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using-serial-monitor-to-control-servo-motor-c55083-en.md

Computer Control: Serial Servo Movement

The Serial Monitor isn't just for reading errors; it is a powerful two-way communication tool. By typing commands into your PC, you can make the Arduino execute complex, precise physical actions.

ultrasonic_servo_mount_detail_1772682020744.png

Parsing the Serial Data

When you type the number 90 into the Serial Monitor and press Enter, the Arduino doesn't see a number—it sees the ASCII characters for '9' and '0' and a newline character (\n).

  1. The Check: The code uses if(Serial.available() > 0) to wait for incoming data.
  2. The Extraction: The Serial.parseInt() function is magic—it strips away the text formatting and extracts the actual integer value (90).
  3. The Action: The Arduino limits the value (ensuring it's between 0 and 180) and sends it directly to the servo: myServo.write(angle);.

Required Hardware

  • Arduino Uno/Nano.
  • Micro Servo (SG90 or MG90S).
  • USB Cable: This acts as the communication link.

Beyond the Basics

Once this code works, you no longer need the Arduino Serial Monitor. You can use Python (via the pyserial library) or C# to write custom desktop applications with sliders and buttons that talk directly to your robotic arm!

ข้อมูล Frontmatter ดั้งเดิม 

title: "Using Serial Monitor to Control Servo Motor"
description: "Type to move! Learn how to parse text commands from your computer to precisely control the angle of an Arduino servo motor."
category: "Motors & Robotics"
difficulty: "Intermediate"