LEGO MINDSTORMS Education EV3 MicroPython Bedienungsanleitung

Getting started with

LEGO®

MINDSTORMS®

Education EV3

MicroPython

Version 2.0.0

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

TABLE OF CONTENTS

Installation

......................................................................................................................................................................................................................

Creating and Running Programs.............................................................................................................................................

Getting started with LEGO®MINDSTORMS®Education EV3 MicroPython Version 2.0.0

This guide provides instructions on how to start writing MicroPython programs for your LEGO®MINDSTORMS®EV3

robot. The guide will outline a two step process:

• Installation: Where you will prepare your computer and your EV3 Brick by collecting and installing the

required tools. In addition, you will learn how to turn the EV3 Brick on and oﬀ and to navigate the EV3 screen

menus.

• Creating and running programs: Where you will learn how to create a program and download it to the

EV3Brick. You will also learn how to start that program from your computer or from the EV3 Brick.

After you have run your ﬁrst MicroPython program, you will be ready to try out other example programs and

then start writing your own programs in MicroPython.

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

CHAPTER

ONE

INSTALLATION

This section will guide you through the steps required to download and install the necessary software you

will need to start programming.

1.1 What do you need?

To get started, you will need:

• A Windows 10 or Mac OS computer

• Internet access and administrator access

This is required during the installation only. You will not need special access to write and run

programs after installation.

• A microSD card

You will need a card with a minimum capacity of 4GB and a maximum capacity of 32GB.

Thistype of microSD card is also known as microSDHC. A Performance Class A1 microSD card

is recommended.

• A microSD card slot or card reader in your computer

If your computer does not have a (micro) SD card slot, you can use an external USB (micro)

SDcard reader.

• A mini-USB cable, like the one included with your EV3 set

The typical conﬁguration of this equipment is summarised in Figure 1.1.

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

Getting started with LEGO®MINDSTORMS®Education EV3 MicroPython Version 2.0.0

1.2 Preparing your computer

You will write your MicroPython programs using Visual Studio Code. Follow the steps below to download,

install, and conﬁgure this application:

1. Download Visual Studio Code.

2. Follow the on-screen instructions to install the application.

3. Launch Visual Studio Code.

4. Open the extensions tab.

5. Install the EV3 MicroPython extension as shown in Figure 1.2.

Figure 1.1: Setup overview

Mini-USB cable

EV3 Brick

MicroSD card with

EV3 MicroPython image Computer with

Visual Studio Code

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

Getting started with LEGO®MINDSTORMS®Education EV3 MicroPython Version 2.0.0

1.3 Preparing the microSD card

To run MicroPython programs on your EV3 Brick, you will need to install the MicroPython operating system on

your microSD card.

If the microSD card contains ﬁles which you want to keep, make sure you have created a backup of the

contents ﬁrst. See’Managing ﬁles on the EV3 Brick’ to backup your previous MicroPython programs if

necessary.

This process erases everything on your microSD card, including any previous MicroPython programs on it.

To install the MicroPython operating system on your microSD card:

1. Download the EV3 MicroPython microSD card image and save it in a convenient location. This ﬁle is

approximately 360 MB. You do not need to unzip the ﬁle.

2. Download and install a microSD card ﬂashing tool such as Etcher.

3. Insert the microSD card into your computer or card reader.

4. Launch the ﬂashing tool and follow the steps on your screen to install the ﬁle you have just

downloaded. If you use Etcher, you can follow the instructions below, as shown in Figure 1.3.

a. Select the EV3 MicroPython microSD card image ﬁle you have just downloaded.

b. Select your microSD card. Make sure that the device and size correspond to your microSD card.

c. Start the ﬂashing process. This may take several minutes. Do not remove the card until the

`ﬂashing’ process is complete.

Figure 1.2: Installing the extension from the Visual Studio Code marketplace

Open extensions tab

Install

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

Getting started with LEGO®MINDSTORMS®Education EV3 MicroPython Version 2.0.0

1.4 Updating the microSD card

To update the microSD card, download a new image ﬁle using the link above and then ﬂash it to the microSD

card as described above. Be sure to back up any MicroPython programs you want to save.

You do not need to erase the contents of the microSD card ﬁrst. This is done automatically when you ﬂash the

new image ﬁle.

1.5 Using the EV3 Brick

Make sure the EV3 Brick is turned oﬀ. Insert the microSD card you prepared into the microSD card slot on the

EV3 Brick, as shown in Figure 1.4.

Figure 1.3: Using Etcher to ﬂash the EV3 MicroPython microSD card image

Select image Select drive Flash!

abc

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

Getting started with LEGO®MINDSTORMS®Education EV3 MicroPython Version 2.0.0

1.5.1 Turning the EV3 Brick on and oﬀ

Turn on the EV3 Brick by pressing the dark grey centre button.

The booting process may take several minutes. While booting, the EV3 Brick Status Light will turn orange and

blinks intermittently. There will be text on the EV3 Display. The EV3 Brick is ready for use when the Status Light

turns green.

To turn the EV3 Brick oﬀ, open the shutdown menu with the back button, and then select Power Oﬀ using the

centre button, as shown in Figure 1.5.

Figure 1.4: Inserting the ﬂashed microSD card into the EV3 Brick

Figure 1.5: Turning the EV3 Brick oﬀ

First, turn oﬀ

the EV3 Brick

Add a piece of

tape for easy

removal of

the card. Place the card

in the SD slot,

text side up

Main menu

Press back button

Power Oﬀ

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

Getting started with LEGO®MINDSTORMS®Education EV3 MicroPython Version 2.0.0

1.5.2 Viewing motor and sensor values

When you are not running a program, you can view the motor and sensor values using the device browser,

asshown in Figure 1.6.

1.5.3 Going back to the original ﬁrmware

You can go back to the LEGO®ﬁrmware and your LEGO programs at any time. To do so:

1. Turn the EV3 Brick oﬀ as shown above.

2. Wait for the Display and brick Status Light to turn oﬀ.

3. Remove the microSD card.

4. Turn the EV3 on.

Figure 1.6: Viewing motor and sensor values

Open devices Choose device type Watch values

123

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

CREATING AND RUNNING PROGRAMS

CHAPTER

TWO

Now that you have set up your computer and EV3 Brick, you are ready to start writing programs.

To make it easier to create and manage your programs, this chapter will outline how MicroPython projects and

programs are organised.

Programs are organised into project folders, as shown in Figure 2.1. A project folder is a directory on your

computer that contains the main program (main.py) and other optional scripts or ﬁles. The project folder and

its contents will be copied to the EV3 Brick, where the main program will be run.

This section outlines how to create a project and how to transfer it to the EV3 Brick.

Figure 2.1: A project contains a program called main.py and optional resources like sounds or MicroPython modules.

2.1 Creating a new project

To create a new project, open the EV3 MicroPython tab and click create a new project, as shown in Figure 2.2.

Enter a project name in the text ﬁeld that appears and press Enter. When prompted, choose a location for this

program and conﬁrm by clicking choose folder.

LEGO, the LEGO logo and MINDSTORMS are trademarks of the LEGO Group.

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