ESP-SDR uses the undocumented raw I/Q capture functionality of ESP32 family chips to turn them into (low-duty-cycle) Software Defined Radios
ESP-SDR Scanner for FPV VTX channels
ESP32 2.4 GHz SDR
Native SDR++ source module for ESP-SDR on the ESP32-S3: real IQ over USB, no bridge needed
Web interface that displays the frequency spectrum and waterfall diagram for esp-sdr
SpyServer + rtl_tcp bridge for ESP-SDR on the ESP32-S3: real IQ over USB into SDR++, SDR#, GNU Radio and gqrx