Hello everyon, thi is my first thread. I'm working as a electronic designer at the E-Team Racing team of University of Pisa. We are using the UDOO board for the telemetry of our car. We have available the RFM12B module and I need to interface the UDOO board with the RFM12B module. In the library of the RFM12B module, I found this: // pins used for the RFM12B interface: // for DUE we only need to define these two pins // the SS pin determines which SPI interface will be used #define RFM_IRQ 8 // PWM8 Digital8 #define SPI_SS 10 // PWM10 SPI-CS0 PWM10 corresponding to SPI5 but no bit comes out pins. (I verified this by using an oscilloscope) I tried to change the SPI-CS0 pin with another pin of another SPI port but no SPI works. (I used the pinout diagram of the UDOO board). Which SPI can I use to connect the UDOO board with the RFM12B module? Thanks for the help.