https://www.pine64.org/
https://github.com/merbanan/rtl_433
funcube dongle
https://github.com/greatscottgadgets/ubertooth/wiki/Ubertooth-One
USB Hub
RTL SDR
DireWolf APRS recieve only iGate
433 Wireless Sensor data collection, using MQTT to push data to DB and custom CBEACON in direwolf
ADSB
WWVB using EverSet ES100
WebSDR?