To get an understanding of what the IoT Kit is, or isn’t, have a look at the picture below.
It show’s 3 workplaces with IoT Devices. These are connected via WiFi to a private cloud. This private cloud could be running on a cluster of Raspberry Pi’s. It’s not difficult to build a ‘Docker swarm’ on a cluster of Raspberry Pi’s which run a variety of services, such as a MQTT broker, Grafana for dashboards, etc.
The second image show more details of the components on the workplace. Each Wemos D1 mini controller can be equipped with a variety of shields which allows for flexibility when developing solutions. For each shield there is a matching firmware that remotely can be installed. This allows for a lot of different scenarios with a limited number of controllers.
The Raspberry Pi has a shield that has the sensors and actuators needed to get the ‘real’ IoT experience and can be used standalone, without the Wemos D1 mini controllers.