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  • You probably do not want to disable the line ending transmission; rather you likely want to read until a line ending (and then exclude it) rather than until a timeout. The Arduino serial monitor is a bit odd as a client in encouraging you to tap an on-screen button to send, more typically it's pressing return than triggers transmission, or else if characters are sent as typed, makes the recipient act on them. Commented Jan 4, 2018 at 22:37
  • Thank you for that info Chris. I will look into that. For now, I'm going to use the serial monitor to simulate the input and effects on my code, since my final goal is to setup the Arduino to read external analog signals, but since I'm quite new to this type of programming, I'm trying to understand what I can or can't do. I've been using Arduino for some years, but mostly with pre-assembled sensor boards and copy pasting code. Commented Jan 5, 2018 at 7:41