MultiWii

Thanks for your input, We assume the transmitter as a reference for rx signal lengths. This suppose that transmitter has all values by default, so we will "never" exceed the "1000" msec range! So for example throttle reads 1020, pitch/roll/yaw averaged 1530 => diff=510 (if the di...

Happy new year! Idea is to avoid setting the endpoints of transmitter to "1000" ... "2000" in the gui. We “assume” then throttle(1000)-pitch(1500)=500 msec, read the real values, make the ratio... To do so, a transmitter calibration has to be done once. During calibration, thrott...

Yeahiii!, its working
Thanks a lot!
manu

Is there a release based on v2.1 that make the serial work on a atmega32u4 board (drofly)?
Could i use this one?
http://code.google.com/p/multiwii/sourc ... Wii_shared

thanks,
manu

Hi, I tested Mis code and mine regarding the supposed temperature drift problem with the GYROCALIBRATIONFAILSAFE option (heat gun while power up). Both do calibrate well without problems. Invensense gyro MPU6050. I don't think many people still do use piezo gyro's, these were really temp sensitive, ...

Since temperature will affect gyroZero values, we could store the gyro temp after a successful calibration, if the temp changes a warning should tell us to do a manual recalibration... or if there a magic formula that compensates the gyroZero values base on temp changes after calibration... Is there...

(by the way the line after #if defined(GYROCALIBRATIONFAILSAFE) “previousGyroADC[axis] = gyroADC[axis];” should not be there…) This statement set initial value of previousGyroADC at start of calibration (if calibratingG == 400). Without this, if the copter is stable at startup, the first attempt to...

Could you come to a conclusion here? Is the code i posted in the beginning a valid option? ALWAYS do a manual gyro calibration before takeoff (for the gurus) OR Automatically calibrate after power up, with correct working code (for the Mormons that expect code logic could do it for them) thanks, manu

The way you do the calibration is different from mine! If I get it correct, you check every 10 samples (out of the 400) the difference of current gyroADC with previousgyroADC(10 samples before) for the 3 axis. If there is a difference you reset calibrating=1000 (not 400?) to start over. (by the way ...

Again, the way i do the calibration (movement detection) is to do 2 calibrations after each other, compare, if == it means no movement and the gyroZero's are correct! Even if temperature affects gyro, it should settle at a certain point, and the 2 calibrations will be identical. Am i missing somethi...

No!
The code i posted is called only in setup, and only on power up as long as you don't keep the copter still, it loops calibrating.

I fly like this now and this is the way it should be imho. You can still calibrate via sticks after if you want.

manu

i don't find GYROCALIBRATIONFAILSAFE in v2.1 ?

Good! But i can't imagine doing a gyro zero calibration without this movement check! Why is it not enabled by default ?
Thanksmanu

So, i came up with this: Goal, when board is powered up, and the board moves, continue trying to find gyro zero's (gyro calibration) Alex, or some other developer, can you tell me if this could be written using less variables. Is the the right place to do it? manu In void setup() at line // calibrat...

Hi, I have had weird behaviors when starting motors after power up the copter. So if i hold the copter upsidedown and move it while powering the board, arm and start, sometimes, not all motors start at the same time. If after power up, i do a gyro cal. all is smooth! So, for now i always do a manual...

Yep, its X4
With the changes posted above, its working for the sensors. Rx are still all active, but that's ok.
This method of tuning pid is the best imho.
manu

Just take the props off the motors you don't want to have an effect on the airframe, would that work? or disconnect the motors all togeather No, you don't get it. I hang the copter left and right wit a rope. My goal is to only PID tune 1 axis (pitch), and roll & yaw should be off (sensor : this...

Still have to disable Rx commands for roll & yaw ...

It is for tuning the PID on a test bank, between 2 ropes (not flying), and i don't want to get influences from the other axis. //in config.h #define PITCHAXISONLY 1 // in main loop at the end ... //**** PITCH & ROLL & YAW PID **** for(axis=0;axis<3;axis++) { ... axisPID[axis] = PTerm + ITerm...

Hello, (my first post here) I want to tune the PID settings for gyro. What is the easiest way of having only 1 axis (pitch for example) active, all other axis are off. I tried setting PID of roll & yaw to 0 (zero) but ideally the rx should also be turned off. So the goal here is that only the pi...