onionI2C Import Error

ZwiebelMax

Hello,
i want to control the relay expansion board with a self written python script. Therefore i followed this instructions:
https://wiki.onion.io/Documentation/Libraries/I2C-Python-Module
Consequently i installed the pyOnionI2C module and the "Omega Expansion" folder including the OnionI2C.so file are placed in the package path.
But when i try to run a python script including this line:
from OmegaExpansion import onionI2C
I get the following error message:

Traceback (most recent call last):
File "testi2c.py", line 1 in <module>
from OmegaExpansion import onionI2C
ImportError: Error relocating /usr/lib/python2.7/OmegaExpansion/onionI2C.so: i2c_writeBufferRaw: symbol not found

The firmware is up to date and I am using the omega 2.
Can anybody help me to handle this error or what modules do you use to communicate with I2C devicese?

Thank you,
Max

Jakub K

Check if you have both libonioni2c and pyOnionI2C installed in same version:

$ opkg list-installed| grep -i onioni2c
libonioni2c - 0.5-1
pyOnionI2C - 0.5-1

Probably you have incompatible version of libonioni2c. Upgrade it.

ZwiebelMax

Genius!
Thats it. Now it works.
Great, thank you very much.
I can´t imagine how I should find this little but important difference.
Hope it will help other people with the same problem.