MultiWii

copterrichie

Hamburger wrote:but why? the wiki is already there. Much more promising to base additional work on what is already available than start from scratch. http://www.multiwii.com/wiki/index.php?title=Main_Page

There is STILL no direct link on the main www.multiww.com page to the wiki. Asked for that months ago.

copterrichie

There has be some serious attempts in the past to create a Wiki and documentation for the MWC, In my opinion, the issue is accessibility and who has the rights to make updates. I would suggest a system where anyone can make an entree but the Admin would have the final approval.

copterrichie

You really put some real thought into this list. If most of these features are implemented, MWC will rival any FC out there.

copterrichie

timecop wrote:
A fool and his money are soon parted.
Never been more true with "RTF" segment.

+1 and another +1

copterrichie

That is very impressive, from what I see, it is just a matter of more PID tuning. You should see some of my early development Bi-copter video.

Nice Job.

copterrichie

I made the following change to the MWC 2.2 output.ino file to reduce the YAW sensitivity. servo[4] = constrain(1500 + ((YAW_DIRECTION * axisPID[YAW]/2) + (BI_PITCH_DIRECTION * axisPID[PITCH])), 1020, 2000); //LEFT servo[5] = constrain(1500 + ((YAW_DIRECTION * axisPID[YAW]/2) - (BI_PITCH_DIRECTION * ...

copterrichie

P.S. I will have to verify this but I think there is only 200 steps in the PWM signal, I know this is true for the ESCs on Mega328p. So that would be 1000/200 giving each step 5. If the servos have a 120 degree range for a PWM 1000 to 2000 that would be 120 / 200 = .6 degrees per step. .6 degree of ...

copterrichie

Very interesting design, in fact, this is the very first I have seen anything like this. My major concern is, the resolution of the servos in a direct drive configuration like this. My personal experience, 10 degree forward and aft is enough for an traditional bi-copter. I have done some experimenti...

copterrichie

From what I see in the video, that is more of a mechanical linkage adjustment problem.

Secondly, the wobbling is PID

copterrichie

Looks really good however, that Buzzer may give you some headaches with your Mag.

copterrichie

Did you try the following?

Code: Select all

#define YAW_DIRECTION 1
    //#define YAW_DIRECTION -1 // if you want to reverse the yaw correction direction

copterrichie

I simply purposed the idea, we can create a thread to work out the detail or design specifications.

copterrichie

Just did a google search: http://www.rcgroups.com/forums/showthread.php?t=1250488

copterrichie

About auto-tuning The most important factor is the ESC delay .. the RPM change from the PWM signal change. How do you plan to put this in the GUI ? What are the maximum delays of all the ESC brands used? Seems to me, this information does not vary very much from a normal distribution curve and we c...

copterrichie

Just my two cents on Auto-tuning, I strongly believe this should be a function of the GUI. Enter all of the variables such as Weight, Arm Length, Motor KV, Battery Voltage etc and the results should get the copter flying. Fine tuning such as performed with APM can be done in the air or by a skillful...

copterrichie

dod22 wrote:I'm having the EXACT same problem , here's a video of my motors/gui's weird behavior

https://www.youtube.com/watch?v=2jAcJKu5igY

What happens if you were to move the copter about? In other words, pick the copter up and rotate it about its axises, them put the copter down.

copterrichie

Regardless, there are issues with all products out there and MWC is no exception. The Differences with DJI, they have a PAID STAFF to work out their issues where as MWC, you get the rest of the story.

copterrichie

You surely can not with APM, as for other DJI projects, they have their own issues like flyways etc.

copterrichie

One of the issues with the usage MWC that is not present in other systems like DJI is, the variances in each copter's uniqueness aka nonconformity of the copter to a standard build specification. Various factors such as Motor KV, Props, ESCs, AUW, CG position, Arm length all play a role in the over ...

copterrichie

renes, is all that is required to use your code is a SD Card Modular and any Mega328?

Thank you.

copterrichie

Good for you, I happen to like creating things from scratch, something that others are not doing. Enjoy.

copterrichie

If it was an issue of just having something that works, then Buy DJI and forget about it.

copterrichie

@copterrichie ... I totally find useless the i2c GPS module (a 328 chip wasted for a dummy task) ... but maybe build up an array of ProMini for make some computation task could be something interesting to explore ... but ... I'm not sure the added complexity of multi processor will really give any ...

copterrichie

Personally, I believe few can argue with the Mega328 and the Arduino IDE simplicity for development. Sure, some have complained about the Bitwise shifting but over all, most people attempting any modifications to the code have pretty much accomplished what they set out to do. I also believe other pl...

copterrichie

About accuracy ... In my bench test BMP180 has an accuracy of around 75cm ... more then enough for the MultiWii task. MS5611 has an accuracy of around 40cm .... Please note .. I speak about accuracy not of resolution. Also measuring pressure for guess the altitude is a method that has already lot o...

