Discussions

APM board v1.0 versus v1.4 - with arducopter 2 code

Posted by afernan on July 5, 2011 at 1:10am

I want to start this discussion in order to isolate differences with code AC2 when runing in APM V1 or V1.4. I have both boards and I´m testing in the same frame. I´ll report here the details of my tests

APM V1

AC2 2.0.29

problems with baro: alt-hold doesn´t work; the copter goes up without end.
Loiter is not good: it moves around loiter point amplified and diverging
Loiter PID = (0.5, 0.1, 0.02) the behaviour is aceptable
X-bee doest not work fine. After some minutes both x-bee boards "briks". Then a hard work to "unbrick" them (but possible)

APM V1.4

AC2 2.0.33

problems with baro solved.
Loiter still not good (default settings)
X-Bee works fine.

more testing comming.

Regards

Angel

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Replies

Vishal July 8, 2011 at 2:12pm

Not sure if this has to do with the difference between APM v1 and v1.4 but here is the problem I'm currently having-

http://diydrones.com/forum/topics/error-uploading-via-arduino
afernan July 8, 2011 at 11:40am

With AC2 2.0.33 X-Bee works in APM Planne (v1.0.30) only for non-CLI connections.

"Terminal" doesn´t work ("chinese" letters appears) . I´ve checked with both APM v1.0 and v1.4, and fails with both.

Sonar looks to be better with v1.4 than v1.0. It looks more progresive (less small "jumps") with v1.4. Also, I have the sensation of better and more effitient flight (more controlled) with v1.4

I´m using now this medium size Quad: (650g with 2.2 batery). I used PID = (0.45, 0.025, 0.09) por stable mode.

I need to change sonar control PID´s. Are the ones called "Sonar Thottle PID´s"?. I don´t think so, because I don´t see changes in sonar control when changed them.

.
CyberCrash July 6, 2011 at 11:42pm

So Angel,

what did you find out?

APM v1 vs. APM v1.4 with same firmware?
pizcolq July 5, 2011 at 3:19am

Great idea Angel, I have AMP 1.0 and would like to know the real differences. By the way, I think the firmaware is just the code you upload to the AMP.
CyberCrash July 5, 2011 at 1:33am

Comparing the two available APM boards for different behaviour is a great idea.

But then you shouldn't try different firmware versions. This defeats the purpose. I got the v1.0 APM. So I am very, very interested in a compare with identical firmware versions to find out if they are responsible for my bad copter behaviour.
Niklas Goddemeier July 5, 2011 at 1:31am

Hi Angel,

in order to find differences in APM V1 and V1.4 you should have the same firmware Version running on both devices. It is very likely that the problems you have identified on V1 will be gone once you updated to 2.0.33.