MultiWii

crashlander

@dr.tom That (and one after (even less official)) release was successfully tested many times on flying wing by me, my friend and rbirdie001 (on plane). Tests on my side were done using Crius AIO Pro (Mega2560) and serial GPS (UBLOX and NMEA). IMO planes/wings that have wider speed margin are easier ...

crashlander

@jallee & nafix I suggest you two read more in some later posts about serial control of MWII (probably nobody will remember about 1.9 since serial comm. was totally redesigned since than). Most of those apply to any kind of serial communication (cable, APC802, XBee,....) 1. MSP basics: http://ww...

crashlander

Hello!
All serial ports will comunicate with MSP devices by default (nothing to set). Only thing you can change per port is its baud if you need to use device that is not 115200bps compatible.

Regards
Andrej

crashlander

Try to decrease rc rate maybe or set some expo on Tx. RC rate as set in MWII GUI has no influence on YAW (as discussed in a thread from couple of days back). @ben995: YAW on multicopter is far less effective than on CP heli so probably you will not have any issues flying with default setup. Also on...

crashlander

Hello! Sorry bout I do not really understand your question. My code is divided into two versions, original one with analog reading and new for reading sumPPM signal from TX trainer port. New sum PPM code (m) consist of only 3 files (one with function for reading/ decoding sum PPM signal, another for...

crashlander

Then I tried adjusting GPS hold PID tuning, while hovering in PH.... That did not turn out very good. At some point when uploading ('write'), the copter quit, and it fell down.... Wilco. Been there! Done that! Wrote about it! And got mixed responses but most of them was that is probably my setup......

crashlander

Hi, MSP_SET_RAW_RC does exactly what its name suggests: it sets raw RC values in range from 1000 - 2000 for each channel (curently 8 channels) and that is same the normal RC receiver (35MHz, 2.4GHz...) would do. So in our case sending (for the main 4 channels) 1000,1500,1500,1500 means zero TH and &...

crashlander

@QuadBow The functionality is in _shared from around 2.1 release. Thank you for your tip, but that same GPS worked O.K. on Mega board with dedicated serial port (auto-configuration and stuff...) that is why I suspect the problem lays in sequence/delay of ProMini sensing GPS availability and GPS setu...

crashlander

With the defines from my first post you can enable serial GPS on ProMini with autosensing at startup. If GPS is present serial port works as GPS serial and if there is no GPS frame at the time MWII checks than serail port becoms standard serial port for GUI. That functionality works O.K. for pure NM...

crashlander

Unfortunately I do not have I2C LCD just serial one.

But it seems that combination of ProMini and not configured UBLOX does not work (maybe "race condition" between sensing algorithm and the one for configuration

).
Regards
Andrej

crashlander

Hello,
anybody knows/uses combination of NEO6 (binary protocol) with

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#define GPS_PROMINI_SERIAL
#define UBLOX

Does it works, any known quirks?

Regards
Andrej

BTW: How to check its working on the ground (any known LED behavior)?

crashlander

Hello,
it is known issue and should be fixed in current dev. (_shared).
viewtopic.php?f=8&t=3480

crashlander

Make sure that stick endpoints are from 1000 to 2000 and hold them in max/min position for a second when using stick commands.

Regards
Andrej

crashlander

@alll
Never used I2C version and can not comment on that.

Regards
Andrej

crashlander

felixrising wrote: recommendation was 10Hz for the uBlox NEO-6m stuff....

NEO 6 is by spec. 5Hz device that can also send data with 10Hz (twice same data) (was discussed a year ago in this or the thread with name "Neo6 fails to perform on mega...")

Regards
Andrej

crashlander

If you select: #define UBLOX MWII will try all baud rates to determine GPS current one and than it will set/override whatever was set before with proper settings for ublox binary protocol, refresh rate (5Hz) and speed that you set with: #define GPS_BAUD 57600 And for ublox binary 57600bps is enough....

crashlander

P.S. Do you know of any project using these modules, that offers transfer of pure, unscrambled serial date.... no need for a PPM style RC control link.... just the serial link... Your friend should probably look for something like APC220 or APC802 m m Those two works up to 19200bps air speed and en...

crashlander

MWII uses 490Hz refresh rate for ESC control.

