Wi-Fi R3 ATmega328P + ESP8266 (32Mb memory) USB-TTL CH340G For Arduino UNO NodeMCU - Mikroelectron MikroElectron is an online electronics store in Amman
UNO R3 + WIFI ESP8266 + CH340G Arduino and WIFI - a Versatile Development Board : 6 Steps - Instructables
Programming Arduino UNO clone with built-in WiFi module UNO R3 + WiFi ATmega328P+ESP8266 | by Andrey Semenyuk | Dev Genius