Review on KeeYees ESP8266 ESP-12F NodeMcu Mini WLAN WiFi Development Board 4M Bytes for Arduino – Pack of 5 by Michael Ringgold

At first I couldn't upload anything to these boards using a Linux computer, but when I found a Windows based computer (with the same versions of the Arduino IDE) all these devices were programmed correctly. These boards are for developing Internet of Things (IoT) devices, and there are many guides available online. Their small size makes them ideal for building into small devices, allowing them to communicate via WiFi. Although documentation for them is available online, it would be nice if a short tutorial was included.