https://www.hackster.io/news/deng-dazhong-s-rtl-sdr-expansion-board-brings-software-defined-radio-to-clockwork-pi-s-uconsole-6be05957cc2d
Internal add-on delivers receive-only SDR, with a GPS receiver and LoRa transceiver to follow.
rtl sdrexpansion boarddengbringssoftware