Program Arduino Mobile Robot Using mBlock | 3 Line Follow

OVERVIEW

PikaBot is a mobile robot kit based on Maker UNO (Arduino UNO compatible). It allows users to learn electronics, sensors, microcontrollers, and coding while having fun. It also comes with a comprehensively designed box that can be used as the mobile robot base and cover!

mBlock is a programming software tool developed based on Scratch 3.0 and Arduino code. It allows kids to learn programming using block-based programming language.

I had created an extension for PikaBot in mBlock to let users without electronics or programming knowledge to start coding and learn robotics in a fun and easy way.

This is the third lesson (linefollow) for this series. Check out the other lessons in the links below:

• Program Arduino Mobile Robot Using mBlock | 1 Move Around
• Program Arduino Mobile Robot Using mBlock | 2 Detect Object

SOFTWARE SETUP

ONLINE VERSION

Step 1: Go to mBlock web code editor

Go to mBlock web code editor at: https://ide.mblock.cc/

Step 2: Add PikaBot device

Click on device in left panel

Click on the add button and choose PikaBot extension

OFFLINE VERSION

Step 1: Download and install mBlock5

Download mBlock5 software at: https://www.mblock.cc/en-us/download/

Click on the downloaded file to install mBlock5 software

Step 2: Add PikaBot device extension

Click on device in left panel

Click on the add button and choose PikaBot extension

DETECT OBSTACLE

CODING

Drag and drop when pikabot starts up block from Events category.

Intialtize the motors by drag initialize left motor... block from Motor category and drop it under when pikabot starts up block. Click hereto learn how to use Motors for PikaBot.

Initialize the line sensors by drag initialize line sensor:.. block from Sensors category and drop it under initialize left motor...

Default line sensor pins for PikaBot is:

• Left IR - A0
• Right IR - A1

Change the pin values if you are NOT using default pins as mention in PikaBot manual.

Drag forever,if and if else block from Control category and drop as shown below.

Drag ' ' and ' ' block from Operator category and drop it in first if else block.

Drag not ' ' block from Operator category and drop it in ' ' and ' ' block.

Drag left IR detects dark block from Sensors category and drop it in not ' ' and if else block. Change left IR detects dark to right IR detects dark using the dropdown on the block.

Drag move forward, turn left and turn right blocks from Motor category and drop it as below.

UPLOAD

Connect USB cable from your PC to PikaBot. Make sure it is in 'Upload' mode and click on the 'Connect' button on bottom left in mBlock.

Then choose the correct COM port for your device, and click connect.

TESTING

MORE PROGRAMMING

This program combines all the PikaBot lessons taught in this series.

• Press the push button to start the PikaBot to follow the line
• PikaBot brakes if the is an obstacle less than 15cm
• PikaBot starts line follow if the obstacle is more than 15cm
• PikaBot moves forward when both line sensors detects bright
• PikaBot turns left when left line sensor detects dark
• PikaBot turns right when right line sensor detects dark