/   Robotics with Spike Prime

Events

Now that we know how to create basic code sequences with repeated patterns, let's learn about a way to trigger different sequences, called Events.

Events are a way to trap something that happens and then trigger some program execution.

We already used one type of event - when program starts.

But there are many other ones, for instance when the user clicks a button.

Spike Hub Buttons

You've already used the Spike Hub Power/Home button:

And maybe the Bluetooth button:

But, there are two direction buttons as well, and we can use them to control events.

When Button Pressed Event

So let's make a program with the following logic:

• When the Left button is pressed, show a smiley face
• When the Right button is pressed, show a sad face

Find the correct Event block under the Events blocks tab, and add the appropriate Light block, e.g:

Challenge: Other Events

Look at some of the other events.

Some events have to do with external sensors (color, limit switch/push-button, ultrasonic) - we will deal with those later.

Others have to do with the Hub itself and its internal sensors, so let's start with exploring some of those now:

• When Shaken (easy)
  • Make a program that sounds an alert whenever it's shaken
    
    
• When Shaken (medium)
  • Make a Random Dice that shows a number between 1 and 6 when the Hub is shaken (use Operators tab to find a block that generates random numbers)
    
    
• When [Hub Face] is up (hard)
  • Make a program that shows an arrow pointing "up" no matter which way you're holding the Hub.
    

And think of ways to use these:

• When [loudness/timer]
• When Tilted [direction]

Some solutions to the above challenges can be found below...

Try to program on your own first, and only look when you give up!

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When Shaken (easy):

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When Shaken (medium):

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When [Hub Face] is up (hard)