5f7a8e5301
* update yotta defaults for 16kb devices * refactor deprecated blocks * updates for button events * update button events * update refference * update docs * update docs * update button event blocks * update docs * update block id
57 lines
2.0 KiB
Markdown
57 lines
2.0 KiB
Markdown
# On Pin Event
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Start an [event handler](/reference/event-handler) (part of the
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program that will run when something happens, like when a button is
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pressed). This handler works when you touch pin `0`, `1`, or `2`
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together with `GND`, and release it within 1 second. You can choose another event type by using
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the [button event block](/reference/input/button-event). Possible event types are `pressed down` (1), `released up` (2), `clicked` (3), `long clicked` (4) or `hold` (5).
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When you are using this function in a web
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browser, click the pins on the screen instead of the ones on the
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@boardname@.
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If you hold the `GND` pin with one hand and touch pin `0`, `1`, `2` or `3`
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with the other, a very small (safe) amount of electricity will flow
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through your body and back into the @boardname@. This is called
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**completing a circuit**. It's like you're a big wire!
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```sig
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input.onPinTouchEvent(TouchPin.P0, input.buttonEventClick(), () => {
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})
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```
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## ~hint
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This function works best when the @boardname@ is using batteries for power,
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instead of the USB cable.
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## ~
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## Parameters
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* ``name`` means the pin that is being pressed, either `P0`, `P1`, or `P2`
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## Pin presses in action
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See how the @boardname@ detects a press at a pin or on something connected to a pin in this video:
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https://www.youtube.com/watch?v=GEpZrvbsO7o
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## Example: pin pressed counter
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This program counts how many times you press the `P0` pin.
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Every time you press the pin, the program shows the number of times on the screen.
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```blocks
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let count = 0
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basic.showNumber(count)
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input.onPinTouchEvent(TouchPin.P0, input.buttonEventClick(), () => {
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count = count + 1
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basic.showNumber(count)
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})
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```
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## See also
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[@boardname@ pins](/device/pins), [pin is pressed](/reference/input/pin-is-pressed), [analog read pin](/reference/pins/analog-read-pin), [analog write pin](/reference/pins/analog-write-pin), [digital read pin](/reference/pins/digital-read-pin), [digital write pin](/reference/pins/digital-write-pin), [button event block](/reference/input/button-event)
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