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I am writing a software, in Node.JS with Electron, that connects to a non fiscal thermal printer, but I ran into the following problem:
On the client, they use a third-party software that connects directly to a serial port (COM6), where the printer is installed, my problem is that, as direct communication occurs with this port, I can’t get my software to connect with this port, 'cause she’s already busy.
Would you have any solution for this? Any software that does the controller part for this port? Or some way to open multiple connections?