Regards
Andrej

crashlander

Just wild guessing....
try disable FAILSAFE!?

Regards
Andrej

crashlander

Had alike/same problems last year on late dev versions (pre 2.1) and Crius AIO Pro, when powered from ESC's!
Later I switched to external BEC and since than it is O.K.

Regards
Andrej

crashlander

Hi crashlander when you say "flash them with extended range (0-2000) " you mean edit predifined throttle end points and set ppm working range from 0-2000 or enything else ? Yes extended range means to set allowed/valid/useful TH range from 0 to 2000 us instead standard RC 1000-2000. If yo...

crashlander

Thanks for answer. But I just want to know if I still need to upload this file to my GPS with MWii v2.2 or not because GPS on my quad works pretty good. After 2.1 Eos and Alex implemented full NEO configuration directly into MWII (serial version at least). It means no additional configuration of NE...

crashlander

What about that strange beeping at the end? I do not have beeper on any of my MWII's so beeping is unfamiliar to me. My plane have quite weak engine (thrust about 60% of plane weight) Also my wing has poor push/weight ratio but it still climbs easily with CLIMBTHROTTLE 1950. very low safe height (e...

crashlander

Ugly crash! but while the plane was falling I tried to stick control the plane at least to slowdown the fall but it looked that no stick input had any effect. It is quite possible that during descend the plane was in very stable stall turn and thus the lack of stick control. means that navigation wi...

crashlander

It should work without issues just set #define MINTHROTTLE 1064 // special ESC (simonk) If you are flashing ESC's by yourself you can also use/try ziss_dm's wii-esc (m) and flash them with extended range (0-2000) and in this case you must also set #define MINCOMMAND 1008 // (**) #define EXT_MOTOR_RA...

crashlander

@Crashlander, this maybe a very interesting project for you, integrating the MP_SET code to this: m Thank you for your tip! I moved from totally modified Futaba F-14, to DX7 "module" to avoid additional electronic components and this way I also simplify the code (al the trimming, center a...

crashlander

@copterrichie Yes I'm aware of the underlying issue! But I'm just saying that I can not currently confirm any real differences between using DX7 natively and MSP (over APC802 link). And today I was testing just that with FFF, sharp turns and some loops and the only limiting factor today was bad bear...

crashlander

Hello! I'm flying my own version of RCSERIAL TX (m) using APC802 and APC220 over 19200 baud and with 40Hz refresh rate, with default setup (it means every MSP command is confirmed by MWII but TX is not waiting for it) and the delay/latency/lag in copter response is IMO negligible. Now I have better ...

crashlander

Thank you for your answers.
I can see now that

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headSerialReply(0)

is moved to

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s_struct_w

.
Today I have tested both methods from same TX (MSP style with my mockup of APC802 and APC220 and controlled thru teacher/pupil port) and switchover is really nice.

Regards
Andrej

crashlander

@dr.tom
Operating 300km/h+ planes over shaky FPV link it's almost "criminally insane" by itself.

But the current (from march) code is IMO stable and tested enough that you can put it on your X8 and test RTH from couple of km (I have only tested it on sub 1km distances).

Regards
Andrej

crashlander

@Alexinparis How is failsafe detected/treated in your new addition? Is it possible to create one-way RCSERIAL link (suppressing MSP response)? It could be useful to suppress switching for those that have slower uplinks and are satisfied whit one-way communication. Best Regards Andrej EDIT:Looking in...

crashlander

In my case I must confess that I'm also the one doing almost NO pid tuning (no mater quad X, quad +, Y6, flying wing). The only thing I change is RC expo (from 0.65 to 0.45) and on multy copters (where I use reflashed ESC) set P to double the default (use to be from 4 to 8 and now to 7). The rest of...

crashlander

For mpu6050 I'm using

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#define GYRO_SMOOTHING {20, 20, 3}

with no LPF and it works perfectly (with default PID's).

