64 lines
1.8 KiB
Markdown
64 lines
1.8 KiB
Markdown
# Step counter
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This project turns the @boardname@ into a simple step counter. A step counter is also known as a pedometer. Each **shake** event increments a **counter** variable. The step count is displayed on the LEDs.
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## ~ hint
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If you built a watch in the [make](/projects/watch/make) portion of the of the [Watch](/projects/watch) project, you can use the code from this project with it too.
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## ~
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## A counter
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To build a counter, we'll need a variable to store the number of steps.
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```blocks
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let step = 0
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step = 0
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```
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## Detecting a step
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Assuming you attach the @boardname@ to your foot or ankle, it will get shaken when you take a step. We can use the ``||input:on shake||`` event to detect a step (it should notice a step most of the time). Let's add the code to increment ``step`` by `1` when the @boardname@ is shaken.
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```blocks
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let step = 0
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input.onGesture(Gesture.Shake, function () {
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step += 1
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})
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step = 0
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```
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## How many steps so far?
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We want to always see how many steps were counted. In a ``||basic:forever||`` loop, we add a ``||basic:show number||`` block to display the value of ``step``.
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```blocks
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let step = 0
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input.onGesture(Gesture.Shake, function () {
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step += 1
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})
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basic.forever(function() {
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basic.showNumber(step)
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})
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step = 0
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```
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## Display lag
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Did you notice there is a lag, or delay, in the display of steps? This is because the ``step`` value can change **while** the @boardname@ is displaying a number. To remove the lag, add ``||led:stop animation||`` after changing the value of ``step``.
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```blocks
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let step = 0
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input.onGesture(Gesture.Shake, function () {
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step += 1
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led.stopAnimation()
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})
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basic.forever(function() {
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basic.showNumber(step)
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})
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step = 0
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```
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