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I prepare to develop one heartbeat program, which need to send udp packet every 5s.
How to sleep 5s in erlang or is there sleep(5) function to be used?
How to make it run in background?
If you want your application to send a udp packet I would recommend you to start with a gen_server(coz. you will obviously be having need to add other functionalities to your application).
1. For sending packets at regular interval.
This will call “handle_call(interval,State)” callback of gen_server every 5 seconds from where you can send your packets
2. Making it run in background.
As already posted use “run_erl”. I have used this myself to run my application successfully as a daemon.
This will create two pipes “erlang.pipe.1.r” and “erlang.pipe.1.w” under “/tmp” dir of unix and you can write commands to write pipe for starting your application using perl or any scripting lang or even c/c++ 🙂