The Nano running this program communicates with the CAT interface in the Kenwood TS-590SG, reads the current frequency (band) data three times a second and outputs it in the standard Yaesu BCD format at its pins 12, 11, 10, 9 (A, B, C, D, respectively). It should also work with the TS-890. BCD_NANO.ino P.S.This Nano…