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How To Connect MBot To Scratch?

Published Aug 29, 2025 4 min read
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Connecting Your mBot to Scratch: A Comprehensive Guide

Connecting your mBot robot to Scratch allows you to program it using a visual, block-based programming language, making it accessible for beginners and engaging for all ages. Here's a detailed guide on how to connect your mBot to Scratch, ensuring you get up and running smoothly:

1. Software Prerequisites

  • mBlock: mBlock is a customized version of Scratch specifically designed for programming Makeblock robots like mBot. Download and install mBlock from the official Makeblock website.
  • Scratch 3.0 (optional): If you prefer working directly with Scratch 3.0, you'll need the Makeblock Link extension, which facilitates communication between Scratch and your robot. You can download and install it from the Makeblock website.

2. Connecting via USB

  • Connect your mBot to your computer: Use the USB cable provided with your mBot and connect it to a USB port on your computer.
  • Power on your mBot: Ensure the robot is powered on using the power switch on the mCore board.
  • Launch mBlock: Open the mBlock software you installed earlier.
  • Add the mBot device: In mBlock, click on the "+ Add" button in the Devices tab. Select "mBot" from the device library and click OK.
  • Connect to the serial port: Go to the "Connect" menu in mBlock and select "Serial Port". If you are unsure of the port, disconnect the mBot and check which port disappears. Select the correct port and click "Connect".
  • mBlock will indicate successful connection: Once connected, the title bar in mBlock will indicate a successful connection, and the red dot in the "Robots" Scripts area will turn green.

3. Connecting via Bluetooth

  • Install Makeblock Bluetooth Dongle: If you are using Bluetooth, you'll need to install the Makeblock Bluetooth Dongle and plug it into a USB port on your computer.
  • Enable Bluetooth: Turn on Bluetooth on your computer and ensure your mBot is powered on.
  • Pair with the mBot: Press the Bluetooth symbol on the dongle to pair with your mBot. The LED indicator on the dongle will flash quickly and then become solid when pairing is complete.
  • Connect in mBlock: Open mBlock and follow the steps in the USB connection section above to add the mBot device. Select "Bluetooth" in the "Connect" menu and choose the mBot from the list of available Bluetooth devices.

4. Connecting via 2.4G Module (if available)

  • Insert the 2.4G Module and Adapter: Insert the 2.4G module into your mBot's mCore and the adapter into a USB port on your computer.
  • Power on your mBot: Ensure the robot is powered on using the power switch on the mCore board.
  • Connect in mBlock: Open mBlock and follow the steps in the USB connection section above to add the mBot device. Select "2.4G Serial" in the "Connect" menu and click "Connect".

5. Setting the Programming Mode

  • Live Mode: For interactive programming, select "Live" mode in mBlock. This mode allows you to see the effects of your code in real-time as the program is executed on the robot. However, the program will stop running if the connection is lost.
  • Upload Mode: To create programs that run independently on the mBot, select "Upload" mode. This mode uploads the code to the robot's memory, allowing it to run even when disconnected from the computer.

6. Programming in Scratch

  • Explore mBlock blocks: mBlock offers a wide range of blocks specifically designed for controlling your mBot, including movement, sensor readings, and LED control.
  • Start coding: Drag and drop blocks to create your programs, and click the green flag to run them.
  • Example programs: mBlock often provides example programs to get you started and help you learn the basics of programming your mBot.

Troubleshooting

  • Connection issues: Double-check the USB cable, ensure the robot is powered on, and try different USB ports.
  • Driver problems: If mBlock has trouble identifying the COM port, consult the Makeblock Help Center for troubleshooting steps.
  • Firmware issues: If the Bluetooth connection fails, you may need to update the mBot's firmware as described in the Makeblock Help Center.

Important Notes

  • When using Bluetooth, you cannot upload programs to the mBot (Arduino Mode), reset the default program, or connect the mBot to another device via Bluetooth simultaneously.
  • To upgrade the firmware or reset the default program, you must be connected via USB.

By following these steps, you can successfully connect your mBot to Scratch and embark on a journey of fun and engaging robotics programming!

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