Hover over the signal: Emergency wi-fi signal transmitter and repeater with messaging application

Abstract

The focus of this research was to design, construct, and test an emergency Wi-Fi signal transmitter and repeater with a messaging app. Two NodeMCU Microcontrollers with ESP8266 Wi-Fi modules and two drones make up the system. The Wi-Fi module units on the microcontroller will be the source of Wi-Fi networks identified by smart devices. The two drones in flight, which have an average flight period of 5 to 10 minutes, are attached to and are carrying these microcontrollers. Drones equipped with microcontrollers were used to expand each microcontroller's range of communication. The main source code or program is on one microcontroller, while the repeater is on the other. All devices must connect to the Wi-Fi signal either from the repeater or the main program. If connected, the users can communicate using the developed messaging application. In the developed messaging application, the users are required to put a name or alias that they can change anytime. A function was also added to delete or clear past messages. The overall system exhibited normal operations and the data gathered conformed to the functionality, where the transmitter, repeater, and messaging application operated their functions properly. Based on the results of the reliability test, the range of the distance from the user to the microcontroller is 30 meters. The farther the distance of the user to the microcontroller, the slower the message is sent to the receiving device. Overall, the system has met the requirements for reliability and functionality.