require a software update from the manufacturer.
- Simple installation: Tool-free adapter plug; secure hold thanks to the Molex latch system.
- Power supply: Directly connected to the avionics bus (12–28 V), no additional power supply required. An integrated fuse protects against malfunctions—the radio remains operational.
- Connection: RS-232 (V.24 level), dual-source capable.
- Bluetooth: Low Energy (BLE), for Android and iOS.
- Compact design: Dimensions 59 × 45 × 16,5 mm, Weight 50 gr.
Important note: This product is intended for experimental purposes only.








Helge B. –
Works perfectly! After the first flight, I selected and transferred the frequency directly on the iPad – simply amazing. No more messing around, no more transmitting on the wrong frequency. It's so much better this way.
Verified purchase.
Markus K. –
Perfect, thank you very much! We use this for ATR833 and G3X.
Verified purchase.