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Question How To Deal With Real Time System?

Hello good guys,

Is it using a timer is the only way to deal with real time system?

Example is:
When I am on my unit and another user add a data on a different unit, It will appear immediately on my screen that there is a new record added.

Any reply would be so much appreciated.
Depends on your system and architecture.

For example:-

With a web front end, on update of the database you could call a node.js server that will emit refreshed data to your clients via web sockets.


17+ years progress programming and still learning.
I have started to write an HTTP WebSocker ABL client library which will publish and subscribe to a node.js. The project was never completed as I started to look at using MQTT as a lightweight messaging service. The reason was so I could publish real-time information to an Arduino device with an LCD display