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HomeHomeDiscussionsDiscussionsiFly General Di...iFly General Di...Raspberry Pi ADSB-INRaspberry Pi ADSB-IN
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10/13/2015 6:45 PM
 

Has anyone gottten the AHRS to work with iFly? I've wired the GPS/AHRS chip to the GPIO and get a solid 12 sats, but the AI behaves as if there's no AHRS source, even though the Stratux webpage shows a green checkmark for AHRS.


Jeff Nokomis Clark, Mooney M20G, iFly app on ASUS ZenPad Z8s, ASUS ZenFone AR, ASUS Windows 10 tablet, Stratux ADS-B w AHRS
 
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10/13/2015 8:54 PM
 

I understand that the AHRS is still under development. It does not work at all in Wing-X but works better in Foreflight but still ready. Everything else seems to work fine. Some builders have reported beliefs that vibration in the cockpit combined with sensitivity of the AHRS may be an issue. I am building some now and intend to use rubber washers to help insulate the GPS chip from vibration and wait for the developers to resolve the other issues.

 
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10/21/2015 6:44 PM
 

hi all

my name is dan and am new to this form. i have a nexus 7 and have been trying to use the raspbery will little sucess. it will connect to the android tablet but not seeing traffic. i'm up at about 3000ft, see the tower about 7 miles away but not the traffic. am i doing something wrong?

thanks

dan carley

 
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10/21/2015 8:16 PM
 

Do you have one radio, or two? Are you receiving weather ok? Traffic can be non-existent in the ADS-B system, even when it's on radar and right outside your window. You will only RELIABLY see aircraft that are transmitting ADS-B Out. Other traffic, even when known and radar identified by ATC, will usually not show up (at least until full implementation in 2020). I often fly in busy airspace and the only thing that shows up is an occasional airliner at 30,000ft. Other times, the screen is full of targets. Also, iFly has settings that greatly reduce the traffic you can see. For now, set it to show everything until you re satisfied you're getting traffic, then limit it as needed. On my last flight, I was given traffic at 5 miles and 500ft above me. Nothing showed up on my Stratux or SkyRadar. I eventually spotted the traffic on a converging path, and it passed over me close enough to read FORESTRY on its wing. So if weather is working, you've probably done everything correctly. If not, make sure you have the latest release. Then check that proper options are checked in the Stratux web page. Then make sure the antennas are well connected and can see the ground. Then make sure the WiFi is not dropping out. Finally, if the red light on the Pi ever blinks, it isn't getting enough power and will not behave as expected. Good luck! A new version came out yesterday that solved my intermittent drops.


Jeff Nokomis Clark, Mooney M20G, iFly app on ASUS ZenPad Z8s, ASUS ZenFone AR, ASUS Windows 10 tablet, Stratux ADS-B w AHRS
 
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10/21/2015 10:37 PM
 

ADS-B in without ADS-B out is almost useless for traffic. It is good for Nexrad radar if you remember the radar images you are seeing could be as much as 20 minutes old. It is also good for receiving metars.

ADS-B traffic is received two ways. With ADS-B in, you can receive any traffic in the vicinity that has ADS-B out and is transmitting on your frequency, either 978 or 1090. Generally, 1090 is for aircraft that fly above 18,000 feet and 978 is for aircraft flying below 18,000 feet.

All radar traffic with mode C or certified ADS-B out is transmitted via the FAA ground stations. However, to receive this ground station signal, you must have ADS-B out to trigger the ground station. If you don't have ADS-B out, you may sometimes be able to intercept a signal being transmitted to another aircraft in close proximity that does have ADS-B out.

 
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