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9
Trouble shooting
Since the OPR3301 has no display, it also doesn't have a system menu to resort to
when you've installed a wrong application that prevents you from loading new software
on the OPR3301 or when your OPR3301 is no longer responding for some reason.
For this reason the OPR3301 has a few escape mechanisms that allow you to restart
or temporarily halt the application to be able to install new software.
9.1
Restart mechanisms
Automatic
The OPR3301 has a watchdog timer to determine whether the OS is still
running or has crashed. This watchdog will cause the OPR3301 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 OPR3301 has 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 the trigger key for at least 20
seconds. After the OPR3301 has sounded the restart beep, you can release
the key to complete the restart.
9.2
Halting your application
First make sure the battery isn't empty and the OPR3301 is not lying in the
CRD3301 cradle.
Restart your application using one of the two restart methods listed above, but
keep the trigger key pressed.
While keeping the trigger key pressed, place the OPR3301 in the CRD3301 cradle
and release the trigger key.
If successful, the LED of your OPR3301 should start blinking orange after 3 seconds.
You should now be able to establish a Bluetooth connection (see chapter 1.5.2.), which
will allow you to load new software on the OPR3301 using a third party Bluetooth
dongle or the CRD3301 cradle (at a default baud rate of 9600). See chapter 6 for more
information.
To exit the halted-application state, press the trigger key again for 20 seconds or load
new software.
