Mikrokopter Mikrokopter FC 2.1 with an I2c error

[Bartman]

Hi everyone,

I've also posted this on the MK.de site forums to see if I can get some guidance as to how to troubleshoot the error and repair it. WOuld any of you happen to know about this? If I get the answer elsewhere I'll post it here so it goes into the site records.

THanks,
Bart

 

[Aerial Media Pros]

Hi Bart. I was getting that error and couldnt solve the problem for over a day. I replaced the molex and ribbon cables, both with no success. Turns out one of the wires on a Capacitor had broke. The capasitor went through the ESC, and then into the power Dist board. The wire had broke underneath between the BL and the PDB. Looking at it from the top, everything looked fine, but when looking from the side, You could see the Capacitor wire was broke. Hope that makes sense. Once I replaced the Capacitor, the problem was solved and the I2C error went away. That was a long while back. I began using hot glue to hold the caps in place, to prevent them breaking from vibrations. I have not had a problem sense.

 

[Droider]

Hi everyone,

I've also posted this on the MK.de site forums to see if I can get some guidance as to how to troubleshoot the error and repair it. WOuld any of you happen to know about this? If I get the answer elsewhere I'll post it here so it goes into the site records.

THanks,
Bart

Welcome to the world of the 12c error buddy.. I no longer have to deal with them ;-) If you search my posts on the MK.de site you will se a whole thread I kept going on the subject with some very helpful advice.

Search for them on there using my real name.

But AMP has given u a good starting point to check. What are the lights on the BL's doing?

Dave

 

[quadcopters]

Bart I have replied to your email.
Usually as said in the email first go over all solder points on the BL Board , ie bridges caps etc and then its a case of taking isolating one by one till you find the menace
Also as Dave just mentioned check lights on the BL'S

Hope you find it .
Geoff

 

[Bartman]

thanks for the replies guys but i'm getting an I2c error message with the FC plugged in to MKtool without the power ring hooked up. also, i use a red JST connector for the I2c circuit so the molex is unused. it's the FC that is generating the I2c error so I'm especially baffled.

there's got to be a burned resistor or something causing this....i'll give it another look.

 

[Droider]

U want an replacement Bart!?

 

[Bartman]

i thought you sold all of your extras Dave.

 

[Droider]

i thought you sold all of your extras Dave.

U got no Idea!.. I got more stock than u can shake a stick at..!

I have a Fc which has quite a few hours on it and was the best I had out of the four I have owned.. I have a complete MK Hexa stack with BL's in a Hexa HL with coolers only flown for about 42 mins but I want to sell that as a complete MK set up. I also have a few BL2's kicking around and caps for them.. Not sure how many I would have to check. I also have 8 AXI motors, 4 emax and 6 18amp HW P speed controllers lookingfor a new home... and thats just what I can think about now!

Dave

 

[Bartman]

just reflashed firmware .88 and the error is gone. we'll see if it stays that way.

thanks for the help everyone.

Bart

 

[Bartman]

........and it's back.

 

[Pablo74]

Welcome to the world of the 12c error buddy.. I no longer have to deal with them ;-) If you search my posts on the MK.de site you will se a whole thread I kept going on the subject with some very helpful advice.

Search for them on there using my real name.

But AMP has given u a good starting point to check. What are the lights on the BL's doing?

Dave

HI all, excuse me if I'm intruding, I also I think this problem caused by an overload with some woodpecker perhaps high absorption.
I have the BL number 4 which there are 4 red flashes while the BL 5 does not come on their own.
Initially Mktool said BL 5 is not found, then I2C Error.
Any idea?
thanks
Giorgio Giorgio

 

[Bartman]

Giorgio,

Do you get an I2c error with just the flight control hooked up to MKtool?

I'd pull BL5 from the power ring and then hook it up to MK tool again and see if it still generates the error code. You don't have to completely remove the BL, just remove the two jumpers in the I2c holes for BL5 and then separate the end of the BL from the power board. it will still get power but it will be off the I2c circuit for testing purposes. let us know what happens.

 

[Pablo74]

Giorgio,

Do you get an I2c error with just the flight control hooked up to MKtool?

I'd pull BL5 from the power ring and then hook it up to MK tool again and see if it still generates the error code. You don't have to completely remove the BL, just remove the two jumpers in the I2c holes for BL5 and then separate the end of the BL from the power board. it will still get power but it will be off the I2c circuit for testing purposes. let us know what happens.

Hi Bartman, as I said I exaggerated with the payload for tests
and even though I had 36A on telemetry for my hexa something is disassembled successo.Ho BL 4 and I noticed a track skipped, likely even a mosfet

 

[Bartman]

Update on my Mikrokopter FC issues

I've been trying to play with the firmware update and EEPROM refresh to get the I2c error on my FC to clear. THis has been without a power board hooked up. It appears that somewhere on the FC is a switch that registers the presence of the power board, probably when the I2c circuit is closed. That switch appears to be stuck in the closed position and the FC is looking for the power board even when it isn't hooked up. I believe that this is what is causing the I2c error but I wouldn't know which little SMD to replace on the FC to fix it.

When this problem started I began to look for the I2c error on the power board without thinking it was possibly on the FC. I pulled all the I2c jumpers BL by BL expecting to find the one that would clear the I2c error. That didn't happen though and when it finally occurred to me to hook up the FC to MKtool without the power board, I saw that the I2c error was being generated by the FC.

So last night, after playing with the FC for a little while I decided to get the power board all put back together and see if the I2c error would clear once the FC had a closed I2c circuit again. With full Lipo power and a good power board attached, the FC is once again giving a green light for the BL's. WIthout the power board it still generates an error.

I'm thinking it's safe provided I don't fly without the power board hooked up. Anyone care to agree or disagree?

Thanks,
Bart