Hello Felipe -
The GeoEvent Extension does not provide an outbound connector specifically for the Whatsapp instant messaging application. It appears that Whatsapp is an XMPP based application and GeoEvent does include an XMPP adapter. You will probably find that you have to configure a custom connector using the out-of-the-box MessageFormatter adapter and XMPP transport however to get GeoEvent notifications to work with your Whatsapp application.
In GeoEvent Manager, navigate to Site > GeoEvent > Connectors and look for the Send an Instant Message outbound connector (one of the connnectors available out-of-the-box). You can edit this connector to review its configuration and use that as a sample for configuring your own custom outbound connector.
There is a section in the Notifications Tutorial which discusses how the Send an Instant Message connector is used. The exercises uses the Openfire / Spark XMPP client/server from igniterealtime.org. Installing these might help you figure out how Whatsapp needs to be configured to work with the custom XMPP outbound connector you configure for GeoEvent.
Hope this information is helpful -
RJ
