Display¶

Endpoints¶

Method	Path	Description
GET	/api/v2/device/display	Returns display state
PUT	/api/v2/device/display	Changes display state

Get Display State¶

URL	/api/v2/device/display
Method	GET
Authentication	basic
Version	2.0.0

Description¶

Returns information about the display like brightness, mode and size in pixels. Since version 2.1.0 returns information about screen saver settings.

Response¶

{
  "brightness": <0-100>,
  "brightness_mode": "[auto|manual]",
  "height": 8,
  "width": 37,
  "type": "mixed"
}

Since version 2.1.0 screensaver node has been added:

{
  "brightness": <0-100>,
  "brightness_mode": "[auto|manual]",
  "brightess_limit": {
    "max": 75,
    "min": 2
  }
  "brightness_range": {
   "max": 100
   "min": 0
  }
  "height": 8,
  "width": 37,
  "type": "mixed",
  "screensaver": {
    "enabled": [true|false],
    "modes": {
      "time_based": {
        "enabled": [true|false]
        "start_time": "<time in GMT>"
        "end_time": "<time in GMT>",
        "local_start_time": "<local time>",
        "local_end_time": "<local time>"
      },
      "when_dark": {
        "enabled": [true|false]
      }
    },
    "widget": "<widget_uuid>"
  }
}

Property	Type	Description
`brightness`	Integer	Brightness of the display. Valid values [0..100]
`brighrness_mode`	Enum	[“auto”, “manual”] auto – automatically adjust brightness manual – brightness is configured by the user
`width`	Integer	Width of the display in pixels
`height`	Integer	Height of the display in pixels
`type`	Enum	Display type. Valid values are : [“monochrome”, “grayscale”, “color”, “mixed”]

Since API version 2.1.0

`screensaver`	Object	Object for screensaver configuration (off, when dark, timebased).
`brightness_range`	Object	Optional. The minimum and the maximum values of a brightness. When setting new brightness, the new value must be in this range. Usually valid values fall between 0 and 100.
`brightness_limit`	Object	Optional. Brightnesss limitations for current conditions. When a device is powered from a computer, we can limit the maximum brightness value in order to not exceed the maximum power consumption of a device to avoid unexpected power-offs. In this case the new value of brightness can not exceed the max value of this limit.

Screensaver

Property	Type	Description
`enabled`	Boolean	Enables or disables the screensaver.
`modes`	Map	Map of modes supported by the device. Currently “time_based” and “when_dark” are supported time_based – activates if time is between start_time and end_time when_dark – activates when light sensor senses darkness.
`widget`	String	UUID of the widget that should be activated when screensaver is active. Currently clock is supported.

Property

Type

Description

enabled

Boolean

Enables or disables the screensaver.

modes

Map

Map of modes supported by the device. Currently “time_based” and “when_dark” are supported

time_based – activates if time is between start_time and end_time
when_dark – activates when light sensor senses darkness.

widget

String

UUID of the widget that should be activated when screensaver is active. Currently clock is supported.

brightness_range

Property	Type	Description
`max`	Integer	Maximum possible brightness value
`min`	Integer	Minimum possible brightness value

brightness_limit

Property	Type	Description
`max`	Integer	Current maximum brightness value limit. Can be less than max value of `brightness_range` (for example, due to the power comsumption limitation).
`min`	Integer	Current minimum brightness value limit

Example¶

Request:

GET https://<device ip address>:4343/api/v2/device/display

cURL:

$ curl -X GET -u "dev" -k \
  -H "Accept: application/json" \
  https://<device ip address>:4343/api/v2/device/display
$ Enter host password for user 'dev': <device API key>

Response:

HTTP/1.1 200 OK
CONTENT-TYPE: application/json;charset=UTF8
Transfer-Encoding: chunked
Date: Wed, 29 Jun 2016 13:47:05 GMT
Server: lighttpd/1.4.35

{
  "brightness": 100,
  "brightness_limit": {
    "max": 100,
    "min": 2
  },
  "brightness_range": {
    "max": 100,
    "min": 0
  },
  "brightness_mode": "auto",
  "height": 8,
  "width": 37,
  "type": "mixed",
  "screensaver": {
    "enabled": true,
    "modes": {
      "time_based": {
        "enabled": true,
        "end_time": "18:42:56",
        "start_time": "18:41:53"
        "start_local_time": "20:41:53"
        "end_local_time": "20:42:56"
      },
      "when_dark": {
        "enabled": false
      }
    },
    "widget": "08b8eac21074f8f7e5a29f2855ba8060"
  }
}

Update Display State¶

URL	/api/v2/device/display
Method	PUT
Authentication	basic
Version	2.0.0

Description¶

Updates display state. It is possible to change brightness, mode and screen saver settings. If brightness_mode is set to “auto”, brightness value still can be changed but this will not affect the actual brightness of the display. Brightness will be changed as soon as brightness_mode is set to “manual”. Since API 2.1.0 it is possible to configure screensaver settings.

