# Support for serial inputs

**URL:** <https://forum.vfrnav.com/t/unterstutzung-von-seriellen-eingangen/234>\
**Category:** VFRnav Support\
**Created:** [March 4, 2026, 7:16am UTC](https://forum.vfrnav.com/t/unterstutzung-von-seriellen-eingangen/234 "2026-03-04T07:16:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![phifra](https://forum.vfrnav.com/user_avatar/forum.vfrnav.com/phifra/32/386_2.png) [@phifra](https://forum.vfrnav.com/u/phifra)\
**Post date:** [March 4, 2026, 7:16am UTC](https://forum.vfrnav.com/t/unterstutzung-von-seriellen-eingangen/234/1 "2026-03-04T07:16:18Z")

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Hi,

You can already connect FLARM and radios to VFRnav via a Bluetooth interface. Some devices additionally support serial RS232 interfaces, e.g. the SteFly Nav.

> **[SteFly Nav 57 & 70 - SteFly](https://www.stefly.aero/product/stefly_nav_57_70/)**
>
> Lieferumfang: SteFly Nav-Gerät, fertig montiert RJ45-Kabel D-SUB 15-Stecker zum Löten mit Quick Lock Verriegelungssystem (der Open-Vario Stecker / Kabelbaum ist kompatibel)

Via these interfaces it is possible, for example, to receive traffic data directly via cable from a FLARM as NMEA data and to control the radio directly without a Bluetooth adapter.

Currently, in VFRnav only Bluetooth and network can be selected as interfaces. It would be a great upgrade if the serial interfaces could also be used.

Best regards,  
Philip

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**Author:** ![H655](https://forum.vfrnav.com/user_avatar/forum.vfrnav.com/h655/32/350_2.png) [@H655](https://forum.vfrnav.com/u/H655)\
**Post date:** [September 19, 2026, 2:31pm UTC](https://forum.vfrnav.com/t/unterstutzung-von-seriellen-eingangen/234/21 "2026-09-19T14:31:57Z")

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Hello Philip,

I want to give one last try with the upcoming update 💪

**Technical background:**  
My suspicion is that the superuser version of the Android system on your device differs from the one on my test device back then. On other Android devices with a serial interface — for example the Naviter Oudie N — we were also able to successfully test the connection.

With the upcoming update we will therefore include a change that also supports older superuser versions.

So we’ll see whether the serial connection works on your SteFly with a version \>4.30.3.

If not, the last option will probably be a flight to EDWQ 👋

Clear skies  
Hermann

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**Author:** ![phifra](https://forum.vfrnav.com/user_avatar/forum.vfrnav.com/phifra/32/386_2.png) [@phifra](https://forum.vfrnav.com/u/phifra)\
**Post date:** [September 19, 2026, 4:21pm UTC](https://forum.vfrnav.com/t/unterstutzung-von-seriellen-eingangen/234/22 "2026-09-19T16:21:30Z")

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I’m excited! Thanks 👍🏻

Otherwise we’d be happy to come by sometime. It’s not too far away 😉