Opticon PX 20 v3791A Bluetooth demo Quick Guide - Manual (Page 15)

14
Trouble shooting
Since the OPN200x and PX20
don’t have displays, they also don't have a system menu to
resort to when a crashing application or OS prevents you from loading new software on the
OPN200x / PX20.
For this reason the OPN200x and PX20 have a few escape mechanisms to allow you to
restart, halt your application, and/or install new software. This can be very useful in case the
OPN200x or PX20 has crashed or is constantly restarting due to a crashing application.
Restart mechanisms
Automatic
The OPN200x and PX20 have watchdog timers to determine whether the OS
is still running or has crashed. The watchdog timer will cause the device to
restart after 3 seconds if the OS has crashed. This watchdog timer will not
cause a restart when only the application has crashed.
Manually
The OPN200x and PX20 have a manual restart mechanism that allows you to
restart in situations that the OS is still running, but your the application has
crashed. In order to activate this mechanism, press and hold both the trigger
and delete key for at least 20 seconds. After the OPN200x/PX20 has sounded
a short beep, you can release both keys to complete the restart.
Halting your application
 Restart your application using one of the two restart methods listed above, but keep both
keys pressed after the short beep.
 Release the trigger key first to halt the application.
If successful, the LED of your OPN200x/PX20 should now be blinking orange. You should
now be able to load new application or OS software.
To exit the halted application state, press both keys for 20 seconds
Halting the Operating System (only necessary in case a corrupt OS is
installed)
 Restart your application using one of the 2 methods listed above, but keep both keys
pressed after the short beep.
 Release the clear key first to halt the Operating system.
If successful, the LED of your OPN200x/PX20 should now be blinking red. You should now be
able to load a new OS.
To exit the halted Operating System state, press both keys for 3 seconds