Sonoff with external wifi antenna - Hardware and Blynk Libraries - Blynk Community
WIFI-ANT417 SR PASSIVES - Antenna | WiFi; 2dBi; linear; for ribbon cable; 50Ω; 36x14x1mm | TME - Electronic components
Small internal wifi antenna and shining LED lights embedded on circuit board. Light-emitting diodes, capacitors and inductor in green PCB detail. Tech Stock Photo - Alamy