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E4000 and R820T will not work for this, you'll get spotty results. |
Hi "okie". I'm not sure who/where you are or your background. You're profile is blank. You only appear to be associated with this thread.
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I hope I was clear to others in saying the E4000 has its uses in the lower frequencies (such as APRS), the R820T units are prolific (so many may have one lying around), and this project seems to benefit from the newer R820T2 devices. I was trying to give some data to those who might be experimenting and to help with choosing the better component hardware. The reddit user has given links to Amazon for the RPi bundle and others pieces (and may be making money from every purchase). Some of us may already have pieces and are experimenting with what we have. As I identify differences I'm trying to share to help others. We are here to learn and share. BTW: for anyone trying to use one of the RT5370 based wifi dongles (common with the canbit bundles and used by many vendors) I have built the latest stable code for hostapd with the necessary support. I'm happy to post them somewhere if you're not comfortable doing raspberry Pi builds. |
R820T
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-Greg |
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I also tried an SDR-RTL based on the R820T. My results were not as good as my permanent mounted GDL-39. This may be attributed to the superior installation and antenna of my GDL-39 or something else. I like this experiment so I'll try the different dongle and share what I learn. |
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Well, at least with 1090MHz ADS-B, it has been tested ad nauseum and R820T2 always comes out the winner. If you were using either an E4000 or R820T RTL-SDR, that is likely the cause of bad "reception" as the qualities of these are inferior for this application. Quote:
If you're against him making money off of the links, just type in the name of the product on Amazon. They're not custom made for Stratux :) |
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Most pilots testing Stratux in this thread are focused on the weather data which is on 978Mhz. At least one poster has had good results with the R820T. I had marginal results. If someone has a RPi2 and the older R820T, they can get the Stratux to work. If they are buying everything new, it's beneficial to get the R820T2. |
I am buying everything new (except for the Kmashi, which I have), especially after reading from the Reddit OP, "Yeah, a unit that has a good GPS, pressure sensor, and the AHRS sensors is coming for development. It'll add another ~$50 to the parts list." REALLY glad I did not buy something retail recently, as I intended to do.
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Why not....
implement the required pi software routines as an app for android and/or ios?
Sorry for my flagrant display of ignorance; the last real programming I did was back in the mid '70s (previous century). But if the SDR uses a USB port to communicate, why couldn't the routines running on the pi be run inside android, and avoid the extra hardware? Is it just too much overhead for one device to handle ADSB tasks in addition to mapping? Charlie |
Hi Charlie.
No worries on "the learning curve". We can dismiss building it with iOS since there is no direct way to get to the necessary internal protocols and no access to the SDR via USB. That leaves Android. ForeFlight does not run on Android. |
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Dave |
Dave,
Very cool! The few attempts I've made to hook devices up over OTG cables have been hit or miss. I've gone back and edit my original comment. Thanks for syncing up our thread! |
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Does your answer mean that it *is* (or might be) possible for the stuff running on the pi to get ported to an android device (the same one running Avare or other mapping app), instead? And I don't really consider this a 'learning curve' any more. The last time I programmed, 'Basic' meant Basic Assembler Language (BAL). At this point, the gap is far to wide. I'm just grateful that you and other users of various technologies have discovered 'open source' and its variations. I'll try to take advantage your knowledge on this, and hope to pass on my knowledge of some other field. Charlie |
Hi Charlie,
I've put my foot in my mouth so many times on this read I may as well skip dinner! So I'll attempt to just answer you question and not go off the rails. Is it "possible" to port the project to Android and connect it with one of the Android based aviation navigators? yes. Is it easy? no. Is it likely? no. |
Well shucks. Guess I'll have to spend the extra 50 bucks to save the 800 or so vs ADSB...
:-) |
I am lost.
With all the back and forth, what do I need to buy to make this work. I am interested since at this time, I can not buy a $800 Stratus and this would be great for foreflight. I have looked at Amazon and it looks at though the grouping everything for $100. After reading, I am confused if there are other items to buy to make it work better.
Thanks, |
The reddit list looks complete for the Stratux for "weather only". You will use the battery USB cable to charge and then switch it around to also to power the RPi.
There is a follow on project underway to add GPS support and to support simultaneous weather and traffic. Nothing you buy now becomes obsolete. You will also need to have or borrow an SD card reader. You computer may have an SD slot or you may have a USB card reader that an supports SD card. If neither, then the "thing" you are looking for is something like this: http://amzn.to/1U3d7Po If you get all the pieces and get stuck, I'm happy to get on the phone (or Skype) to walk through the process. |
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I was connected via bluetooth to a GDL-39 for my GPS position source but Foreflight was showing Free Flight via the Stratux for the ADS-B. As I understand it the GDL-39 will not send ADS-B data to Foreflight at this point. |
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The current version has full TIS-B traffic and FIS-B weather, the recommended hardware is: http://amzn.com/B00MV6TAJI http://amzn.com/B00P2UOU72 http://amzn.com/B00JM59JPG Then follow https://www.reddit.com/r/flying/comm...ght_or_pretty/ Most people report it takes about 10-15 minutes. |
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The reddit thread has a few comments trying to clarify what is available with the Stratux. Quote:
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Traffic
To see all of the traffic, you'll need to be transmitting ADS-B out. You can configure your ADS-B out transmitter to specify which frequency your portable receiver is on. Properly configured, with good ground station coverage, you should see all traffic with either a 1090 or 978 receiver.
