MultiWii

jevermeister

My OSD works normal in both cases. sometimes the gps data works even works. can I do something to help you finding it?

jevermeister

Hi, gps data freezes when I use the osd.There seems to be a problem with multople serial ports in 2.1 on mega2560. would it be possible to send the data to osd via i2c?Maybe I can help programming it...

Nils

jevermeister

okay I will have a look at it too. wonder why the osd works perfect...

jevermeister

yeah richard.that seems to bw the right explanation. Sometimes it seems to wotk again... I think I will update to i2c gps. i2c osd would be nice too...

jevermeister

Hmm. I use serial GPS.I believe my data freezes ehen below 5 sats...

Nils

jevermeister

that was my question. will the data in msp still be updated if below 5 sats?

jevermeister

Hi,
thank you for answering Andras.
But will the coordinates be updated if I fell below 5 sats?
Nils

jevermeister

Hi, I am using an OSD now and noticed that the GPS data freezes and and the whole GPS is unusable. I wonder, what happens if the number of sats drop below 5. Is the GPS not updating anymore? Nils It took my GPS very long to get a fix, is it because of the dense weather or the low temp? It was faster...

jevermeister

solved. had an error in the firszrun of the sequence
already fixed, tested and commited

nils

jevermeister

its not my code... I only put it into a define clause.
feel free to erase it.

the battery facts are correct. I was wrong. sorry

nils

jevermeister

scrat wrote:But I always leave my quad outside in winter for about 20 minutes before connecting battery. I wait for gyros to settle in cold weather.

that is a correct behavior especcially for the battery and the cpu but I do not have time for that every time I fly.

Nils

jevermeister

Hi, I am happy that it works for you. I had several problems with functions like this when I moved gyros from warm inside or car to cold outside. I tried that with a whole selection of gyros. This is the reason why I am against a default activation - I stated this countless times before btw. scrat: ...

jevermeister

hi, scrat you can try to uncomment it and see if it works for you.if not then you can comment it again. that was the whole intention. By disabling it default I wanted to prevent the idiots that do not read the manual from killing their copter by arming, or getting nts because the copter is unable to...

jevermeister

Who said I am guru?I gave a technical explanation why I am againat rhat everytime I stared my point. What more do you expext? That "someone" who changed the geature to an option was me - I even explained why. FYI: You can see who changed the code in SVN. If you do not like it, then change ...

jevermeister

Heard that. But what if the gyro won't stop restarting calibration because of temp drift?I experienced that the last time I tested this. I' d rather fly with a not proper centered gyro than with a gyro that tries to calibrate over and over again. This topic has been discussed three times in multiwii...

jevermeister

we had this discussion weeks ago. gyro calibration is influenced by temperature. so automatic repeat can lead to an unflyable copter. especially if you can arm it while it is still trying to calibrate.

Imho everybody should manually calibrate the gyro after powering up anyway. No toy!

jevermeister

Hi,
I use everything I have. I had trouble with the old PL code regaridng CPU load.

MEGA 2560, GPS ,baro, mag, gyro, acc...

I did not notice this behavior while motors are off, I tested it by switching amnually between vbat1,2,3,4 etc. and everything was ok...

jevermeister

Hi,
I transferred the pl code to my 2.1 branch.

The beeps get cut off for level 1 and two. very weird...

jevermeister

Hi,
I transferred the pl code to my 2.1 branch.

The beeps get cut off for level 1 and two. very weird...

jevermeister

I noticed some weird soouns withe battery level warnings and pilotlamp inflight...

nils

jevermeister

I need some testers for vbat alarm via buzzer or pilot lamp.

jevermeister

Ha,
got it!

I found out, that the GND between FPV TX and cam differs from the GND of the FC,
I have a resistance of 2Ohm between those GNDs.

I wonder why the FPV TX is doing this...

Is it save to interconnect the GND on the FPX TX?

Nils

jevermeister

Hi,
I have 4,6V from the Serial Ports 5V pin

2Ohm between GND of RX and GND on serial port.
I tried several things:
Powering 5V from RX or ESC does not help

I tried to get GND from ESC but without the cam the OSD does not work.

Nils

jevermeister

ok. I ll try that when I am home tonight.

