ESP8266 Antenna Mod - extend WiFi range - DIY - openHAB Community
WEMOS D1 ESP8266 WIFI Mini Pro 16M Bytes External Antenna Connector – diymore
D1 Pro Mini ESP8266 with External Antenna — PMD Way
wifi - What kind of antenna should i use for my esp8266 module? - Arduino Stack Exchange
Wemos D1 Mini Pro 16m Bytes External Antenna Connector Nodemcu Based Esp8266 Esp-8266ex Cp2104 Wifi Development Board Micro Usb - Integrated Circuits - AliExpress
D1 Mini Pro NodeMCU WiFi LUA ESP8266 WeMos Microcontroller w/ Antenna – Envistia Mall
External Antenna for ESP8266 : 5 Steps - Instructables