I'm using arduino and instrument-control packages at the same code. I criate an object ms = arduino() that use port "COM5", because I want to send data with my arduino. I need to use the SPI communication protocol. How should I set the port? If I set with "com5" returns Access denied, and with ms (my variable) it doesn't work too. Did anyone has an exemplo of SPI communications with Arduino and octave? Thanks.