Re: [Paparazzi-devel] ardrone2_raw starts but doesn't fly

[Ben Laurie]

Well, I've had some fun.

Firstly: Flight Recorder - I have no idea what's going on with that -
but broadly, paparazzi doesn't seem to get positioning from it
anymore, sirf demo appears not to want to talk to it and if I try to
cat its USB port, I get one block of data and that's it.

Secondly: u-blox. I have a device that claims to be a u-blox 6, but it
stays in NMEA mode, despite ap trying to reconfigure it. u-center also
seems unable to do things it ought to be able to do, like get a log
from it or save its configuration. This is a cheap one from China - I
have a more expensive one from Germany on order :-)

Thirdly: I had to change the device from /dev/ttyUSB0 to /dev/ttyACM0
- the ardrone doesn't seem to create a USB0 node. BTW, I'm mildly
confident the baud rate setting is irrelevant for USB devices - any
comment?

Finally: so I configured things for NMEA instead of u-blox. This
actually works, in the sense that I get a fix, and its in the right
place and height. And it does actually take off this time. However, I
have a similar experience to before: it zooms off at high speed,
overshoots, turns around and eventually falls out of the sky (or in
one case, hit a tree). Could this be because it doesn't get an updated
position frequently enough?

At least these things appear to be quite robust!

Any suggestions on why the u-blox doesn't work? If I wanted to
manually configure it, that should be possible from u-center, right?


On 5 October 2013 15:04, Ben Laurie <address@hidden> wrote:
> On 5 October 2013 14:42, Freek van Tienen <address@hidden> wrote:
>> You should check the hight of the waypoints compared to the current hight.
>> What I could think of is that it didn't do a good "Geo init" and doesn't
>> have the correct height.
>> The other thing I could think of is that if you have a joystick connected
>> you should set it into NAV(AUTO2) mode, and give no thrust at the Start
>> engine block(else it can't start the propellors) and give full thrust after
>> the propellors are turning before entering the Takeoff block.
>>
>> 1. The Geo init block: This one updates the waypoints positions and height
>> of the drone in respect to the current GPS position.
>> 2. The Start engine block: This block starts the propellors at the lowest
>> speed, so they should be turning but it should not take off.
>> 3. The Takeoff block: This block let the drone takeoff and go to the next
>> block in the flight plan. So then it should really go to STANBY for example.
>> (Keep in mind that if you have a joystick connected you must give full
>> thrust, because the thrust of your joystick is the limit of thrust the drone
>> can give)
>
> I don't have a joystick connected - do I need to change anything to
> compensate for that?
>
>>
>>
>> 2013/10/4 Ben Laurie <address@hidden>
>>>
>>> Any hints on how to debug this? For a change, my weekend is clear!
>>>
>>>
>>> On 1 October 2013 11:50, Ben Laurie <address@hidden> wrote:
>>>>
>>>>
>>>>
>>>>
>>>> On 1 October 2013 11:38, Christophe De Wagter <address@hidden> wrote:
>>>>>
>>>>> For take-off you are supposed to
>>>>>
>>>>> 1) click the start engine flightplan block
>>>>> 2) click the takeoff flightplan block
>>>>
>>>>
>>>> Hmm. I did that, I think. As I say, it didn't take off, but it did spin
>>>> the props.
>>>>
>>>> What would I expect to happen at these two stages?
>>>>
>>>>>
>>>>> We have no experience (yet) with flying in raw mode with the Parrot
>>>>> Flight Recorder.
>>>>
>>>>
>>>> Happy to help debug, but not sure what I'm looking for - why might the
>>>> GPS prevent takeoff?
>>>>
>>>> I do have a ublox GPS on order, btw.
>>>>
>>>>>
>>>>>
>>>>> -Christophe
>>>>>
>>>>>
>>>>> On Tue, Oct 1, 2013 at 10:46 AM, Ben Laurie <address@hidden> wrote:
>>>>>>
>>>>>> Ping?
>>>>>>
>>>>>>
>>>>>> On 30 September 2013 14:46, Ben Laurie <address@hidden> wrote:
>>>>>>>
>>>>>>> OK, so I got the Flight Recorder working is sirf mode.
>>>>>>>
>>>>>>> But when I tried to actually fly it, it was a bit weird.
>>>>>>>
>>>>>>> At first, it kept losing GPS fix and switching itself into KILL and
>>>>>>> refused to do anything. After a few restarts, it seemed to stop doing 
>>>>>>> that,
>>>>>>> and switching to the Takeoff block span the motors up, but not fast 
>>>>>>> enough
>>>>>>> to actually take off - it just sat there with everything spinning.
>>>>>>>
>>>>>>> Am I do something wrong? What am I actually supposed to do for
>>>>>>> takeoff? Go to Start Engine first? Or what?
>>>>>>>
>>>>>>
>>>>>>
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>>>>>>
>>>>>
>>>>>
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