Implementación de un prototipo de geolocalización mediante la evaluación de tecnologías de comunicación inalámbrica para el monitoreo de niños en la escuela “José Antonio Lizarzaburu”.

Abstract

In the present Curricular Integration Work, a geolocation prototype was implemented for the monitoring of children in the "José Antonio Lizarzaburu" school using Wi-Fi and Zigbee technology respectively for the connection of the communication nodes. The theoretical investigation and subsequent selection of two wireless technologies was carried out using the Likert technique; As for the design, each of the devices was determined through a systematic comparison, which allowed comparing operating characteristics and cost. The prototype consists of two communication nodes: Tracking Node, which obtains the latitude and longitude values, and Control Node, which is responsible for sending the data to the cloud. Wi-Fi communication is done via the wireless module on the ESP 32 MCU card and for Zigbee communication via the Xbee S2C module. For the visualization of the data obtained, a mobile interface was developed using software as a service (Blynk) that allows observing the position of the child in real time, which was shown to be easy to handle by applying the user experience questionnaire (UEQ). to the teachers of the institution. De las pruebas realizadas al prototipo, se evaluaron los siguientes parámetros: promedio de retardo Wi-Fi: 26,29 [ms] Zigbee: 103,16 [ms], rango de operación Wi-Fi: 130 [m] Zigbee: 100 [m], finalmente el consumo de corriente Wi-Fi: 289 [mA] Zigbee: 159 [mA] con una duración de 6 y 12 horas respectivamente. It was concluded that, in terms of transmission, Wi-Fi technology surpasses Zigbee technology in two of the three parameters evaluated. It is recommended to use low power wide area network (LPWAN) technologies, which allow for greater coverage and thus monitor the movement of children beyond the area of the institution.