User's Manual

UM-003-A OPS243-A User Manual 14 OmniPreSense Corporation
Simple Counter – counts objects which meet the speed/range and signal magnitude filtering settings. The
counter will count the number of objects over time which meet the filtering settings for speed/range and
signal magnitude. The count is not reported but can be queried with the N? command. The count can be
reset with the N! command. A count is triggered if 2 or more consecutive reports meet the threshold
limits. Once detected, the object is set to be counted until 4 reports missing the threshold limits are seen.
The value to start a count (default 2) can be set with the N>n command. The value to end a count (default
4) can be set with the N<n command. To start a new count, clear the running count with the N! command.
Command
Name
R/W
Value
N?
Query Count
Read
Reports number of objects counted.
{"DetectedObjectCount":3}
N!
Reset Count
Write
Resets the number of objects in counter.
{"DetectedObjectCount":0}
N>n
Count Start Threshold
Write
{"MotionSignal":"Status", "CountToPass":2,
"CountToFail":4}
N<n
Count End Threshold
Write
{"MotionSignal":"Status", "CountToPass":2,
"CountToFail":3}
Clock – set to control the reporting of the time. The time is measured in seconds/milliseconds from power
on of the module. Use the OT command to report the time in seconds and milliseconds. When the module
is put in low power state (PI), the clock will continue counting. If you wish for the module to provide “the
real time”, then set it to “the Unix Epoch time” (see wikipedia.org/wiki/Unix_time).
Command
Name
R/W
Value
C?
Query Time
Read
Ex. {“Clock”:”50”} reports 50 seconds since
power on.
C=n
Set Time
Write
Reset the clock start time. For example, n = 10
will start the clock at 10 seconds and then
continue counting.