wrappingS-SENSOR-LIGHT.js File Reference

Wrappers for the Ambient Light Sensor. More...

Variables
var	hc = sensorapi_prng_functions + drawIlluminance + init_data
var	wrappers

Detailed Description

Wrappers for the Ambient Light Sensor.

See also

https://www.w3.org/TR/ambient-light/

Author

Copyright (C) 2021 Radek Hranicky

License:

SPDX-License-Identifier: GPL-3.0-or-later

MOTIVATION The AmbientLightSensor returns illuminance of the device's environment. This is another value that describes the nearby physical surrounding of the device, and can thus be used together with other readings for creating a unique fingerprint.

WRAPPING On examined stationary devices inside an office, the illuminance measured was between 500 and 900, depending on the concrete position's light conditions. All measured values were rounded to nearest 50 illuminance value. The wrapper silumlates the same behavior. At start, a pseudorandom illuminance value is drawn. As we simulate a stationary device, this value remains constant for all AmbientLightSensor.prototype.illuminance calls.

POSSIBLE IMPROVEMENTS Simulation of changes in the illuminance.

Variable Documentation

hc

var hc = sensorapi_prng_functions + drawIlluminance + init_data

wrappers

var wrappers

Initial value:

= [
    {
      parent_object: "AmbientLightSensor.prototype",
      parent_object_property: "illuminance",
      wrapped_objects: [],
      helping_code: hc,
      post_wrapping_code: [
        {
          code_type: "object_properties",
          parent_object: "AmbientLightSensor.prototype",
          parent_object_property: "illuminance",
          wrapped_objects: [],
          
          wrapped_properties: [
            {
              property_name: "get",
              property_value: `
              function() {
                return illuminance;
              }`,
            },
          ],
        }
      ],
    },
  ]
  add_wrappers(wrappers)