Answers.Body: <p>Brick-to-brick communication is not possible using the EV3 Classroom software. You will need to use a different programming environment.</p>
  <p>The broadcast blocks in EV3 Classroom (and other Scratch-based programming languages) only send messages between stacks of blocks within the Scratch program. They do not send messages to other connected EV3s.</p>
  <p><a href="https://i.sstatic.net/Vu131.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Vu131.png" alt="screenshot of scratch broadcast blocks" /></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-03-05T18:27:33.140Z
Answers.LastActivityDate: 2022-03-06T21:35:20.747Z
Answers.LastEditDate: 2022-03-06T21:35:20.747Z
Answers.UserDisplayName: David Lechner
Body: <p>I have a big robot that needs four big motors to drive it and two small motors for other functions -&gt; I need two bricks to communicate with each other because they need to use the same sensors.</p>
  <p>I get the bricks connected via Bluethooth, but when I send messages with the &quot;send message&quot; and &quot;when I receive message&quot; block, the other brick does not respond.
  What could be the reason for this?</p>
  <p>I use:</p>
  <ul>
  <li>Both bricks with 1.09H</li>
  <li>EV3 Classroom (1.5.3)</li>
  <li>The bricks have different names</li>
  </ul>
  
Tags: <ev3><bluetooth><connections>
Title: Connected EV3 bricks don't react (EV3 Classroom)
UserDisplayName: Thomas
ThreadText: # Connected EV3 bricks don't react (EV3 Classroom)
  
  (Asked by: username_0 on 2022-03-05)
  
  I have a big robot that needs four big motors to drive it and two small motors for other functions -> I need two bricks to communicate with each other because they need to use the same sensors.
  
  I get the bricks connected via Bluethooth, but when I send messages with the "send message" and "when I receive message" block, the other brick does not respond.
  What could be the reason for this?
  
  I use:
  
  * Both bricks with 1.09H
  * EV3 Classroom (1.5.3)
  * The bricks have different names
  
  **Tags:** ev3, bluetooth, connections
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2022-03-05. Score: 2
  
  Brick-to-brick communication is not possible using the EV3 Classroom software. You will need to use a different programming environment.
  
  The broadcast blocks in EV3 Classroom (and other Scratch-based programming languages) only send messages between stacks of blocks within the Scratch program. They do not send messages to other connected EV3s.
  
  [![screenshot of scratch broadcast blocks](https://i.sstatic.net/Vu131.png)](https://i.sstatic.net/Vu131.png)
  
  
  ---
  
  