copterrichie

Hamburger wrote:maybe take it one step further and get the 360 sweep? http://www.dfrobot.com/index.php?route= ... ct_id=1125

Are you kidding? $398 bucks?

copterrichie

Considering how difficult it is to work with Google Development nowadays, moving the code to github should be priority number one.

copterrichie

Nothing personal, but there are just too many chiefs and not enough Indians around here. There is little to no cooperation but much competition and this is why things are in the state they are.

copterrichie

I fly with guys that own DJI products and it is clear to me, it is not the hardware that gives the product its flight characteristics but the start-up and calibration procedures.

copterrichie

Is it possible to do a factory reset with your program? I am not doing anything with the transmitter right now and will test it fully.

copterrichie

In all honesty, I have forgotten what the SWA, SWB, VRA values are for. I will seen if I can locate some documentation.

Oh, I remember now, I am using the Switches to activate ch5 and 6

copterrichie

Worked perfectly after installing the python-serial.

I need to clean the Trainer port connector because would get a checksum error but that has nothing to do with your work. Excellent job.

I have an EXCEED-RC

copterrichie

Thank you, very valuable. I have a similar T6 transmitter sitting, will give this a test.

copterrichie

P.S. there were someone else that were able to get the copter to circle them keeping the camera trained on a subject, nothing became of that development also.

copterrichie

If this is not an spam, follow-me was a topic here once but nothing much became of it.

viewtopic.php?f=7&t=3888

copterrichie

Just a FYI, I like the way you structured your send MSP code classes. That should make other applications very easy to implement.

Thanks again and a great job..

copterrichie

There is the option of softserial and turn down the baud rate on the Openlog to 9600 but I agree, for this application, it is not a very good. It would be better to create a sub-routine in the Wii Protocol to write directly to the Openlog with the desired variables.

copterrichie

Nice Job.

copterrichie

you are most welcome Rob,

Wow, here is a arm cortex M0 port: http://www.rcgroups.com/forums/showpost ... tcount=684

copterrichie

Made the following changes to make the airspeed sensor more compatible with the current method. protocol.cpp case MSP_STATUS: struct { uint16_t cycleTime,i2c_errors_count,sensor; uint32_t flag; uint8_t set; } st; st.cycleTime = cycleTime; st.i2c_errors_count = i2c_errors_count; st.sensor = ACC|BARO<...

copterrichie

That bluetooth modification works very well, even better if you can do both sides. I have a USB Bluetooth adapter I modified in conjunction to the bluetooth on the copter.

Nice Job.

copterrichie

The CY8CKIT-049 Prototyping kits support both the ARM® 32-bit Cortex-M0™ CY8C41xx and CY8C42xx device families. The PSoC 4 devices are the most reconfigurable ARM based processor providing programmable analog and digital blocks with flexible routing and interconnects. The CY8CKIT-049 Prototyping kit...

copterrichie

Sure this is possible. I think using DUE memory is one things that makes this porting useful and straight forward. Same idea implemented in Naze32. Yes sure you can do that but what is the benefit you will get over internal memory giving the current data you need to save for multiwii. Please correc...

copterrichie

Now, the accelerometer really shines when you want to keep copter parked in air. For a well designed copter and appropriate level of filtering, accelerometer should be able to keep copter within few cm when hovering. In Multiwii code, the input from two contributing sensors is nicely merged, result...

copterrichie

I just have too many projections underway and motivation is low to finish some of them however, one of the projects I want to play with is a vibration dampening plate many are using for the APM. I THINK if we reduce the vibration, we can improve the precision of the ACC especially the Z axis. Vibrat...

copterrichie

ezio wrote:But right now we also have this in MW and the accuracy is not that great.

In my opinion, I feel too much importance or bias is placed on the baro readings also the Wii is bit shifting the precision away on the ACC to eliminate noise.

copterrichie

I would assume by mixing the Acc Z axis with barometer readings. I recall someone did some experimenting around with using the Acc Z only for altitude holding.

copterrichie

Altitude holding has been a center of conversation for sometime now. viewtopic.php?f=8&t=2371

copterrichie

Hi, I worked during the last three weeks on adding Arduino_DUE to Multiwii v2.3. The end result is a code that can be compiled on ordinary 8-bit Arduino as well as Arduino DUE. Question for you please, considering the DUE is a large board anyway, would it be of any benefit using an add-on i2c eepro...

copterrichie

No Bells or fancy stuff here but here is a working patch that calibrate the Airspeed Sensor on start up. Adding a Button to the GUI and storing the calibration to EEPROM to come later. The airspeed is REFERENCE only however, maybe Patrick can incorporate it into his RTH and Waypoints routines. Scree...

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