Dixys Leonardo Hernandez Rojas | UNIVERSIDAD TECNICA DE MACHALA (original) (raw)

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Papers by Dixys Leonardo Hernandez Rojas

Research paper thumbnail of IoT Android Gateway for Monitoring and Control a WSN

Precision agriculture and the automation of agricultural processes such as irrigation with the us... more Precision agriculture and the automation of agricultural processes such as irrigation with the use of current technologies, create the need to develop IoT gateways for WSN with Bluetooth Low Energy motes that demonstrate their functionality through a testbed. The challenge of developing both the testbed and an application for Android smart phones with gateway functionalities to package the sensor data into MQTT messages and send it to remote server or cloud computing and, in turn, be a tool for monitoring on-site of sensors and controlling the actuators present in the mote motivated the development of this work. We carried out tests on the proposed testbed, which denotes its functionality, and shows there is a fast and stable IoT gateway with low CPU and RAM usage, ready for IoT applications such as Precision Agriculture. The application design is extensible to other OS for smart phones and tablets.

Research paper thumbnail of Monitoreo inalámbrico de señales eléctricas de voltaje 110/220V a través de Arduino

Alternativas

Las constantes variaciones de voltaje en los sistemas eléctricos, pueden provocar pérdidas económ... more Las constantes variaciones de voltaje en los sistemas eléctricos, pueden provocar pérdidas económicas o de rendimiento, así como también, daños físicos en los equipos eléctricos y electrónicos. En el presente trabajo se presenta el diseño e implementación de un prototipo basado en Arduino Uno y Wifi Shield que permitió monitorear inalámbricamente las señales eléctricas de voltaje 110/220 voltios (V), con el empleo de componentes tales como: transformadores reductores de voltaje y acondicionador de señal compuesto por un circuito divisor de voltaje y un circuito offset. Para la visualización de las señales adquiridas a través del uso de la plataforma de hardware libre Arduino, se desarrolló una aplicación móvil empleando el entorno de desarrollo Android Studio con lenguaje de programación Java, utilizado para graficar la forma de onda de las señales eléctricas en tiempo real, así como también para presentar el voltaje eficaz y voltaje pico-pico mediante una red inalámbrica wifi.

Research paper thumbnail of Rules engine and complex event processor in the context of internet of things for precision agriculture

Computers and Electronics in Agriculture

Research paper thumbnail of Design and Practical Evaluation of a Family of Lightweight Protocols for Heterogeneous Sensing through BLE Beacons in IoT Telemetry Applications

Sensors (Basel, Switzerland), Jan 27, 2017

The Internet of Things (IoT) involves a wide variety of heterogeneous technologies and resource-c... more The Internet of Things (IoT) involves a wide variety of heterogeneous technologies and resource-constrained devices that interact with each other. Due to such constraints, IoT devices usually require lightweight protocols that optimize the use of resources and energy consumption. Among the different commercial IoT devices, Bluetooth and Bluetooth Low Energy (BLE)-based beacons, which broadcast periodically certain data packets to notify their presence, have experienced a remarkable growth, specially due to their application in indoor positioning systems. This article proposes a family of protocols named Lightweight Protocol for Sensors (LP4S) that provides fast responses and enables plug-and-play mechanisms that allow IoT telemetry systems to discover new nodes and to describe and auto-register the sensors and actuators connected to a beacon. Thus, three protocols are defined depending on the beacon hardware characteristics: LP4S-6 (for resource-constraint beacons), LP4S-X (for more...

Research paper thumbnail of Design and Practical Evaluation of a Family of Lightweight Protocols for Heterogeneous Sensing through BLE Beacons in IoT Telemetry Applications

The Internet of Things (IoT) involves a wide variety of heterogeneous technologies and resource-c... more The Internet of Things (IoT) involves a wide variety of heterogeneous technologies and resource-constrained devices that interact with each other. Due to such constraints, IoT devices usually require lightweight protocols that optimize the use of resources and energy consumption. Among the different commercial IoT devices, Bluetooth and Bluetooth Low Energy (BLE)-based beacons, which broadcast periodically certain data packets to notify their presence, have experienced a remarkable growth, specially due to their application in indoor positioning systems. This article proposes a family of protocols named Lightweight Protocol for Sensors (LP4S) that provides fast responses and enables plug-and-play mechanisms that allow IoT telemetry systems to discover new nodes and to describe and auto-register the sensors and actuators connected to a beacon. Thus, three protocols are defined depending on the beacon hardware characteristics: LP4S-6 (for resource-constraint beacons), LP4S-X (for more powerful beacons) and LP4S-J (for beacons able to run complex firmware). In order to demonstrate the capabilities of the designed protocols, the most restrictive (LP4S-6) is tested after implementing it for a telemetry application in a beacon based on Eddystone (Google's open beacon format). Thus, the beacon specification is extended in order to increase its ability to manage unlimited sensors in a telemetry system without interfering in its normal operation with Eddystone frames. The performed experiments show the feasibility of the proposed solution and its superiority, in terms of latency and energy consumption, with respect to approaches based on Generic Attribute Profile (GATT) when multiple users connect to a mote or in scenarios where latency is not a restriction, but where low-energy consumption is essential.

