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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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