Horacio Bouzas on Twitter: "Step-by-step building a WiFi HF/VHF ham radio antenna switch https://t.co/BgjfAMdd6Z #esp8266 #esp32 #hamradio# #antennas @arrl @dxzone… https://t.co/fDfHDfnJu7"
MFJ-1701 6 POSITION HF ANTENNA SWITCH
Sonoff 4CH with ESPEasy - Page 3 - Let's Control It
Four-Position HF Antenna Switch with PC Control | Nuts & Volts Magazine