Project 12 Button Control XGO

Ⅰ. Teaching Aims

Understand the triggering methods of Foxbit A/B physical buttons and the structure of event scripts.
In when button … pressed event, call the XGO emoji and action block.
Map the two buttons to “Emoji Switch” and “Fun Action” respectively, and you can expand custom combination keys.

XGO + Foxbit + MicroBlocks IDE.
XGO battery power ≥ 60 %. The robot is placed on a flat ground.
MicroBlocks status bar shows a green dot, XGO-lite extension is loaded and the development board model is Foxbit.
First, run XGO reset pose to confirm that the robot is in zero position and there is sufficient space without any obstruction.


Functions	Detect button click
Tips	It can be triggered again after you release the button

Functions	Combined buttons
Tips	Both buttons must be pressed simultaneously

Functions	5×7 dot matrix preset emojis
Tips	wink, angry, heart, etc

Functions	Delay /anti-shake /Display time for emojis
Tips	30–500 ms visual effect adjustment

Functions	Trigger built-in fun actions
Tips	Firmware translation differences: PushUp /DogPee

Corresponding script:

Online code: Click here

Corresponding script:

Online code: Click here

How to achieve the “long press for persistence”? (Tips: Poll button A pressed? in forever)
Why can adding wait 30 ms before and after high-time-consuming actions reduce button jitter and accidental touches?
If you want to change “press button A” to a random emoji, which two blocks need to be added?

Questions	Possible causes	Solutions
The button has no response.	Poor contact /Insufficient anti-shake	`wait 30 ms` in the first line of the event; Check the solder joints of the buttons
The action is stuck and does not return to its original position	Ground obstruction /Low battery power	Clear the surrounding area; Battery power ≥ 50%
The emoji does not refresh.	Long actions block the main progress	Run emojis concurrently using `launch`, or display them after the action is completed
No response when pressing A+B	The timing of pressing the two buttons is inconsistent	Keep pressing them simultaneously for ≥ 50ms before releasing