The pupils normally do some dilation movement on their own…but you can have them respond to light if you like! Use the lightSensor keyword along with a pin number where the light sensor is connected. If it’s on a Seesaw interface chip (e.g. on MONSTER M4SK), add 100 to the pin number. For example, on MONSTER M4SK the built-in light sensor is:
"lightSensor" : 102
And for HalloWing M4, use:
"lightSensor" : 21
(Add a trailing comma if this appears mid-file.)
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