If your code isn’t running as expected, check the following common issues:
1. Code Connected to the Start Block
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Make sure all code blocks (except function definitions) are connected to the [START] block.
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Code blocks that aren’t connected will not run when you press Upload.
2. Empty Code Blocks
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Empty blocks will prevent your code from loading or running.
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Remove or fill in any empty blocks.
3. Match Inputs and Outputs to Your Circuit
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Ensure the inputs in your code match the inputs in your circuit.
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Example: If your input is on IN 3, a
[WAIT FOR IN1 TO BE ON]block will not work. Change it to[WAIT FOR IN3 TO BE ON].
4. Add [WAIT] Blocks Between Animation Frames
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Code runs very quickly, so animations may appear too fast.
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Add
[WAIT]blocks between frames to make animations visible.
5. Add [WAIT] Blocks After [SCROLLING TEXT]
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Scrolling text continues without stopping.
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Add a
[WAIT]block after a[SCROLLING TEXT]block. The wait time should correspond to the length of the message.
6. Follow Transform Blocks with [SEND IMAGE]
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Blocks like
[ROTATE IMAGE BY 90],[MOVE IMAGE UP BY 1], and[ADD PIXEL AT X: Y: TO IMAGE]require a[SEND IMAGE]block afterward to display changes on the LED matrix.
7. Place Logic Blocks Inside a Loop
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To continuously check a condition, put dark blue logic blocks inside a
[DO FOREVER]loop. -
Example: To detect when a button on IN 1 is pressed, the logic block must be inside a loop to check repeatedly.
8. Set and Use Variables
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Ensure that any variables you create are both set to a value and used in your code.
Debugging Checklist
Still Having Trouble?