Adding voice messages to a low-cost long-range data messaging system

Abstract

[EN] Remote locations in rural areas can benefit from any system that would provide some form of connectivity. In a previous work we described a low cost architecture that, thanks to the use of the LoRa technology, allowed long links using low energy and a cheap infrastructure. In this work we extend those results by adding the possibility to include generic external sources of data using an MQTT based interface. More specifically, we describe a voice messaging system that allows users that cannot read or write to send voice based messages. We describe how the system was integrated into the existing platform and present so me performance results. We consider that these results are promising and provide a tool that can offer a useful service at a low cost.