IOT System With Node MCU and Arduino Uno
The Internet of Things (IoT) describes the network of physical objects—“things”—that are embedded with sensors, software, and other technologies for the purpose of connecting and exchanging data with other devices and systems over the internet.
Ref: What Is the Internet of Things (IoT) - Oracle
There is an IoT device, Mobile application and Web application. All those products give a complete IoT System which has following facilities.
Live database update
Live update Mobile application and Web application
-The mobile device can control IoT device through the Internet
There is a LED display to display data which gathered from the sensor.