MTD2000 AT Command Guide R12
Confidential
DAVISCOMMS (S) PTE LTD
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Note: Query setting.
$BC: 0,9
21.6 Motion Detection Calibration – AT$MZ
For every device installation on vehicle, the motion detection needs to be calibrated to
zero for sensitive detection of motion / acceleration. This command allows user to
instruct the device to start the motion detection calibration during calibration mode. The
calibration process is as follows:
- Long press the reset button for 3 sec to enter calibration mode.
- Send this command to the device to start the calibration. The device will take less
than one min for calibration and return a unsolicited response to indicate
calibration result.
Note:
1. When the reset button is long pressed for 3 seconds, the device will enter
calibration mode and send out an unsolicited response to indicate calibration
entry.
2. Once the motion detect is calibrated (by $MZ command) or 5 min is due, the
device will return to normal mode and send out an unsolicited response to
indicate calibration exit. This command ($MZ) has no effect during normal mode.
3. When the reset button of device without dead reckoning or G-sensor (motion
detect) is long pressed for 3 sec, it will send out an unsolicited response to
indicate calibration is not supported.
4. During normal operation, if the G-sensor (motion detect) fails to work, the device
will send out an unsolicited response to indicate G-sensor failed.
Syntax
Command
Response
AT$MZ
Note: Execute command.
OK
Followed by x, y, z calibrated values upon
completion.
Parameters
Nil
Example
Command
Response
