EVALUATING RELIABILITY OF COMMUNICATION IN IOT BASED WATER MONITORING USING ESP32
Keywords:
Internet of Things (IoT) Communication, Latency, Throughput, Packet loss, Message Queuing Telemetry Transport (MQTT) ProtocolAbstract
In IoT-based technology solutions, there exist several tools for establishing connection with sensors and maintaining the flow of data between them. One of the commonly used solutions in IoT systems for sending and receiving data between connected devices is the Message Queuing Telemetry Transport (MQTT). This communication protocol features a lightweight data transfer mechanism and can be used by the devices with low processing power and memory. In this paper, we propose an experimental model of an IoT-built water monitoring network based on ESP32 module to conduct an evaluation of reliability and communication properties of the MQTT communication protocol at different transmission rates. In this system, an ultrasonic sensor is incorporated into the ESP32-based device for collecting information about the level of water and its subsequent transfer via the MQTT communication protocol. The evaluation of the system will be conducted based on several parameters, such as average delay, availability, average throughput, average packet loss ratio (PLR), average packet delivery ratio (PDR), and sensor reliability. Several transmission rates will be considered in order to evaluate their influence on communication process and system reliability. According to the experimental results, higher transmission rates increase throughput, and packet loss ratio but decrease latency, packet delivery, availability, and accuracy of measurements. At the lowest transmission rate, the system achieves 99% availability and maintains packet delivery with low packet loss.
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