Lufft SHM31 - Calibrate Offset and Angle

Communication in SDI-12 mode
50 Snow depth sensor SHM 31, V2.1
Example:
0XRES!
0XRESok<CR><LF>
10.11.3. End measurement command
The command ends the automatic snow depth measurement, e.g. for setting and calibration work.
Command: aXMEN!
Response: aXMENok<CR><LF>
If procedures that prohibit execution of the command are active,
aXMENbusy<CR><LF>
will be the response and the command will be ignored.
10.11.4. Start measurement command
The command starts the automatic snow depth measurement if it was disabled, e.g. for setting
and calibration work.
Command: aXMST!
Response: aXMSTok<CR><LF>
If procedures that prohibit execution of the command are active,
aXMSTbusy<CR><LF>
will be the response and the command will be ignored.
10.11.5. Laser on command
The command switches the laser on continuously, e.g. for setting the measuring point.
Command: aXLON!
Response: aXLONok<CR><LF>
If procedures that prohibit execution of the command are active,
aXLONbusy<CR><LF>
will be the response and the command will be ignored.
10.11.6. Laser off command
The command switches the laser that was previously switched on continuously off again.
Command: aXLOF!
Response: aXLOFok<CR><LF>
If procedures that prohibit execution of the command are active,
aXLOFbusy<CR><LF>
will be the response and the command will be ignored.
10.11.7. Calibrate offset and angle command
The command starts a measuring process to determine distances and angle. The determined
values are set as offsets / reference heights and angle correction values.
Command: aXARV!
Response: aXARVok<CR><LF>
If procedures that prohibit execution of the command are active,
aXARVbusy<CR><LF>
will be the response and the command will be ignored.