prevent crash if master calls a invalid / unknown function

[flottokarotto]

No description provided.

[TooTallNate]

You should probably just add your own error event handler to prevent the uncaught exception from happening.

[flottokarotto]

Hi, it was about May i was working with your stack, so i'dont exactly remember why i did not simply add a exception handler.
But i think there was not enouugh information in the error object, because a correct modbus slave have to inform the master that he does not implement the requestet method.

I'm not a javascript expert, so my sultion is probably not the best one, but i think the stack should not simply crash if a unkown function code was called.

thank you for your nice software, it was very usefull for protoyping. Unfortunately i can't use javascript for my production solution :( .

Kind regards