In the last update of IanniX, you can deal with Arduino (serial port), MIDI, HTTP, OSC, UDP… protocols.
Releases are available on the new website : http://www.iannix.org!

Your problem is probably due to Little/Big-Endian format with float values. This bug is fixed in the new update of IanniX (for Windows, Mac OS and Linux). Releases are available on the new website : http://www.iannix.org!