Esp8266 Esp-12 Esp-12e Uart Wifi Wireless Shield Development Board For Arduino Mega R3 Module Mega 3.3v 5v Ttl Interface One - Integrated Circuits - AliExpress
Smart Electronics Esp-12f Wemos D1 Wifi Uno Based Esp8266 Shield For Arduino Compatible Ide - Integrated Circuits - AliExpress
Keyestudio ESP8266 WI-FI Module Shield +1M Micro USB Cable For Arduino (Chip is CP2102-GMR)