MultiWii

Hi, my new bicopter build is complete as for hardware design and setup. MultiWii software is Release 2.1 As for electrical connections the settings are: the 3S Battery powers up both ESC, Each ESC powers one servo via the BEC, the Arduino Mini gets 7v from the charger plug, then it powers the Blueto...

It would be nice if it was an off-by-one error.

unfortunately it isn't.

and I don't have an reply from multiwii, not even an error.

Hi there, I've been fighting for the last 4 days with changing my program to cope with new Serial Protocol. You can check the code here https://github.com/luisfcorreia/bi-copter-wii-remote . The relevant file is Controller.java. (this is part on an Android app and a lot of stuff is ommited) /* * Val...

Hi again,

here's a new video showing off the new propellers I got.

Please note, it DOES NOT have a gyro installed yet! That is the reason I'm holding it.

http://youtu.be/ck8Udj4DpwE?hd=1

As for power, I'm using a 7805 1A regulator for servos and arduino. The ESC +5V output is not being used. Yesterday I found out that strangely, my remote has two different values on the sticks. Yaw, Pitch and Roll provide 1020-1960, with center being 1500. Throttle only goes from 1120 to 1860. I gue...

Hi guys, one year later, I return to my bicopter build. Here's a video of it's current build, where I'm just assessing if the remote sticks match the expected servo movements. http://www.youtube.com/watch?v=xWvBSTQ0DVQ Multiwii is running from SVN trunk as in last weekend, and the PID settings were ...

We can work together on that.

My android app can and will probably expanded to use wifly shield, just let me know the exact features it does support.

(Remember, a non-rooted stock Android will not connect to ad-hoc wireless networks without major hacking.)

I'm not 100% sure, but I think the WiFly shield needs a TCP/IP stack on the arduino itself.

the BT_SERIAL mode relies on serial data being presented to the arduino.

To be able to fully reply to your question, I would need to analyse this module.

here's the video:

http://www.youtube.com/watch?v=PbvIaUnbc7M

Cheers,
Luis Correia

Hi guys, I'm currently on the codebits hackaton and will make a presentation tomorrow at 11:00 of how I'm building my bi-copter. While the presentation will be done in Portuguese, the slides are written on English. (the slides will be available after the presentation) You can watch the presentation ...

Hi,

during my tests I've found out that the multiwii copter stops responding and the LED on pin 13 blinks with 3 fast blinks and a short pause, in a tight loop.

What is this exactly?

Luis

Alex, about that 45º forward.

My motors are able to do the full 180º swing.

But the expected behaviour on startup is that the motors are vertical on power-on, 90º in relation to the ground, correct?

I've found the root cause!

It was my android app sending in way too much data then the Arduino could cope with.

I'm now sending it in at a 50Hz rate, just like the regular radio systems do.

Now I'm in the tweaking phase, in order to get the thing flyable.

I'm also sensing a new video made today

Hi, I want to use the AUX1 channel to arm and disarm the motors. The idea is to use the low setting (MINCHECK = 1100) to disarm and high setting (MAXCHECK = 1900) to arm. Is this the proper way to do it, or to I need to take an extra step or something else as well? http://img849.imageshack.us/img849...

Strange... I see that now, for some strange reason, the LED keeps blinking and nothing shows up in the GUI. I've got an Arduino Mini with an Atmel 328 (requires a special setup in the boards.txt file). Did you by any chance mixed up the I2C pin assignments? Will check back tomorrow for answers. Grea...

Well,

it seems that every time I upload a new program to Arduino, new PID values get to be uploaded as well....

oh well, must investigate further

Hi, Alex, please consider the following scenario: In the current SVN revision (339), change config as follows: #define BI #define BTSERIAL //#define FAILSAFE //#define VBAT //#define LCD_CONF In Serial.pde, add a section in the RX loop, providing a very static set of values, each time we receive the...

Hi again, I'm coming to the conclusion that some other ISR are interrupting the serial reception and thus I get garbled data. I'm also sending a "M" command from the Android application after sending in the Serial data, so that I can monitor the data from the arduino using the GUI. So, I n...

My thoughts, for ProMini or Mini: With BTSERIAL you can configure the arduino via an Android App (which I've failed to get going so far). So I would say that we could do the same for SPEKTRUM. As I don't plan for now to have a MEGA even for testing only, decide as you wish. I would vote for static a...

Hi Danal,

as long as it works, either way is fine be me.

Let us wait for Alex to decide, but I really guess that the code style used throughout the whole code is the way to go.


Luis Correia aka Buga

In the computeRC(), there is some kind of running average of the received values of the last 4 samples?

I ask because I've reduced the PID settings to all 0s and I still fail to see the intended movement.

PatrikE,

FAILSAFE is already disabled, it must be something else :=)

Luis

Well, for now the problem is not really related to loss of signal, but proper signal interpretation.

It may well be that the serial code isn't called enough times and it misses commands. must investigate the code even more.

I speak from experience, a bi copter tops the list in complexity. Sadly I now recognize my mistake. As for the remote control, all I have to say is that: analog systems send pulses with a predefined rate with information for the several channels. Doing that with Bluetooth is the same thing, sending...

Please explain why a radio system is an option, if the problems I'm experiencing happen without ANY radio control system connected?

(but thanks for the suggestion)

I think there is something fundamentally wrong here. I have just found out that if I call "computeRC()" in the main loop, the servo position are about 1500 for each side (vertical). If I don't, then the left servo is set at a twitching pace around 1500 and the right servo is about 1200. Th...

Hi Alex, technically, my servos can swing the motors a bit more then 180 degrees (full servo travel). I've been able to confirm that using one of the servo test programs for the Arduino. What I really find very strange is that the left servo just twiches and the right servo is tilted forward some 30...

Hi again,

is there a way to kind of 'dumb down' the corrections made from reading the sensors?

I need to figure out if the problems I'm having with my copter's instability are from bad gyro, bad build or just me.


Luis Correia

The fast mode produces even more instability...

I really need to hack more time into it

One more thing, I've used the GUI to setup BOXARM (high) in the AUX1 channel, but somehow it isn't working. So I'm unable to arm the motors to do test flights. p.s. this project will be presented it it's current form in m in about 15 days (November 12th) the presentation will be up in a live feed an...

Hi, I don't have a normat TX/RX setup. This is my intended setup and I can't see that it makes that much difference. The instability happens even with no RC signal, which to me doesn't seem normal at all. As for the sensors, I'm using WMP clones at low speed. I have two, with different chips and bot...

Hi all, this is my first post here. I've been working on a bicopter, in which I plan to control with an Android phone through a Bluetooth connection. Here's a video I made with yesterday's trunk and my changes added in. m let me know what am I doing wrong, and why the heck is it so unstable. And btw...