pxt-calliope/docs/reference/pins/servo-write-pin.md

# Servo Write Pin

Write a value to the servo on the specified [pin](/device/pins)
and control the shaft.

This function will move the shaft of a standard servo to the specified
angle, or set the speed of a continuous rotation servo. (`0` specifies
full speed in one direction, `180` specifies full speed in the other,
and approximately `90` specifies no movement.)

```sig
pins.servoWritePin(AnalogPin.P0, 180)
```

## Parameters

* ``name``: a [string](/types/string) that specifies the pin name (`P0` through `P4`, or `P10`)
* ``value``: a [number](/types/number) from `0` through `180`

## Examples

### Setting the shaft angle to midpoint on a servo

```blocks
pins.servoWritePin(AnalogPin.P0, 90)
```

### Controlling the shaft by using the tilt information of the accelerometer

```blocks
basic.forever(() => {
    let millig = input.acceleration(Dimension.X)
    // map accelerometer readings to angle
    let angle = pins.map(millig, -1023, 1023, 0, 180)
    pins.servoWritePin(AnalogPin.P0, angle)
})
```

### Setting the full speed on a continuous servo

```blocks
pins.servoWritePin(AnalogPin.P0, 0)
```

## See also

[@boardname@ pins](/device/pins), [servo set pulse](/reference/pins/servo-set-pulse)

[Brief Guide to Servos](https://www.kitronik.co.uk/pdf/a-brief-guide-to-servos.pdf)