ESP8266-based IOT Development Boards
This is not an Arduino, although it sure looks like one ! This is a feature-loaded, turbocharged ESP32 Wifi/Bluetooth Low Energy SoC development board for IoT applications.
SparkFun ESP32 Thing is the updated version of the ESP8266 that supports the Bluetooth low energy(BLE) that enables your IOT projects.
The Wio Core is a wifi module with an embedded ESP8266,developed from the ESP-WROOM-O2 for all IoT appllications.
Wio Node is an ESP8266 module for any IOT platform that is small and compact but very effective.
SparkFun Blynk Board - ESP8266 is a light weight,interactive board monitored by a Blynk App.
Protocentral ESP8266 Wifi shield is the most suitable Wifi module for your Arduino.
The SparkFun ESP8266 Thing is a combination of Wifi and the ESP8266 which has Iot applications.
ESP8266 WiFi Module acts an interface between the microcontroller board and your Wifi network.