8 Commands and responses
Table 8.3 –
continued from previous page
Column
Example value
Description
2-8
06.70m
Reading in
mag
arcsec
2
.
Leading space for positive value.
Leading negative sign (-) for negative value.
A reading of
0.00m
means that the light at the sensor has reached
the upper brightness limit of the unit.
10-21
0000022921Hz
Frequency of sensor in Hz.
23-33
0000000020c
Period of sensor in counts, counts occur at a rate of 460.8 kHz
(14.7456MHz/32).
35-46
0000000.000s
Period of sensor in seconds with millisecond resolution.
48-54
039.4C
Temperature measured at light sensor in degrees C.
Leading space for positive value.
Leading negative sign (-) for negative value.
55-56
Carriage return (0x0d), Line feed (0x0a).
An example of the response is:
u, 06.70m,0000022921Hz,0000000020c,0000000.000s, 039.4C
0123456789 123456789 123456789 123456789 123456789 123456
Future versions of this reading string will only modify reported values beyond position 54. Characters 0 to 54 may be
considered stable.
8.2.3 Unit information
Unit information command “
ix
” provides details about the software in the micro-controller.
The format of the response is:
Table 8.4: Unit information request response
Column
Example value
Description
0
i
Indicates that the unit information response is being returned.
2-9
00000002
Protocol number
(8 digits). This will always be the first 8 char-
acters (after the “
i,
” response). This value indicates the revision
number of the data protocol to/from the SQM-LU. The protocol ver-
sion is independent of the feature version.
11-18
00000003
Model number
(8 digits). The model value identifies the specific
hardware model that the firmware is tailored for.
20-27
00000001
Feature number
(8 digits). The feature value identifies software
features. This number is independent of the data protocol.
29-36
00000413
Serial number
(8 digits). Each unit has its own unique serial num-
ber.
37-38
Carriage return (0x0d), Line feed (0x0a).
An example of the response is:
i,00000002,00000003,00000001,00000413
0123456789 123456789 123456789 12345678
42
Unihedron SQM-LU Operator’s Manual -
20170728
Содержание SQM-LU
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