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tutorials.application-mashup's Introduction

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FIWARE Visualization License: MIT Support badge

This tutorial is an introduction to FIWARE Wirecloud - a generic enabler visualization tool which allows end users without programming skills to create web applications and dashboards to visualize their NGSI data. The tutorial explains how to create a Wirecloud workspace and upload widget to visualise the data. Once the widgets are configured the data is displayed on screen

The tutorial demonstrates examples of interactions using the Wirecloud GUI only. No programming is involved within the tutorial itself, as Wirecloud is designed to be usable by all type of user, even those with limited programming skills. However the commentary continues to reference various programming principles and standard concepts common to all FIWARE architectures.

Start-Up

NGSI-v2 offers JSON based interoperability used in individual Smart Systems. To run this tutorial with NGSI-v2, use the NGSI-v2 branch.

git clone https://github.com/FIWARE/tutorials.Administrating-XACML.git
cd tutorials.Administrating-XACML
git checkout NGSI-v2

./services create
./services start
NGSI v2 πŸ“š Documentation

License

MIT Β© 2019-2024 FIWARE Foundation e.V.

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tutorials.application-mashup's Issues

Subscriptions not working

Hi there,

I am new to the fiware eco-system and in the process of finding my way around.
I followed the Application-Mashup tutorial. Most of it works as described. I used the provided convenience-script to start up all containers and then followed the instructions to create and configure the widgets and operators.

I do get entities displayed, however, there appears to be no interactivity. Whenever I change the state in the device-monitor (switching on a lamp), my wirecloud dashboard does not update. Only when I refresh the browser the changed state can be seen.

I was expecting this to be updating immediately on its own via Context Broker Subscriptions. But it does not.

On the second part of the tutorial, that uses the NGSI-Source operator, I noticed that there is a field for Monitored NGSI Attributes. I suspect this is used to setup subscriptions. Now unfortunately, when I use this and put in an attribute name, I only get an error "Error creating subscription in the context broker server: Connection Error"
image
image

I tried to retrieve logs (via docker logs command), but did not find anything on the cause. All containers a running on my local machine, started with the provided script (that does run docker-compose) and are able to comunicate with each other.

I would appreciate any hints for getting the tutorial running.
Kind regards.

./service start gives the error - ERROR: Pool overlaps with other one on this address space

After following the instructions in README, I was able to create services (after modifications in docker-compose), later when i try to do ./service start. I get the following mesage on console

./services start
Stopping containers
Starting ten containers Orion, IoT-Agent, Keyrock, Wirecloud, Tutorial
Along with the following databases: MongoDB, PostGres and MySQL
and microservices: ElasticSearch, MemCache and NGSI Proxy

  • Orion is the context broker
  • IoT-Agent is configured for the UltraLight Protocol
  • Tutorial acts as a series of dummy IoT Sensors over HTTP
  • Keyrock is an Identity Management Front-End
  • Wirecloud is a Dashboard Utility
  • NGSI Proxy creates a server that is capable of redirecting Orion notifications to web pages

ERROR: Pool overlaps with other one on this address space

However the correct IP pool is given in the docker-compose. Please suggest the required changes.

Thanks and Regards

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