JR 28X

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JR 28X

Postby Dave Wilshere on Thu Mar 19, 2015 11:27 pm

Its time to start a thread...it's gonna be a busy one with questions questions questions!
I think I'm able to fly a simple model straight off...that's about it ;)
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Re: JR 28X

Postby Dave Wilshere on Tue Mar 24, 2015 3:17 pm

Checking out HA from the 28X!
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Re: JR 28X

Postby WalkAbout on Tue Mar 24, 2015 10:56 pm

Good thread and i shall mirror this in the MacGreggor section.

So far I've managed switch assignment, basic flight mode switching, Gyro setup. However i haven't got into the trim system as of yet where you can assign everything other than your best friends wife as a trim :lol:

Going to do some videos of basics I've learned over a 10 hour period of setting up the J10 jet.. So far I'm purely using the Xbus sytem which is a mind melt until you understand a few basic principles . IE 1 wire out of the RX will control oodles of servos :o It does this by taking a new approach to how the RX communicates with the servos and most important of all is how the Servos listen to the RX or RXs .
Basically the RX through 1 outlet communicates all signals all the time to all servos. The difference here from our old technology is is that when you receive an X Bus Servo it is factory set to thinking it is a THROTTLE Servo ( chanel 1 or ID 1 ) this being JR. You can then re assign the servo ID or identification to whatever you want depending on the amount of channels you have. Once this is set you this servo will only listen to its signal and will disregard all other communication from the RX. Each of these Main ID channels then has sub channels .So for example you can have a left and right Aileron channel that has 4 servos so there would be 4 Sub ID channels that can be used to reprogram each of the 8 servos. Sub ID 1,2,3,4 per main ID channel, these servos can be individually set for Centre and End Points as well as speed etc. BUT THE IMPORTANT THING TO REMEMBER IS THAT ONCE A SERVO IS PROGRAMMED IT ONLY LISTENS TO ITS SIGNAL AMONGST ALL THE REST BEING BROARDCAST...

Again and this is also very important. IF YOU PLAY ABOUT ON THE TX WHEN YOU GET THIS SYSTEM AND CHANGE YOUR FACTORY DEFAULT ID SETTING OF ANY NEW JR XBUS PRODUCT (FACTORY DEFAULT SETTING BEING MAIN ID 1 SUB ID BEING 01) YOU MUST MAKE A NOTE OF WHAT YOU HAVE CHANGED THE ID TO FOR EXAMPLE ID 3 sub ID 03 and JR Provide little stickers you can put on the servo otherwise you may get confused as i did :lol:
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Re: JR 28X

Postby P.K. on Wed Mar 25, 2015 6:44 am

Dave Wilshere wrote:Checking out HA from the 28X!


Amazing - must be the first TX you can surf for porn !
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Re: JR 28X

Postby Dave Wilshere on Wed Mar 25, 2015 8:04 am

Don't worry, Birdie is in America till next week, so his will be corrupt with all sorts of interesting things ;)
Beardy wants to get Mike Strutter doing my voice announcements...!
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Re: JR 28X

Postby Dave Wilshere on Wed Mar 25, 2015 8:11 am

Paul Baker did this video for an American...
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https://www.youtube.com/watch?v=sPapj19l_Yo
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Re: JR 28X

Postby Arun on Wed Mar 25, 2015 9:32 am

Dave Wilshere wrote:Checking out HA from the 28X!


Having a radio with a link to the Internet opens the interesting possibility of getting your radio hacked. Does it automatically turn off the WiFi link while the Tx is transmitting? Otherwise imagine you're connected to the WiFi at PMFC whilst flying and some Russian hacker takes over your machine...
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Re: JR 28X

Postby Andrew Bird on Wed Mar 25, 2015 9:44 am

Dave Wilshere wrote:Don't worry, Birdie is in America till next week, so his will be corrupt with all sorts of interesting things ;)
Beardy wants to get Mike Strutter doing my voice announcements...!


If I come back and find mine talks like Mike Strutter I would actually be rather impressed!
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Re: JR 28X

Postby steverobertsuk on Wed Mar 25, 2015 10:06 am

Arun wrote:
Dave Wilshere wrote:Checking out HA from the 28X!


Having a radio with a link to the Internet opens the interesting possibility of getting your radio hacked. Does it automatically turn off the WiFi link while the Tx is transmitting? Otherwise imagine you're connected to the WiFi at PMFC whilst flying and some Russian hacker takes over your machine...


I have asked JR about this and no- there is no way of the radio being 100% secure, just like any other device. But the radio only uses the android interface for programming, so once the settings are set, the radio uses a difference computer and interface to transmit so if the android part does go down when your flying you will still be able to fly and land safely.
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Re: JR 28X

Postby Arun on Wed Mar 25, 2015 10:15 am

steverobertsuk wrote:
Arun wrote:
Dave Wilshere wrote:Checking out HA from the 28X!


Having a radio with a link to the Internet opens the interesting possibility of getting your radio hacked. Does it automatically turn off the WiFi link while the Tx is transmitting? Otherwise imagine you're connected to the WiFi at PMFC whilst flying and some Russian hacker takes over your machine...


I have asked JR about this and no- there is no way of the radio being 100% secure, just like any other device. But the radio only uses the android interface for programming, so once the settings are set, the radio uses a difference computer and interface to transmit so if the android part does go down when your flying you will still be able to fly and land safely.


Good info Steve, as you say it can't be 100% secure (the two computers must share some common memory in order for the Android/programming part to make the settings available at transmit time). However there are lots of ways this split computer design could be made secure enough for this purpose. Thanks.
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