##### Brief description

When the device storage space is insufficient to meet the upload requirements, this interface is called to clear the device storage space.

##### Request URL

Interface address (case must be consistent)

- `http://192.168.1.x/control`

##### Request method

- GET

##### Request message example

```http
GET /control?action=clearspace&sign=6B1C08604C09C08AF80DD251E019**** 
HTTP/1.1
Host: 192.168.1.x
Accept: */*
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
```

##### Parameters

| Parameter Name | Required | Type | Example | Description |
| --- | --- | --- | --- | --- |
| `action` | Yes | string | clearspace | Action command: clearspace Cleans storage space |
| `sign` | Yes | string | `1E3B1050FBE6F1B53B4F858CD8E39***` | The signature value calculated through the signature algorithm |

##### Example of returning content

```http
HTTP/1.1 200 OK
Content-Length: 50
Content-Type: application/json; charset=utf-8
```

##### Example of returning content

```json
{"STATE":"SUCCEED"}
```

##### Return content field description

| Parameter Name | Type | Example | Description |
| --- | --- | --- | --- |
| `STATE` | string | SUCCEED / ERROR | Business status |