MTD2000 AT Command Guide R12
Confidential
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25.5 Watchdog Timer
The device provides watchdog function to prevent firmware lockup. If any function in the
firmware is lockup for a period of time (65 sec for software watchdog timer / 90 sec for
hardware watchdog timer), the watchdog timer will kick in to reset the device.
25.6 Firmware Upgrade
The firmware of the device can be upgraded over the air using the $SU command or via
the serial port using the Downloader on PC.
25.7 Test Mode
The device provides a test mode for peripherals test in factory. The device will enter test
mode when panic button is pressed and hold for 2 sec upon power up. Upon entering
test mode (around 10 sec from power up), the device will display “MTD2000 Test
Mode”. User may press the RESET button to exit test mode. In test mode, the GSM
module will always turn on and will not enter cyclic mode.
