What's the dollarWaitTimeMilliseconds for?

[MichielT]

New to openpnp having purchased an afarco 3.2 (nice machine btw). Had issues with serial ports not working in openpnp but working fine in Linux mint and other java programs. Used a java project of mine to workaround it so that really narrowed it down to openpnp.

Decided it would be a fun experiment/fork to try to replace  the comms in general and attempt my own version of async. So far so good.

But one thing I'm not sure about (probably will discover more along the way), what is that dollarwaittime for? I've implemented it as a general 'just wait a bit', but I rather know the  reason.