Arduino Tutorial 18: Reading Numbers from the Serial Monitor

Using Arduino's Serial Monitor & Plotter (ESP32 + Arduino series)

ESP32 Tutorial - How to use Serial Monitor ( NEW Arduino IDE )

Arduino Tutorial : Using the serial monitor

Arduino Workshop - Chapter Two - Using Serial Monitor

Debug Your Programs with the Serial Monitor - Arduino Tutorial for Beginners 5

Arduino Tutorial #4: Serial Communication

Tutorial 06 for Arduino: Serial Communication and Processing

Serial Communication with Arduino - The details!