Detecting when a sensor is not sending data to Orion CB in FiWARE

Question

I'm wondering if there is any way of detecting that a specific sensor, in a specific path, has stopped sending data to the Orion Context Broker. Then, if that happens, be able to execute some kind of alarm. I've been studying FiWARE for some months now, but I really don't know a GE that is able to do this.

Does anybody know how can I solve this problem? Thanks.

Answer 1

Orion in itself has no such mechanism implemented. However, it would be fairly easy to implement an application (a context consumer) doing what you are asking for. That application would subscribe to the updates of the sensor and keep a timestamp, updated in each incoming notification, and also, of course, check for how long time has elapsed since the last (latest) notification and if that time is greater than some threshold, issue some kind of warning/alarm