60 lines
1.7 KiB
Markdown
60 lines
1.7 KiB
Markdown
# Code
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Let's add the code so that _when the soil moisture level is low, the servo waters the plant._
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From the **soil moisture** project, we know that the moisture is low when the ``reading`` is roughly less than ``500``.
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We can use this information to add an ``if reading < 500`` in the code.
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```block
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let reading = 0
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if (reading < 500) { }
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```
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The servo is connected to pin ``P2`` so we can use ``pins servo write`` block to change the angle of the servo.
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We need it to change the angle to ``0``, wait until the water has fallen off, and move it back to ``80``.
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```block
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let reading = 0
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if (reading < 500) {
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basic.showIcon(IconNames.Umbrella)
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pins.servoWritePin(AnalogPin.P2, 0);
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basic.pause(3000)
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pins.servoWritePin(AnalogPin.P2, 80)
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basic.pause(3000)
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pins.analogWritePin(AnalogPin.P2, 0)
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}
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```
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We insert the code above in the **forever** loop of the [soil moisture code](/projects/soil-moisture/connect).
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```blocks
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radio.setTransmitSerialNumber(true)
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radio.setGroup(4)
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led.setBrightness(64)
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let reading = 0
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basic.forever(() => {
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pins.analogWritePin(AnalogPin.P1, 1023)
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reading = pins.analogReadPin(AnalogPin.P0)
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radio.sendNumber(reading / 4);
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pins.analogWritePin(AnalogPin.P1, 0)
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led.plotBarGraph(
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reading,
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1023
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)
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if (input.buttonIsPressed(Button.A)) {
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basic.showNumber(reading)
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}
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if (reading < 500) {
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basic.showIcon(IconNames.Umbrella)
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pins.servoWritePin(AnalogPin.P2, 0);
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basic.pause(3000)
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pins.servoWritePin(AnalogPin.P2, 80)
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basic.pause(3000)
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pins.analogWritePin(AnalogPin.P2, 0)
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}
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basic.pause(5000);
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})
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```
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https://youtu.be/7eC_VjH1eP0
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