Hardware Implementation of Fishermen Radio for Data Communication via Audio Signal on Very High Frequency (VHF) Spectrum

This fisherman’s radio offers a radio communication tool for fishermen’s safety at an affordable price and adapts to maritime frequencies on the very high frequency (VHF) spectrum, especially in Indonesia. At the transmitter, the input is in the form of a location point from the GPS in the form of longitude and latitude. This location point will be converted into a voice signal based on Morse code with Arduino Nano. An audio signal with a frequency of 156.5 MHz is transmitted using the DRA818V transceiver module. The receiver will receive this audio signal and then retranslate it into the initial GPS location point again using the Goertzel algorithm. The decoded results then become data to be integrated with the dashboard database on the Radio Nelayan website.