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Wireless Sensor Network
Nosko, Matúš ; Materna, Zdeněk (oponent) ; Zemčík, Pavel (vedoucí práce)
The work was focused on creating a secure sensor network based on mesh topology, built on devices from Espressif. It also concentrates on code security and connecting this network to the cloud. The mesh network created is dynamic, regenerative, and self-organizing. The entire network is built on Wi-Fi, making it easy to connect to the internet, as the only condition for its operation is to have Wi-Fi at the installation site, eliminating the need for any special device to connect the network to the internet - it's gatewayless. Even if one node fails, the network self-organizes according to the newly created conditions and continues to function. The most modern security methods are used to secure the devices, such as secure boot and flash encryption. The MQTT protocol is used to connect the mesh network to the server. The MQTT broker, database, and API interface on the server side are dockerized. Thanks to these docker containers, it is easy to extend server parts. Also, values from devices are stored in a database and displayed on a website. The entire network solution was implemented in the ESP-IDF environment and tested on ESP32-S3 devices.
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