Replies: 4 comments
-
You will probably have to ask the OGN guys about this one. We are just using the esp32-ogn-tracker firmware without any modifications.
In theory: probably yes. In practice: don't know how well it would work. I had this idea before. The common mlat-client software however, does not allow changing receiver location dynamically - it needs to be stationary. It might be possible to change that. However, it also requires a low latency internet connection, which is usually not available to the Stratux anyway, so the use is quite limited anyway. If you believe in it, feel free to code a prove of concept though.
There is no documented way to do this. Is it possible to create hardware like that? sure. Is there a ready-to-use solution? I don't know.
Stratux already does this to extrapolate traffic position in case it's not received for a couple of seconds. Voice warnings are usually produced by your EFB app, not by the Stratux. So they would have to do that. Or are you talking about the builtin radar web page? Then sure that's possible - you just need to code it and create a pull request.
My answers might seem a bit harsh. But the reality is, that I'm doing this in my free time and do not receive any pay for it (except for occasional small tips). So if I do something, then because I want it, not because somebody else wants it. I'm always open to contributions though. |
Beta Was this translation helpful? Give feedback.
-
|
To run 2 T-Beams with one antenna - or to use one antenna to receive (RX) and transmit (TX) at same time, you have to use a "diplexer" or "Wilkinson combiner/splitter". between e.g. T-Beam (TX) and NooElec SDRs (RX). The 3dB loss could be acceptable and the ESP32 would be reasonably decoupled. search for "RF Power Divider" or "RF Power Combiner". e.g. the manufacturer of those "combiners" is the company "Mini-Circuits". Please note that these components are frequency-selective, i.e. you have to select them for the respective frequency range, in this case the 800 MHz range. It is also important to pay attention to the so-called isolation so that the other TX is not operated inversely. This could be one RF switch - you have to select the correct model |
Beta Was this translation helpful? Give feedback.
-
|
Thank you both for your prompt and comprehensive replies. If I´d be a programmer I would happily give 2.) and 4.) a try, yet I am not. Your answers are not harsh b3nn0. You just make it quite clear that you put a lot of effort into it without renumeration which is very much appreciated. @alexanderdross: You mentioned the RF switch on ebay. Which one out of the three options would you recommend for this setup? |
Beta Was this translation helpful? Give feedback.
-
|
Regarding 3) |
Beta Was this translation helpful? Give feedback.
-
1.) As Stratux EU does already send the PAW protocol to PAW ground stations and other Stratux, it would be awesome if any Stratux in the air would act as a PAW groundstation itself (Atom in the air). Therewith relaying it´s own information to concerned aircraft in range / line of sight. Rosetta is now longely awaited able to do so (SkyGrid). This is the first time Stratux does have a major disadvantage compared to Rosetta.
2.) Would´t it be possible to utilize each Stratux in the air for doing MLAT? They all have a precise GPS timestamp and might well be in the appropriate distance for reliable results.
3.) Just curious if it would be possible to share a single 868 MHz antenna for both the SDR Flarm receiver and the T-Beam by switching the connection every second? So anytime either SDR or T-Beam would be connected without db loss. This would make the installation easier.
4.) Flarm does a mutual course prediction. Is it possible to integrate such an algorithm yielding lesser aural traffic warnings?
Thanks for any comments including calling me a technical rookie...
Beta Was this translation helpful? Give feedback.
All reactions