I tried following today on 2.0.49 firmware with APM Planner 1.0.86. As you can see from the video, there was obvious lag in the command around 1/2 seconds. The other thing the quad was doing it was not coming to stabilize position when I centered the joystick. This is because of the uneven cushion I placed above table. The settings are

Joystick: Saitek Cyborg

Telemetry: 900Mhz xbees @ 57600bps link speed

frame gaui 500X


Joystick is pretty slow to respond. When I checked in windows game controller I found out that in game controller calibration looking at the raw data the joystick response is slow. So its a windows + PC issue

Views: 9034

Comment by SonicPet07 on November 19, 2011 at 11:58am

Did you do all the setup with the joystick or RC like they tell you too?  Can you do it somehow without the RC? I'm trying to make mine use the Joystick for control, and/or autonomous in general but I can't get past the setup.

Comment by Farooq Niaz on November 19, 2011 at 12:13pm

After this video I did three more flights which proved more successful. Actually I did not have the RC transmitter with me at the timest was doing these testing. It is with my friend so I went without it. Everything is same like. By the way if you are using joystick the RC transmitter becomes disabled. Arming disarming is done from joystick.

Comment by Ellison Chan on November 19, 2011 at 12:22pm

Yes, I tried it with my APC220 too, and I notice the lag too.

If you connect to the USB, then the lag goes away.  I suspect that its due to my APC having a air rate of 19200bps.  But your Xbee is at 56K, and you're still getting lag.  I wonder if 115K Xbee is fast enough.

Comment by Farooq Niaz on November 19, 2011 at 12:28pm

I shall check it tomorrow on 115200 but after doing tests in open. However as I said when I tested the joystick in control panel in game controller I could visibly see the lag. So its a windows lag or at least one reason is its because of the windows

Comment by SonicPet07 on November 19, 2011 at 12:31pm

On the fact that it may be a Windows Lag. I wonder if there is a process or something in the background thats slowing it. That's a size-able slow down and it doesn't seem like it should be that slow just because of Windows.

Comment by Ellison Chan on November 19, 2011 at 12:31pm

It can't be the joystick causing lag.  With that kind of lag, it would be impossible to play games.

Comment by Farooq Niaz on November 19, 2011 at 12:37pm

No actually in flights later on I realized its not 1/2 second. Actually its night here and I was testing in my  room. Tomorrow I shall test it in open then I shall be able to confirm that if it flyable with joystick with an acceptable lag or not

Comment by Ellison Chan on November 19, 2011 at 1:05pm

You should just take the props off, it's a lot safer.  I did my testing without props, and saw the motor lag, and decided not to pursue it due to the latency issues.

Comment by Michael Pursifull on November 19, 2011 at 4:53pm

You are unlikely to see any benefit by changing the Xbee data rates to 115k, because the radio link is just beyond 56k. In fact, you are likely to see poorer performance due to buffer problems and retransmits. 

Comment by Ellison Chan on November 19, 2011 at 4:59pm

So, basically this feature is not yet possible with any existing wireless system, Mike?


You need to be a member of DIY Drones to add comments!

Join DIY Drones


Season Two of the Trust Time Trial (T3) Contest 
A list of all T3 contests is here. The current round, the Vertical Horizontal one, is here

© 2019   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service