Technical FAQ

In which platforms has been Sentilo tested ?

The first deployment for the Barcelona City Council has been tested in the following infraestructure:

  • Four virtual machines, two for the front-ends and another two for the back-end
  • All of them use as operating system Ubuntu server LTS 12.04
  • The real time database server(Redis) works with 16 GB of memory and 36 GB of hard disk
  • The other three servers works with 4 GB of memory and 16 GB of hard disk

Another deployment configuration should work properly, always keeping in mind the expected load by the system.
There also a virtual machine ready for use that can be used for testing purposes.

I successfully published an observation, but I cannot see the data in catalog.

Check that the Catalog and Sentilo API Server are in the same timezone, for example in UTC.
Make sure the sentilo-server script has the following VM option: 


Also, make sure that the Tomcat that hosts the Catalog application has the same option, for example en $JAVA_OPTS variable.

Maps is not showing up in Catalog application

Recently Google changed it policy regarding Maps key. Please go to and create one.

If you are using the last release of Sentilo(1.6) you can define the API key inside the configuration file:

# Google API key to use Google Maps
google.api.key=<your key> 

I created a provider and immediately after that, an observation using the new provider's token is rejected with 401 "Invalid credential"

The providers are activated in a background job that runs every 5 minutes. Please wait a moment :-)

The command mvn package appassembler:assemble fails.

You have to execute the command in the directory of the component you want to install.

I think I installed Sentilo. How can I confirm all is up & running?.

You can use this script:


You also might want to check Platform Testing

If you installed everything on your local machine, you can access the catalog at http://localhost:8080/sentilo-catalog-web and the REST API at http://localhost:8081

Last modified by Administrator on 2018/01/05 16:27