Showing posts from January, 2017

Develop an "AgriNode bundle " for Eclipse Kura (using Bitreactive)

In my previous post:  MOSQUITTO (MQTT BROKER) DEMO. (MQTT broker is installed into a Gateway with host IP: In this demo, I build a bundle which is installed in Kura
For my project, the bundle purpose is to send an MQTT message from the Gateway to sensor nodes every specific time which can be set by a user via Kura UI. This means that the gateway will send a command for requiring data from sensor nodes. Therefore, sensor nodes need to subscribe the topic that the gateway publishes to. The figure below illustrates this demo:

In the figure, the "Gateway" is a Raspberry Pi 2. The "sensor node" will be Arduino ESP8266 but in this demo, I use an Android phone for monitoring message from the gateway.
If you are interested in this demo please follow these steps: Requirements:  - Raspberry Pi 2 with Kura and Mosquitto installed. - Eclipse Java Neon with Bitreactive installed.
Step 1: Build a bundle Please follow this tutorial for setting up Eclipse deve…

MQTT demo

Mosquitto (MQTT broker) Demo

MQTT stands for MessageQueuing Telemetry Transport which is an ISO standard (ISO/IEC PRF 20922)publish-subscribe-based "lightweight" messaging protocol for use on top of the TCP/IP protocol. It is designed for connections to remote locations where a "small code footprint" is required or the network bandwidth is limited. The publish-subscribe messaging pattern requires a message broker. The broker is responsible for distributing messages to interested clients based on the topic of a message. Andy Stanford-Clark and Arlen Nipper of Cirrus Link Solutions authored the first version of the protocol in 1999 [1].  In this demo, I work on Mosquitto platform (An Open source MQTT v3.1/v3.1.1 Broker) The picture shows the basic MQTT protocol. MQTT broker - Mosquitto is installed into a PC (Windows, Linux, Raspbian,...). The clients - Publisher/Subscriber connect to MQTT broker via WiFi which is established by the PC. The Subscriber is an Arduino bo…