10DOF + arduino pro mini : i2c errors

[confrey]

hi everybody, here is the problem :

I'm trying to connect these elements :

- arduino pro mini board (exactly a clone, a Xino Pro Mini) with AT328;
- 10DOF GY-80

here a photo of what I'm doing :

https://drive.google.com/file/d/0B83dBSxPEiOoRXVpVkhIeHNIZXM/edit?usp=sharing

I'm using MW 2.3, QUADX configuration, in GUI I can see a very lot of i2c errors; I tested the good wiring connections more time, I think all is correct; the same DOF works fine connected to a Nano, using same pull-up resistors' values; I'm in a dead point, I don't know what I have to investigate more....

please give me some suggestions

regards

[waltr]

What is the I2C speed set to on the two MultiWii boards?
If set to 100000 on the Nano then ensure the new FC is set to 100000.

[Hamburger]

Disable pullups.
Shorten i2c wires.