Digital Matter devices have the capability to buzz and/or set a digital output after a period of time in trip. 


DeviceFirmware Version
G1001.23
Dart22.3/3.3

How does this feature work?

When a trip starts, the warning and alert countdowns begin. These countdowns will continue until they elapse or the trip ends. When the warning countdown elapses, the warning buzzer will sound, and when the alert countdown elapses the alert buzzer will sound and any enabled digital outputs will be set.


Typically this is used for driver fatigue. The warning buzzer is used to alert the driver that they are nearing their maximum allowable driving time, and the alert buzzer is used to alert the driver that they have reached the maximum allowable time and must take a break as soon as possible. The output also aids in telling the driver that they must take a break soon, for example, it could be wired to a light as a reminder that they are required to take a break.


Since the countdown is based on trips, if the device is wired for ignition based trips, the device will not register a break in driving until the ignition is off. Otherwise, if the device is configured for movement trips only, it will not register a break in driving until the movement trip end time elapses.


Setup on OEM Server:

In order to use this feature, it must first be enabled on OEM. If this parameter tab is available in OEM, the device has this feature, if not, it does not have it.


  • Fatigue Warning Period - This is the period of time in trip before the warning buzzer sounds. How long each buzz lasts, and how many buzzes are determined by the following two settings. This parameter must be smaller than the Fatigue Alert Period. If it is not, it is ignored. 
  • Warning Buzzing Period - This is the length of every buzz that sounds when the Fatigue Warning Period elapses.
  • Warning Buzz Count - This is the amount of buzzes that sound when the Fatigue Warning Period elapses.
  • Fatigue Alert Period - This is the period of time before the alert buzzer sounds. How long each buzz lasts, and how many buzzes are determined by the following two settings. 
  • Alert Buzzing Period - This is the length of every buzz that sounds when the Fatigue Alert Period elapses.
  • Enable Digital Output 1 - If this is enabled, digital output 1 will be set active when the Fatigue Alert Period elapses. It will be set inactive when the trip ends. The output function must be configured as "Digital Output"
  • Enable Digital Output 2 - If this is enabled, digital output 2 will be set active when the Fatigue Alert Period elapses. It will be set inactive when the trip ends. The output function must be configured as "Digital Output"