If you are relying on other people to wake up the ground stations, a dual band receiver would be beneficial, but there is no guarantee that you are seeing all transponder equipped aircraft unless you are transmitting out, and have good ground station/radar coverage. Paige |
Paige is correct. I would add that 1090 traffic could also be seen via ADS-R if another aircraft near you wakes up the ground station for traffic.
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I have placed my order
I have placed my order and hope to have all the pieces in a few days. If I get all the pieces and get it working, I have a trip planned to Atlanta Area during the Labor Day weekend and hope to test it out on a long cross county from the Orlando area. I will keep my fingers crossed.
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iFly 740
I have successfully displayed traffic and weather on my iFly 740 using this Stratux setup.
In the ifly menu for connected devices, select "FreeFlight", and it appears to work. Very happy on the first trial, but lots to learn yet. |
Will this work with wingx???
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I only use WingX and am building one. |
Seems like it'd be really easy to take this and have it output on RS232 via the USB ports (USB to RS232 adapter cable). Once you do that, you can pipe it to any of your avionics.
I haven't looked at the RS232 spec for traffic or weather to something like a Garmin or GRT, but I believe it's an industry standard. Anyone know where to get documentation on that spec? |
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USB or RS-232. The issue with GRT via USB is what chipset is used. I know they are compatible with more than one but not sure if all. Connecting via RS-232 should not be a problem. If the output format is the same as DUAL, iLevil, FDS and SkyRadar, then I suspect the GRT systems will be fine as I have tested all of those. James |
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This is all well and good, but how do you go from a usb output on the Raspberry PI, that thinks it's communicating with a WiFi dongle and strip out the data string to feed into the RS232? I'm not a computer guy at anywhere near that level, and there's a lot of missing links here to me. |
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I missed that part of the dialog. "My Bad". Was thinking there was a serial stream out the USB port. James |
The communication mechanism - USB, wifi, Bluetooth, serial, light signals, semaphores, or smoke signals - isn't the real challenge. Internal to the code, it's just strings of numbers and characters. These strings can be transmitted on any of the methods with relative easy.
The challenge is knowing what format the vendor is expecting. It's a bit like communicating in another language. If you are speaking French and the other person only understands Chinese, not much useful gets conveyed. The contributors to this project are using a combination of published documents and packet sniffers to figure out what is expected. For some of the target vendors, they don't publish anything, so it's a lot of difficult reverse engineering. For some vendors, there is no available Rosetta Stone. I know there is a desire to mimic other ADSB receivers but the contributors to the project don't own the necessary original manufacturer hardware to aid with the analysis to black box engineer the packets and messages. If someone wishes to donate hardware, I'm sure it would help. |
Question
I am waiting for my items to come in the mail but looking over the site I see three down loads. Which one do I download due to there are two updates as well as the original. Any help would be great and hope the itmes come in soon.
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Hi Charles, v0.1r3 is the best so far. However, like much of our latest avionics, you should keep an eye for updated builds. I am aware of a number of bug fixes and features that have not yet been rolled up into a new build.
UPDATE: a newer "release" is now there. Rather than keep editing this post, I advise taking the newest build. If you have any issues then back off the the newest "release". |
Stratux is getting better
For those who are interested, there is a now a subgroup over on reddit dedicated to the Stratux project.
A few highlights to pique your interest ...
It's been tested with the following functionality:
Follow the progress on reddit: https://www.reddit.com/r/stratux Watch for new builds on GitHub: https://github.com/cyoung/stratux/releases |
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I tried it out!
So I couldn't resist and had to order it up. I have an RV-6 with a Dynon Skyview system in it. I have ADS-B out and a Dynon ADS-B receiver that I spent $900 on, I think. I also have an Ipad in the plane running ForeFlight. So I got the parts, assembled it, and had it up and running in about 15 minutes. I opened up foreflght on my Ipad and found the stratux device right away. I couldn't wait to try it out in the air. I went flying today and was amazed. The thing got weather and traffic exactly like the Dynon Skyview. The ipad actually displays traffic a little nicer I think than the Dynon does. There wasn't much weather around but what little there was matched on both screens. The only thing I noticed was on the return flight The traffic was not showing altitudes? On the first flight from Long Island to Connecticut I saw all traffic the same as the Dynon did, showing altitude in relation to me. On the return flight all the traffic had zeros instead of the altitude in relation to me? Weird, I flew again and still zeros. Have to figure that one out, but so far the stratux amazed me.
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Hi Richard, thanks forcthexPIRE.
The "zeros" is a bug. You can read a similar report and reply on reddit - https://www.reddit.com/r/stratux/com...ralink/cuk5pvr |
Help!!!!!
I have gotten my parts and tried to do the intructions on how to load the software onto the disk. But for some reason I am having dificuties. I am not sure if it is me or my laptop software (older laptop) but can someone help. Is there anyone that can help me tomorrow monrning sometime with the installed the software portion. Please PM me you info please.
Thanks |
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