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Tow detection function (unauthorized movement) is available in many  GPS devices. After the ignition  is switched off, the sensor passes into an operating mode and continuously analyses vibrations of the vehicle. If the device registers a hit, an inclination or a movement, a notification about that is immediately sent to our server. Notifications about an “Unauthorized movement” event can be sent by Email or SMS.

8.8 Tow Detection image 1


To configure this function in the Devices app there is a particular portlet. It allows you to set the sensitivity of the sensor (accelerometer) and to configure other parameters:

  • The sensitivity of the motion sensor
    Having chosen a threshold of operation for the accelerometer, you can adjust it to react even to light hits and rockings. If usage of a car leads to false reactions of the sensor, you can adjust its sensitivity.
  • Motion power
    Determined by duration of the impact (shock) ranging from 0.1 to 1 second. Recommended value 0.3 seconds.
  • Delayed control start
    Specify how much time has to pass after switching off of the ignition, before function of control of unauthorized movement starts working. Usually if you set the value of 3-5 minutes it is enough to leave a car and to close a door.
  • Duration of the vibration
    If you assume that once the vehicle is parked, casual vibrations are possible, specify the minimum duration – there will be no reaction to tremors and shakings that last less than the specified value.
  • Vibration interval
    The interval at which device will repeat message if unauthorized movement continues. Recommended 5 minutes.
  • Return to rest time
    Time to determine the state of rest. If during this time interval there is no movement, transition to a state of rest will be fixed. Recommended value of 30 seconds.