Otřesové čidlo a jeho komunikace v konceptu IoT

Abstract

The diploma thesis deals with a design and implementation of a vibration sensor providing the possibility of integration in the Internet of things (IoT) infrastructure. An infrastructure in accordance with the LoRa WAN specification has been created for this integration, which, apart from the sensor, also comprises gate and server with users’ access to the web application. The application enables users to display acquired data as text, or to use a sub-application, and also enables administration of the gate as well as other sensors. The creation of the gate and server are the key points of the present paper, in which MQTT protocol and LoRa technology played a major role. Vibrations are measured using a passive vibration element, with Atmega328 8-bit microprocessor checking its state; data about the state are sent by the RFM96W transmitter to the gate. The sensor is placed on a batery, therefore the design considers minimum electricity consumption. The solution also applies a 3D printer, onto which the box for the vibration sensor is fitted. Currently, the whole infrastructure is being tested on campus, where data is being gathered from several sensors.