20 meter shield for the Raspberry Pi 2 that is set up for digital modes like WSPR.
Would be more interesting to me if it were built for 30 meters. Seems like nobody wants to build SSB gear for 30 because…well…because SSB voice is verboten on 30, I guess. SSB digital modes are perfectly legal on 30, but there’s nothing small and inexpensive for 30 meter SSB like there is for many of the other modes. And now we’re in a circular argument….