My RX is powered by the flyduino FC. So the 5V should be as noisy as before.
The wire that connects the fc to the osd s very long. is it possible that the motors xause a magnetic flux?

jevermeister

hi, extended endpoint are out of spec so it is okay for failsafe to kick in in my opinion...

jevermeister

gyros are measuring angular velocity. that is absolutely not connected to the position just to the angle of the movement. the acc however gets affected by off center installation if the copter is doing fast transitions, because of the bigger g forces that are connected to the diatance to center of r...

jevermeister

Had the same issue aome time ago.
I believe Hamburger ran into that a few weeks too.

jevermeister

Hi, thank you.
As said above. I connected it to the GND that is between FPV-TX and Cam.

I will rry another 5V. I use the 5V of the flyduino, that is supplied by a single ESC.

Nils

jevermeister

Hi,

thank you for the hint.

I connected the OSD to ground between camera and FPV TX, the TX is connected directlys to the LIPO.

I get 5V from the serial power connection on the flyduino, if I understood the previous post correctly, this should be the problem (?)

Nils

jevermeister

Hi, thanks to Michal's awesome service I got a repaired OSD in a short time. THANKS Michal. I connected the OSD to my Flyduino and everything is working perfectly now! T H A N K Y O U !!!! I am so looking forward to my first flight!!! I noticed that the OSD starts to flicker when I arm and the engin...

jevermeister

Hi,
I lowered D for yaw to zero and the shaking si gone

But the copter is drifting now,
I will increase yaw D bit by bit now and see what will happen.

jevermeister

Will this have an impact on my working config??so can any dev fix it?
nils

jevermeister

in the last devs there is an option to reroute the outputs. but it not hard to do it in the standard 2.1 if you look into the def.h

but if it is a board specific thing this should be made into a define and comitted into the shared trunk.

jevermeister

you have to connect 5v and gnd too

jevermeister

I am not merging by hand but I want to understand the code I contribute. I wanted to say, that I have a bad feeling everytime I commit something for someone I do not fully understand.

nils

jevermeister

hi, there is a list of people who can alter code over at the google code repository. I looked into my mqilbox today and found no mail regarding this. I did not follow this thread closely enough to feel adressed to upload this code. I would suggest to contact one of the devs to merge the code. How sh...

jevermeister

Hi, dude I want to have a changea too but no one gets everything he wants. Make a proposal for a adaptive serial protocol everyone can change as he wanta and we are in but you are the only one who asked for this and now it is a problem if it not coded at once.? fyi: we did a lit of changes in the pa...

jevermeister

then apply a hard to miss failsafe throttle and a short time period for testing. this will help you now. but the indicator you propose seems a little but useless in real life. i use debug vars for that.

nils

jevermeister

ask hamburger on how to configure current sensor.
tip: monitor consumption with sensor not connected to battery this value needs to be subtracted. you addiruonally need a loepass filter ir a moving average software filter

nils

jevermeister

buzzer and pl indicate failsafe.

nils

jevermeister

in which cases do the problems occur?How come it that nobody reported it yet.I think if there is a bug, we should fix it and not circumvent it. Not all users are smart enough to circumvent this. I would apply the patch if it is save and tested.

nils

jevermeister

Hi,
has this been changed recently? I have no problems in <=2.1...

Nils

jevermeister

multiwii code is correct. I used sum signal with several controllers and had no problem.
U have to rearrange channel order in er9x. to the futaba settings and it works.

nils

jevermeister

Hi,
thanks - I tried to uplaod it with the arduino tool using arduino isp, but it did not work out

Nils

jevermeister

Hi,
I am unable to connect to the osd chip,
I tried to reflash the bootloader but nothing helped,
I always get: avrdude: stk500_getsync(): not in sync: resp=0x00

Michal, can you help me out here?

Why should I connect the 5V at the moment the compiler is finished? Will 5V from FTDI be enough?

Nils

jevermeister

Hm, I think I made a mistake: I first tried to connect FTDI->OSD as follows: TX->RX, RX->TX, VCC(OSD)->VCC(FTDI), GND->GND I got not in sync, then I connected VCC to VCC of my Flyduino and did not share this VCC with the FTDI, so this was a mistake... Could this kill the OSD? I have fond my arduino....

jevermeister

I reverse engineered a pro mini to do this task while I was flashing my t9x TX

jevermeister

Unfortunally, I only own a FTDI.

What is the blinking LED indicating?

What a bummer, the 5 minutes with a working OSD were very cool :-/
Nils

jevermeister

I use a 5.8GHz 200mw FPV System, but the SOD was working before I tried to flash it, after the flash attempt no more OSD

Is it possible, that I killed the osd whyle trying to flash it?

I first tried to get VCC off the FTDI...

jevermeister

And to complete things: OSD is not working anymore: The onoard red LED ist just slowly blinking but no graphics overlay on my screen.

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