Regards
Andrej

crashlander

If you like to stay cheap and don't mind to learn something on the way you will take MWII. If you really like to use simple "BLACK BOX" technology (not be bothered by too much knowledge) and have plenty of money you will go DJI! And many go down that route. But in the end if you like perfe...

crashlander

:D awesome, you are a pioneer and I will add a wiki page for some of user videos as demonstration, I never saw the OSD running on fixed wing and loved to see it Well thank you! I felt it was necessary thing to have for proper analysis of fixed wing GPS functionality. In my video you can see that th...

crashlander

@Kayle: You can see its work on this video
http://www.youtube.com/watch?v=EKm6Imp43_c

Regards
Andrej

crashlander

Yes it is based on 2.2 (or at least one of the latest pre 2.2 versions (maybe even post 2.2 dev versions))!
So the OSD is working.

Regards
Andrej

crashlander

This really seems to work good now. Acyually the first proven rescue with RTH! I'm flying 5.8GHz and i have connected camera/recorder and small 4inch monitor on RX side and when you can see some static in my video the monitor blanks for at least 1 second and if the static continues the monitor stay...

crashlander

One more video from this week (wind test), this time with some comments.
http://www.youtube.com/watch?v=EKm6Imp43_c

Regards
Andrej

crashlander

brm wrote:the electronics is much faster as your eyes.
10km what ... height ... depth ... per hour ...
this is exact the feeling i have when i look at mw software components.

http://en.wikipedia.org/wiki/Air_France_Flight_447

Regards
Andrej

crashlander

take a crashcourse in physics. electronics in combination with sw cannot overrule the physics.... I admit that my physics and aerodynamic knowledge is a bit rusty at best... It depends how you define stall, if you are looking at it as stall turn's it is one thing, but AF447 (in 2009) was actually s...

crashlander

Airspeed sensor would be of great use on fixed wing platforms, so that the plane could "hold" a true airspeed against the wind and not stall... Its quite an essential sensor used in many other projects, now with the recent advances in PatrikE's fixed wing branch I would think it would be ...

crashlander

I can be wrong, but I'm afraid that degree of banking is relative to levelled plane. So in (theoretical) situation when the fast plane is already 45 deg. or even more tilted nose down and diving at 250 km/h when at once navigation is activated (maybe pilot lost control because of lost LOS and he wa...

crashlander

There was also discussion here http://www.multiwii.com/forum/viewtopic.php?f=7&t=2456&start=120#p33438 about slow introduction of navigation control to allow controlling also very fast planes. Even very fast planes will not break apart when actual turns are limited to 15 deg. in bank turns....

crashlander

Hard to be sure but I would say the element I marked with red oval is step-down regulator (probably with 65z5 marking). You can measure it and than connect 3.3V on proper leg. 1350571330.jpg Yellow cap is most probably on high side (5V) not on low (3V). Ironically (but luckily) those are the element...

crashlander

you need to define the 'stallspeed' and then this speed should be in place rel. to the wind. when the rel. speed to the wind is below the stallspeed then you need to dive. For this to work we need to know wind speed and direction... ...and this IMO is impossible/hard without air speed sensor. Maybe...

crashlander

Today it was another nice day for RTH and PH testing (sunny with stronger gusty winds) The code is now really sweet and it is working perfectly despite wind. There should be some dampening on servo otputs to avoid the ratteling... True but probably not so problematic since it only happens above home...

crashlander

@rbirdie001 Your setting of: if (GPS_distanceToHome <=15) dif=0; //fly straight over home makes your plane to "autolaunch" and fly straight until the code detects that it is 15m far from home. That is why Patrik's suggestion to set if(curr_Gps_Alt < 15){dif=0;} is safer since the plane wil...

crashlander

@PatrikE: you probably meant if(curr_Gps_Alt < 15){dif=0;} . You are saying that setting #define FAILSAFE_RTH false should ENABLE FAILSAFE_RTH? If not than there must be problem with my setup (Spektrum DX7, and AR7000something) since when I switch of my TX it only sets TH to 0 and MWII does not acti...

crashlander

@dr.tom: #define RTH_BAILOUT true means that plane will try to reach safety/set hight with level wings (only climbing and not turning) any time when RTH is enabled not only when launching! So it is quite possible to trigger it 40m high and downwind (when set hight is 70m) and when the battery is is ...

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