Research paper thumbnail of IoT Android Gateway for Monitoring and Control a WSN

Precision agriculture and the automation of agricultural processes such as irrigation with the us... more Precision agriculture and the automation of agricultural processes such as irrigation with the use of current technologies, create the need to develop IoT gateways for WSN with Bluetooth Low Energy motes that demonstrate their functionality through a testbed. The challenge of developing both the testbed and an application for Android smart phones with gateway functionalities to package the sensor data into MQTT messages and send it to remote server or cloud computing and, in turn, be a tool for monitoring on-site of sensors and controlling the actuators present in the mote motivated the development of this work. We carried out tests on the proposed testbed, which denotes its functionality, and shows there is a fast and stable IoT gateway with low CPU and RAM usage, ready for IoT applications such as Precision Agriculture. The application design is extensible to other OS for smart phones and tablets.

Research paper thumbnail of Monitoreo inalámbrico de señales eléctricas de voltaje 110/220V a través de Arduino

Alternativas

Las constantes variaciones de voltaje en los sistemas eléctricos, pueden provocar pérdidas económ... more Las constantes variaciones de voltaje en los sistemas eléctricos, pueden provocar pérdidas económicas o de rendimiento, así como también, daños físicos en los equipos eléctricos y electrónicos. En el presente trabajo se presenta el diseño e implementación de un prototipo basado en Arduino Uno y Wifi Shield que permitió monitorear inalámbricamente las señales eléctricas de voltaje 110/220 voltios (V), con el empleo de componentes tales como: transformadores reductores de voltaje y acondicionador de señal compuesto por un circuito divisor de voltaje y un circuito offset. Para la visualización de las señales adquiridas a través del uso de la plataforma de hardware libre Arduino, se desarrolló una aplicación móvil empleando el entorno de desarrollo Android Studio con lenguaje de programación Java, utilizado para graficar la forma de onda de las señales eléctricas en tiempo real, así como también para presentar el voltaje eficaz y voltaje pico-pico mediante una red inalámbrica wifi.

Research paper thumbnail of Rules engine and complex event processor in the context of internet of things for precision agriculture

Computers and Electronics in Agriculture

Research paper thumbnail of Design and Practical Evaluation of a Family of Lightweight Protocols for Heterogeneous Sensing through BLE Beacons in IoT Telemetry Applications

Sensors (Basel, Switzerland), Jan 27, 2017

The Internet of Things (IoT) involves a wide variety of heterogeneous technologies and resource-c... more The Internet of Things (IoT) involves a wide variety of heterogeneous technologies and resource-constrained devices that interact with each other. Due to such constraints, IoT devices usually require lightweight protocols that optimize the use of resources and energy consumption. Among the different commercial IoT devices, Bluetooth and Bluetooth Low Energy (BLE)-based beacons, which broadcast periodically certain data packets to notify their presence, have experienced a remarkable growth, specially due to their application in indoor positioning systems. This article proposes a family of protocols named Lightweight Protocol for Sensors (LP4S) that provides fast responses and enables plug-and-play mechanisms that allow IoT telemetry systems to discover new nodes and to describe and auto-register the sensors and actuators connected to a beacon. Thus, three protocols are defined depending on the beacon hardware characteristics: LP4S-6 (for resource-constraint beacons), LP4S-X (for more...

Research paper thumbnail of Design and Practical Evaluation of a Family of Lightweight Protocols for Heterogeneous Sensing through BLE Beacons in IoT Telemetry Applications

The Internet of Things (IoT) involves a wide variety of heterogeneous technologies and resource-c... more The Internet of Things (IoT) involves a wide variety of heterogeneous technologies and resource-constrained devices that interact with each other. Due to such constraints, IoT devices usually require lightweight protocols that optimize the use of resources and energy consumption. Among the different commercial IoT devices, Bluetooth and Bluetooth Low Energy (BLE)-based beacons, which broadcast periodically certain data packets to notify their presence, have experienced a remarkable growth, specially due to their application in indoor positioning systems. This article proposes a family of protocols named Lightweight Protocol for Sensors (LP4S) that provides fast responses and enables plug-and-play mechanisms that allow IoT telemetry systems to discover new nodes and to describe and auto-register the sensors and actuators connected to a beacon. Thus, three protocols are defined depending on the beacon hardware characteristics: LP4S-6 (for resource-constraint beacons), LP4S-X (for more powerful beacons) and LP4S-J (for beacons able to run complex firmware). In order to demonstrate the capabilities of the designed protocols, the most restrictive (LP4S-6) is tested after implementing it for a telemetry application in a beacon based on Eddystone (Google's open beacon format). Thus, the beacon specification is extended in order to increase its ability to manage unlimited sensors in a telemetry system without interfering in its normal operation with Eddystone frames. The performed experiments show the feasibility of the proposed solution and its superiority, in terms of latency and energy consumption, with respect to approaches based on Generic Attribute Profile (GATT) when multiple users connect to a mote or in scenarios where latency is not a restriction, but where low-energy consumption is essential.