node-ddcci is currently only supported on Windows.

npm install @hensm/ddcci

const ddcci = require("@hensm/ddcci");
for (const monitor of ddcci.getMonitorList()) {
 console.log(`${monitor} current brightness: ${ddcci.getBrightness(monitor)}`);
 ddcci.setBrightness(monitor, 25);
}

• getMonitorList()

  Gets a list of the current connected monitors.

  • Return value

    An array of String containing the monitor IDs.

• getBrightness(monitorId)

  Queries a monitor's brightness level.

  • Parameters

    • monitorId
String. ID of monitor for which to query the brightness.

  • Return value

    An integer, typically between 0-100, representing the current brightness.

• getMaxBrightness(monitorId)

  Queries a monitor's maximum brightness level.

  • Parameters

    • monitorId
String. ID of monitor for which to query the brightness.

  • Return value

    An integer, typically between 0-100, representing the maximum brightness.

• setBrightness(monitorId, level)

  Sets a monitor's brightness level.

  • Parameters

    • monitorId
String. ID of monitor for which to set the brightness.
    • level
integer. Between 0-100 representing the new brightness level.

• getContrast(monitorId)

  Queries a monitor's contrast level.

  • Parameters

    • monitorId
String. ID of monitor for which to query the contrast.

  • Return value

    An integer, typically between 0-100, representing the current contrast.

• getMaxContrast(monitorId)

  Queries a monitor's maximum contrast level.

  • Parameters

    • monitorId
String. ID of monitor for which to query the contrast.

  • Return value

    An integer, typically between 0-100, representing the maximum contrast.

• setContrast(monitorId, level)

  Sets a monitor's contrast level.

  • Parameters

    • monitorId
String. ID of monitor for which to set the contrast.
    • level
integer. Between 0-100 representing the new contrast level.

• _getVCP(monitorId, vcpCode)

  Queries a monitor for a VCP code value.

  • Parameters

    • monitorId
String. ID of monitor for which to query the VCP feature.
    • vcpCode
integer. VCP code to query

  • Return value

    An array of two integer values in the format of [currentValue, maxValue].

• _setVCP(monitorId, vcpCode, value)

  Sets the value of a VCP code for a monitor.

  • Parameters

    • monitorId
String. ID of monitor for which to set the VCP feature.
    • vcpCode
integer. VCP code to set.
    • value
integer. Value of the VCP code.

• _refresh()

  Refreshes the monitor list.