What I've tried so far is to close the socket and open a new one every 15 seconds. Is that reliable?
Trying to keep a connection with a bluetooth printer
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In what way does closing a socket constitute keeping it alive? – user207421 Jul 16 '18 at 10:27
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@EJP that's a good point, I've edited the title. – JaviOverflow Jul 16 '18 at 10:36