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Sensors

Some of Kontakt.io beacons, in addition to Bluetooth radio for broadcasting iBeacon and/or Eddystone packets, are also equipped with various numbers of sensors that collect data about beacons and their surroundings.

Info

In most cases to take advantage of sensors beacons need to have Kontakt.io Telemetry Packet enabled first. Data from most sensors is available via Location Engine Telemetry Streams and Kontakt.io Mobile SDKs

Accelerometer

Beacons that have an accelerometer can report raw acceleration values that they're experiencing on 3 axes as well as detect some predefined events like free-fall and double-tap.

Specification

STMicroelectronics LIS2DH
Measurement range Selectable between one of four modes: ±2g/±4g/±8g/±16g
Sensitivity Depends on measurement range: ±2g - 16mg/digit, ±4g - 32mg/digit, ±8g - 64mg/digit, ±16g - 192mg/digit
Detectable events Selectable between one of five possibilities: movement, free-fall, double-tap, movement and double-tap, free-fall and double-tap

Beacons with an accelerometer

  • Beacon Pro BP16-3
  • Asset Tag S18-3
  • Card Tag CT18-3
  • Heavy Duty Beacon HD18-3
  • Smart Beacon SB18-3

Light sensor

In order to make sure the beacons equipped with this sensor don't consume too much battery, the measurements of light intensity are not reported in common units like lux or nits, but instead this light sensor uses a very simple scale from 0 (complete darkness) to 100 (bright, sunny day without any clouds and shadows).

Even due to these limitations, light measurements are very reliable and in the same conditions will present reproducible results, making this a perfect solution for triggering some actions depending on specific conditions.

Additionally, light sensor data is used for Power Saving.

Vishay Semiconductors TEMT6200FX01
Measurement scale 0 - 100
Measurement frequency Once every 10 seconds
Peak sensitivity 550 nm

Beacons with a light sensor

  • Beacon Pro BP16-3

Motion Sensor

This sensor is en exception from a general rule - when it detects motion it does not report it anywhere, but this information is used internally on a beacon. At the moment of writing this document only Card Tag CT16-2 are equipped with motion sensors and they use them to engage and disengage Power Saving. Currently it's not possible to use this sensor for other purposes.

Thermometer

Measuring ambient temperature is possible thanks to a thermometer built in to the accelerometer package, so all beacons equipped with accelerometer also can report temperature from places around them.

Specification

STMicroelectronics LIS2DH
Measurement range From -40°C to +85°C

Calibration

The thermometer used on our beacons provides accurate information about temperature changes, but sometimes it might be necessary to provide an offset for the raw temperature in order to get actual values. Both iOS and Android Administration apps allow to change it per beacon and you can create a bulk configuration via our API by setting the temperatureOffset parameter for the new configuration.

Beacons with a thermometer

  • Beacon Pro BP16-3
  • Asset Tag S18-3
  • Card Tag CT18-3
  • Heavy Duty Beacon HD18-3
  • Smart Beacon SB18-3