Unihedron SQM-LU, Руководство оператора

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8.4 Accessories commands
8.4.3 LED accessory
For purposes of troubleshooting, an LED with series resistor can be connected to an internal pin of the SQM-LU. All
commands (seen in table 8.17) to this accessory result in a response (seen in table 8.18).
Using the LED to indicate when a reading is being requested is an ideal method to determine if the controlling software
is actually accessing the SQM-LU.
Table 8.17: LED accessory command summary
Command Description
A3Ex
Enable the LED accessory.
A3Dx
Disable the LED accessory.
A30x
Mode=Blink at reading creation.
In bright sky conditions, readings are created once per second in frequency-mode. In darker
sky conditions, the meter goes into perdiod-mode starting at 679Hz and lower, and LED
will blink at a variable rate.
A31x
Mode=Blink at reading request.
A3x
LED accessory status.
Table 8.18: LED accessory response summary
Position Example value Description
0
A,
Confirmation of display accessory command.
1
3,
Accessory 3 (LED).
2
e ,
E for enabled.
D for disabled.
3
m ,
Model number (where m = 0-7).
0 = LED connceted to pin-13 through 1k resistor to ground.
4
m ,
Mode of operation (where m = 0-1):
0 = Blink at reading creation.
1 = Blink at reading request.
Carriage return (0x0d), Line feed (0x0a).
An example response to “
A2x
” is:
A,3,E,0,1
Unihedron SQM-LU Operator’s Manual -
20170728
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