# fake

Configuring a `fake` input controller allows you to test an input controller communicating with your machine, without any physical hardware.

This controller can have [Controls](https://docs.viam.com/reference/apis/components/input-controller/#control-field) defined in `attributes`, as seen in the “JSON Template” tab below.
However, these Controls only ever return a single `PositionChangeAbs` event on the X axis, with the [Event.value](https://docs.viam.com/reference/apis/components/input-controller/#event-object) stuck at 0.7.

- [JSON Template](https://docs.viam.com/reference/components/input-controller/fake/#tabset-referencecomponentsinput-controllerfake-1-0)

```json

```

The following attributes are available for `fake` input controllers:

| Name                     | Type   | Required? | Description                                                                                                                                                 |
| ------------------------ | ------ | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `callback_delay_sec`    | float  | **Required** | The number of seconds between callbacks getting triggered. Random between 1 and 2 if not specified. `0` is not valid and will be overwritten by a random delay. |
| `event_value`           | float  | Optional   | Set the value of events returned. Random between -1 and 1 if not specified.                                                                                 |
| `controls`              | array  | Optional   | Set the [Controls](https://docs.viam.com/reference/apis/components/input-controller/#control-field) that are present on the controller.                     |

## Test the input controller

After you configure your input controller, open the input controller’s **TEST** panel on the **CONFIGURE** or [**CONTROL**](https://docs.viam.com/monitor/default-interface/#web-ui) tabs.
View the current value of each input on your controller.