|WeMos D1 R2 Arduino-compatible ARM processor board with WiFi|
A WeMos D1 R2 board with ESP8266 chipset that incorporates WiFi. Can be programmed using the Arduino IDE but you have to install additional files.
See the article on ESP8266 and ThingSpeak.com in the September 2017 issue for more details.
This version has a connector for an external antenna.