UI & Display Config

Configures the device’s user interface language, screen lock behaviour, log level, and display orientation.

Key path: devcfg.ui

{
  "devcfg": {
    "ui": {
      "lang": "en:EN:0,fr:FR:1",
      "enable_lock": true,
      "lock_pin": "0000",
      "lock_timeout_secs": 60,
      "log_level": "0:RUN:1,1:INFO:0,2:DEBUG:0",
      "visitor_id": "NOTSET",
      "auto_rotate": false,
      "display_orient": 0
    }
  }
}

lang

Defines the available languages and which one is active. Format: langCode:LANG_NAME:activeFlag, comma‑separated.
Only one language may have activeFlag=0.

Configuration variables

• Type: string
• Default: "en:EN:0"

{ "devcfg": { "ui": { "lang": "fr:FR:0,en:EN:0,de:DE:1" } } }

enable_lock

When true, the lock screen is enabled. The device locks after lock_timeout_secs of inactivity and requires lock_pin to unlock.

Configuration variables

• Type: boolean
• Default: false

{ "devcfg": { "ui": { "enable_lock": true } } }

lock_pin

PIN code for unlocking the device.

Configuration variables

• Type: string
• Default: "0000"

{ "devcfg": { "ui": { "lock_pin": "1234" } } }

lock_timeout_secs

Seconds of inactivity before the lock screen activates.

Configuration variables

• Type: integer
• Default: 60

{ "devcfg": { "ui": { "lock_timeout_secs": 30 } } }

log_level

Controls which log levels are displayed. Format: level:name:enabled, comma‑separated. enabled=1 shows that level, 0 hides it.

Configuration variables

• Type: string
• Default: "0:RUN:1,1:INFO:0,2:DEBUG:0"

{ "devcfg": { "ui": { "log_level": "0:RUN:1,1:INFO:1,2:DEBUG:0" } } }

visitor_id

Identifier for the current visitor/user, used in logs and on screen.

Configuration variables

• Type: string
• Default: "NOTSET"

{ "devcfg": { "ui": { "visitor_id": "guest42" } } }

auto_rotate

If true, the display rotates automatically based on the orientation sensor.

Configuration variables

• Type: boolean
• Default: false

{ "devcfg": { "ui": { "auto_rotate": true } } }

display_orient

Forces a fixed display orientation when auto_rotate is false.

Configuration variables

• Type: integer (0 or 1)
• Default: 0

Value	Orientation
0	Portrait
1	Inverted portrait

{ "devcfg": { "ui": { "display_orient": 1 } } }

Related

• UI State (Uplink) — current page and DV
• Lock Screen DVs — defining a lock DV