Body¶

{
    "brightness": <0-100>,
    "brightness_mode": "[auto|manual]"
}

Since API 2.1.0:

{
    "brightness": <0-100>,
    "brightness_mode": "[auto|manual]",
    "screensaver": {
        "enabled": [true|false],
        "mode": ["when_dark"|"time_based"]
        "mode_params": {
            "enabled": [true|false],
            "start_time": "21:00:00",
            "end_time": "06:00:00"
        }
    }
}

Examples¶

Example 1. Let’s set auto brightness and enable screensaver in mode “when dark”:

Request

REST:

PUT https://<device ip address>:4343/api/v2/device/display

Content-Type: application/json
Accept: application/json

{
    "brightness_mode": "auto",
    "screensaver": {
        "enabled" : true,
        "mode": "when_dark",
        "mode_params": {
            "enabled": true
        }
    }
}

cURL:

$ curl -X PUT -k -u "dev" \
  -H "Accept: application/json"
  -H "Content-Type: application/json" \
  -d '{
        "brightness_mode": "auto",
        "screensaver": {
            "enabled" : true,
            "mode": "when_dark",
            "mode_params": {
                "enabled": true
            }
        }
    }' https://<device ip address>:4343/api/v2/device/display
$ Enter host password for user 'dev': <device API key>

Response

HTTP/1.1 200 OK
CONTENT-TYPE: application/json;charset=UTF8
Transfer-Encoding: chunked
Date: Wed, 29 Jun 2016 14:25:48 GMT
Server: lighttpd/1.4.35

{
    "success": {
        "data": {
            "brightness": 40,
            "brightness_mode": "auto",
            "height": 8,
            "type": "mixed",
            "width": 37
        },
        "path": "/api/v2/device/display"
    }
}

Since API 2.1.0:

HTTP/1.1 200 OK
CONTENT-TYPE: application/json;charset=UTF8
Transfer-Encoding: chunked
Date: Thu, 02 Mar 2017 16:24:18 GMT
Server: lighttpd/1.4.35

{
    "success": {
        "data": {
            "type": "mixed",
            "width": 37
            "height": 8,
            "brightness": 40,
            "brightness_mode": "auto",
            "brightness_range": {
                "max": 100,
                "min": 0
            },
            "brightness_limit": {
                "max": 100,
                "min": 2
            },
            "screensaver": {
               "enabled": true,
                "modes": {
                    "time_based": {
                        "enabled": true,
                        "end_time": "09:21:00",
                        "local_end_time": "12:21:00",
                        "local_start_time": "12:20:00",
                        "start_time": "09:20:00"
                    },
                    "when_dark": {
                        "enabled": false
                    }
                },
               "widget": "486f5adeee1511ebab78273c1141c9c8"
            },
        },
        "path": "/api/v2/device/display"
    }
}

Example 2. Let’s set time based screensaver from 9:00 PM to 6:00 AM. First of all, we need to convert our times to GMT. For example, if we are in GMT+2 timezone, we need to set activation time to 19:00 and deactivation time to 4:00 (subtract 2 hours from 9 pm and 6 am)

Request

REST:

PUT https://<device ip address>:4343/api/v2/device/display

Content-Type: application/json
Accept: application/json

{
    "screensaver": {
        "enabled" : true,
        "mode": "time_based",
        "mode_params": {
            "enabled": true,
            "start_time": "19:00:00",
            "end_time": "04:00:00"
        }
    }
}

cURL:

$ curl -X PUT -k -u "dev" \
  -H "Accept: application/json"
  -H "Content-Type: application/json" \
  -d '{
        "screensaver": {
            "enabled" : true,
            "mode": "time_based",
            "mode_params": {
                "enabled": true,
                "start_time": "19:00:00",
                "end_time": "4:00:00"
            }
        }
    }' https://<device ip address>:4343/api/v2/device/display
$ Enter host password for user 'dev': <device API key>

Response

HTTP/1.1 200 OK
CONTENT-TYPE: application/json;charset=UTF8
Transfer-Encoding: chunked
Date: Wed, 29 Jun 2016 14:25:48 GMT
Server: lighttpd/1.4.35

{
    "success": {
        "data": {
            "brightness": 40,
            "brightness_mode": "auto",
            "height": 8,
            "type": "mixed",
            "width": 37
        },
        "path": "/api/v2/device/display"
    }
}

Since API 2.1.0:

HTTP/1.1 200 OK
CONTENT-TYPE: application/json;charset=UTF8
Transfer-Encoding: chunked
Date: Thu, 02 Mar 2017 16:24:18 GMT
Server: lighttpd/1.4.35

{
    "success": {
        "data": {
            "type": "mixed",
            "width": 37
            "height": 8,
            "brightness": 100,
            "brightness_mode": "auto",
            "brightness_range": {
                "max": 100,
                "min": 0
            },
            "brightness_limit": {
                "max": 100,
                "min": 2
            },
            "screensaver": {
                "enabled": true,
                "modes": {
                    "time_based": {
                        "enabled": true,
                        "start_time": "19:00:00"
                        "end_time": "4:00:00",
                        "local_start_time": "6:00:00",
                        "local_end_time": "21:00:00"
                    },
                    "when_dark": {
                        "enabled": false
                    }
                },
                "widget": "08b8eac21074f8f7e5a29f2855ba8060"
            },

        },
        "path": "/api/v2/device/display"
    }
}

Note:: All timestamps must be given in GMT.