The diagram below shows the specific parts of the sensor. Read further to explore the functionality of each part of the sensor.

  1. Sensor End Cap (Direct Light)
  2. Status Indicator
  3. On/Off Switch
  4. USB Port
  5. Unique ID Number
  6. Ambient Light Sensor

Sensor End Cap, Directional light, colour sensors and illumination LED (1)

Most Smart Wireless Sensors feature an end cap that is specific to the requirements of the device's internal sensor. The end cap for the Light sensor houses the directional light sensor (fast), directional light sensor (slow), RGB sensor and the LED light source. The Light source is on the smaller hole (at the bottom of the plate when the label of the sensor is uppermost). The light sensors are in the larger hole to the top of the sensor plate.

The light sensor and illuminating LED are open to the environment to maximise performance, they are not protected from contact with anything in the environment.

The Status Indicators (2)

The sensor features a single status indicator that changes colour and flashes. See the table below for further information.

Status Light


No light

Sensor is Off. Short press the On/Off switch

Blue flashing

Sensor On and Bluetooth advertising

White flashing

Charging via USB mains charger or USB port

Green flashing

Communication with the EasySense2 app (via USB or Bluetooth) has been established

Orange flashing

Recording data

Red flashing

Battery is low

On/Off Switch (3)

The sensor's on/off switch allows you to turn the sensor on, off or perform a hard reset.

To switch the sensor off

  • Press and hold down the On/Off switch until the white light shows, then release.
  • If not communicating with the EasySense2 app, the sensor will turn off after a period of one hour of inactivity. 

Hard resetting the sensor

  • If necessary, attach the sensor to power.
  • Press and hold down the On/Off button for at least 8 seconds until the status LED gives a flash of blue light, then release.
  • If the sensor fails to respond, contact Product Support at Data Harvest. Please provide details of:  
    • The computer platform it is being used with and the EasySense2 app’s version number.
    • A description of the problem being encountered. 

USB Port (4)

Use to connect to a computer or a charging unit.

For specific USB or Bluetooth connectivity instructions, please see the 'Connectivity' section of this documentation. 

For instructions on charging your device, see the section on 'Charging the Sensor'. 

Unique ID Number (5)

All Smart Wireless Sensors are labelled with a unique ID number. This number is used in the EasySense2 app, so that you can identify each sensor when making a connection wirelessly.

Ambient Light Sensor (6)

The sensor located under the small transparent window measures the ambient light.