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Watchport/A (Acceleration & Tilt Sensor)
The Watchport/A can be programmed to use either an RS-232 modem signal interface or an
ASCII command interface. In its ASCII command mode, the sensor reports the current X-axis and
Y-axis acceleration vectors relative to its 'neutral' position. In its modem signal mode, the sensor
acts as a 'tilt' detector; that is, if the sensor is bumped from its 'neutral' position, it will raise (and
then lower) its DSR signal.
Command
Description
Tells about the command set available for this
?<CR>
Watchport.
Tells what kind of Watchport is connected.
I<CR>
Calibrates the sensor.
C<CR>
Reflects the current acceleration.
A<CR>
Reads the raw axis values. These are the values that
U<CR>
would be read if the C command were never executed.
Switches to modem signal mode. Until any other
E<CR>
keystroke, the sensor uses DSR to signal 'tilt.'
Adjusts sensitivity. M is followed by a single digit: 1
Mn<CR>
(most sensitive) through 9 (least sensitive).
For starting in either mode:
Step 1: Mount the sensor at its 'neutral' position.
Step 2: Calibrate sensor to establish its 'neutral' position.
Calibrates the sensor.
C<CR>
Step 3: Verify correct calibration.
Use to verify calibration. The response should be very
A<CR>
close to 0 for both axes.
Now the sensor can either be left in ASCII mode or the E<CR> command can be sent to switch it
to modem signal mode.
Watchport Installation Guide (90000406 Rev. D) – Page 10
Watchport/A Commands
Return Value
as described in this
section
Watchport/A<CR>
OK<CR>
+/-n.nngX
+/-m.mmgY<cr>
+/-n.nngX
+/-m.mmgY<cr>
OK<CR>
OK<CR>
OK<CR>
+0.00gX +0.00gY<cr>
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