How to connect a Raspberry Pi to a serial USB port with Python from the terminal to easily interface with other devices

Raspberry Pi can be used to interface with the real world from its GPIO, for example, by controlling a stepper motor. You can also use Raspberry Pi to dialog with some devices—like Arduino—by using a serial USB port.

Back in my day I remember using Clipper programming language and a book on how to program the HP Laserjet, to resd and write via the parallel port to make a laser printer sing and dance.

See How to connect a Raspberry Pi to a serial USB port with Python from the terminal

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Raspberry Pi can be used to interface with the real world from its GPIO, for example, by controlling a stepper motor. You can also use Raspberry Pi to dialog with some devices—like Arduino—by using a serial USB port. In this guide, I'll show you how to connect your Raspberry Pi to a serial USB port and read its values with Python from the terminal (without a desktop environment). For this purpose, we'll use Pyserial and its terminal tool.

source https://gadgeteer.co.za/how-connect-raspberry-pi-serial-usb-port-python-terminal-easily-interface-other-devices