MultiWii

Hi Alex, Just a small issue with ITG3200 driver. The ITG3200 requires some delay after reset to stabilize values (10msec by datasheet, as I remember). Currently we do not have any delay before we starting calibration. As a result calibration not always succesfull. (sometimes I had values 3-5 instead...

Hi IceWind!,
Any chance to make it open source?

Regards,
ziss_dm

Hi,

Musgravehill: This should work, I'm using the same configuration in my setup. And it works fine sofar..

Regards,
ziss_dm

Hi, I have small idea, how we could simplify/optimize/etc existing Complimentary filter in WMC. As I understand corrently we have the following procedure: 1) Calculate rotation grom Gyro in angles 2) Add this rotation in angles to the previous estimate. 3) Create normalized vector RGyro using angles...

Should work.. If not use 1.7.

Regards,
ziss_dm

Hi,

To be able to use nunchack, you would have to apply patch from here Direct connection of NUNCHACK

Regards,
ziss_dm

Hi,

This is patch for MultiWii1_preter7.

Regards,
ziss_dm

Arduono. ode file..

Can you also attach your SKETCH?

Regards

Hi Alex,
In the current implementation of the ITG3200 sensor, it's LPF is set to the 10Hz. It looks really strange setting for Gyro, as it would increase Gyro response time. Am I missing something and inventing a wheel or it is worth to try other LPF settings?

Regards,
ziss_dm

Hi, I have spent day trying to solve this issue using code workarounds, but was not able to find solution. Looks like WMP firmaware has mistake in code which converts 16bit signed values from the ITG3205 to the WMP's 14bit unsigned. That is why I decided to connect ITG3205 directly to the arduino. R...

Hi, For one who using this ESC's it is important to program them correctly, this sugnificantly reduces lag time and improoves stability. In my case I was able to increase P from 1.4 up to 3.6 without oscilations. This is my settings: 1) Low voltage protection - none 2) Startup mode - Acro (Fast) 3) ...

Hi,
Another possibility is to use something like this: http://www.androidzoom.com/android_appl ... _mgzm.html
And implement vt100 configurator in MultiWii.. Would not look cool, but will work..

Regards,
ziss_dm

Hi,
Rurek: Looks allright. I would probably supply power not from pin 12, but from VCC pin on arduino (currently it is not possible properly reset i2c devices, code implemented only for WMP)

Regards,
ziss_dm

Hi,
Has anybody tried this: http://wiki.processing.org/w/Android ?

Regards,
ziss_dm

Hi,

I have posted results of my investigation and patch here:
1_prebis7: ITG3200 driver: Overflow issue

Regards,
ziss_dm

Hi Alex, The problem was originally reported by "mistral": I try the ziss_dm mod with WMP V1.6 ITG 3205. Work fine but (their is always "but" !!) on quick movements the gyro's signal goes on the wrong side : http://wbb.multiwii.com/download/file.php?id=48&mode=view The proble...

I try the ziss_dm mod with WMP V1.6 ITG 3205. Work fine but (their is always "but" !!) on quick movements the gyro's signal goes on the wrong side : I try to divide like alex said on ITG3200 sketch, same result. I use fr3d 5v-3,3v LLC, I try disable/enable pull up resistor, same result. T...

You can connect low voltage devices directly to the arduino, but you have to follow the rules: 1) Disable internal pullups (or you can damage your devices) 2) Use external pullups connected to the low voltage source (3.3v or 2.8v) This is Alex notes about pullups: SPECIAL NOTE ABOUT THE PULL-UPS: - ...

Hi, The problem could be due com port enumeration. For example, if you have BT devices paired, it would try to connect each of them.. On my notebook I have to switch of BT before using configurator. Another problem could be phone management software, like Sony Erricson mRouter, which tries to open e...

Hi Alex,
Looks like PIDs for roll and pitch are swapped in GUI configurator. I'm zeroing all PIDs except one axis and testing quad in the hands.

BTW: My config: X Quad-copter.

Regards,
ziss_dm

Rurek:
If you have LLC, you can supply to Vcc (+5v) and connect Nunchack to the arduino and connect ITG3205 to LLC. If you don't it s better to use +2.8v from WMP and remove pullups from Nunchack.

Regards,
ziss_dm.

Hi, I'll try to explain how I did this mod: Hardware: 1) It is good idea to download ITG-3200 datasheet, for pin reference and Axis orientation: m 2) Find SDA/SCL pins on the ITG3205 and follow the traces. The should end up with i2c pullup resistors and go futher to the MCU 3) Cut traces to the MCU ...

This is the patch: *** MultiWiiV1_pre7.pde Sun Feb 20 23:44:00 2011 --- MultiWiiV1_pre7_acc.pde Fri Mar 11 13:29:25 2011 *************** *** 62,67 **** --- 62,68 ---- //#define ADXL345 //#define BMA020 //#define BMA180 + #define NUNCHACK /* I2C barometer */ //#define BMP085 *************** *** 227,2...

Hi Alex, What do you think about re-implementing multiple PID profiles. Now we have switches fully programmable, we also could assign PID profiles to them. I see the following benefits: 1) Easier ajustments - you can easyly switch between "OLD" and "NEW" values inflight and see d...

Hi Alex,
I have created driver for Nunchack directly connected to the i2c. It is implemented as additional i2c accelerometer. If you are interested, I can post changes here.

Hi, Yesterday I have connected ITG3205 directly to the arduino and looks like it is working correctly (bypassing WMP). It is actually not difficult. The advantages are: 1) Full 16bit resolution 2) Shorter cycle time 3) I can use WMP voltage regulator for other sensor. If somebody interested, I can p...

Hi, I just want to share my expirience: For me downscale solution does not working 100% correct. With slow motion everything looks perfect, bu then I started to move WM+ fast, it almost looks like it has overflow issue. The graph suddenly goes to the opposite direction. So if I strt shaking sensor f...

Hi Alex, Thanx again for the great job. I have small question about WMP calibration. Looking at the code I found the following: 1) It looks like WMP calibration proc. not taking into account slow/fast mode of WMP (or I missing something) 2) The gyroZero[] is applied before we make slow/fast mode aju...