1.5 KiB
On Pin Pressed
Start an event handler (part of the program
that will run when something happens, like when a button is pressed).
This handler works when you press pin 0, 1, or 2 together with GND.
When you are using this function in a web browser, click the pins on the screen instead of the ones
on the BBC micro:bit.
If you hold the GND pin with one hand and touch pin 0, 1, or 2 with the other,
a very small (safe) amount of electricity will flow through your body and back into
the micro:bit. This is called completing a circuit. It's like you're a big wire!
input.onPinPressed(TouchPin.P0, () => {
})
~hint
This function works best when the BBC micro:bit is using batteries for power, instead of the USB cable.
~
Example: pin pressed counter
This program counts how many times you press the P0 pin.
Every time you press the pin, the program shows the number of times on the screen.
let count = 0
basic.showNumber(count, 100)
input.onPinPressed(TouchPin.P0, () => {
count = count + 1
basic.showNumber(count, 100)
})
Lessons
See also
BBC micro:bit pins, pin is pressed, analog read pin, analog write pin, digital read pin, digital write pin