DD-Link is a startup that deals with various types of projects in the field of the Internet of Things (IoT). We cover a wide range of services, starting from the creation of simple electronic devices for reading various parameters with advanced electronic sensors, to even managing industrial machines. Additionally, we specialize in the implementation of communication protocols such as MQTT and WebSocket, the installation of VPS servers, databases, as well as security solutions in the field of cryptography to protect data in communication. We offer the development of control panels on the web and mobile applications for monitoring and managing devices, as well as solutions for home automation and alarm systems for homes and cars, ensuring reliable and efficient systems for our users.