Configure AS-614 Position Detection

AS-614 provides Mode 1 for wall/side installation and Mode 2 for ceiling installation. Both modes report position and reflected power through fixed-width ASCII packets. They can also convert X/Z position into coarse one-meter zone codes.

Choose the position mode

Mode	Installation	Distance output	Zone output	Vacancy
1	Wall or side	#	*	#0! or *0!
2	Ceiling	$	~	$0! or ~0!

Use zone 0 for coordinate output and zone 1 for coarse zone output. Use exten 1 to add Y to coordinate packets.

Coordinate orientation

Wall installation

• X: left (-), right (+)
• Y: down (-), up (+)
• Z: forward (+)

Ceiling installation

• X: left (-), right (+)
• Y: height below the radar (-)
• Z: backward (-), forward (+)

AS-614 uses positive 0-180° angle values rather than signed angles. Left/down is near 0°, and right/up is near 180° according to the manual diagrams.

note

Mounting orientation The AS-614 command table does not document rotate or walltilt. Align the board mechanically with the intended coordinate frame and validate all axis signs after mounting.

See the wall and ceiling diagrams in Overview — Coordinate system. Configure coordinate limits in millimeters; position packets report centimeters. Verify physical axis directions after mounting.

Mode 1: Wall position measurement

Documented defaults:

Setting	Default
xmin / xmax	-4000 / +4000 mm
ymin / ymax	-2000 / +1500 mm
zmin / zmax	+400 / +8000 mm
alrmin / alrmax	0° / 180°
adumin / adumax	20° / 160°
Target count	3 default; 5 maximum

The product specification lists an 8 m maximum distance. The manual separately describes an approximately 5 m reliable range for people and says performance depends on angle, motion, target type, and environment. Treat 8 m as an upper product limit, not a guaranteed person-detection range.

Recommended setup order

Send one command at a time and wait more than 500 ms:

stop
mode 1
reset
zone 0
exten 0
reset
info
start

After validating the coordinate frame, stop output, set measured ROI limits, then restart. Use freset only when a full factory reset is intentional.

Mode 1 distance packets

Normal output:

#ABBBBCCCDDD!

Field	Length	Meaning
#	1	Mode 1 coordinate packet
A	1	Target index
BBBB	4	Signed X coordinate, cm
CCC	3	Positive Z coordinate, cm
DDD	3	Reflected power, values above 999 reported as 999
!	1	End marker

Extended output (exten 1):

#ABBBBCCCCDDDEEE!

This adds signed Y (CCCC); DDD becomes positive Z and EEE is reflected power. Vacancy packet: #0!.

Mode 1 zone packet

*ABC!

• A: target index
• B: coarse X zone digit
• C: coarse forward-Z zone digit

The X/Z plane is divided into approximately one-meter bands. The outermost digits include values beyond the drawn grid. Validate boundary behavior before using the zone code for automation. Vacancy packet: *0!.

Mode 2: Ceiling position measurement

Documented defaults:

Setting	Default
xmin / xmax	-3000 / +3000 mm
ymin / ymax	-3000 / -400 mm
zmin / zmax	-3000 / +3000 mm
alrmin / alrmax	15° / 165°
adumin / adumax	15° / 165°

At a 2.5 m ceiling height, the manual describes an approximate 4-5 m floor detection diameter. Actual coverage depends on height, body reflection area, motion, clutter, and installation geometry.

Recommended setup order

stop
mode 2
reset
zone 0
exten 0
reset
info
start

Ceiling Y values are negative. The command table says ymax is ignored and processed as 0 in one note, while the Mode 2 default table lists ymax = -400 mm. Query info and verify the active firmware before scripting a ceiling-height boundary.

Mode 2 distance packets

Normal output:

$ABBBBCCCCDDD!

Field	Length	Meaning
$	1	Mode 2 coordinate packet
A	1	Target index
BBBB	4	Signed X coordinate, cm
CCCC	4	Signed Z coordinate, cm
DDD	3	Reflected power, values above 999 reported as 999
!	1	End marker

Extended output (exten 1):

$ABBBBCCCCDDDDEEE!

This adds negative Y (CCCC); DDDD is signed Z and EEE is reflected power. Vacancy packet: $0!.

Mode 2 zone packet

~ABC!

• A: target index
• B: coarse X zone digit
• C: coarse signed-Z zone digit

The ceiling X/Z plane is divided into approximately one-meter bands. Confirm the center boundary and outer-band behavior with real packets. Vacancy packet: ~0!.

Axes show zone digits, not meters. The highlighted 55 and target-1 packets are illustrative codes, not measured positions.

Tune the region of interest

1. Measure the room and mounting position.
2. Mount the board in the final orientation.
3. Start with an ROI smaller than the physical room.
4. Set distance limits in millimeters with xmin, xmax, ymin, ymax, zmin, and zmax.
5. Set approximate angle limits with alrmin, alrmax, adumin, and adumax.
6. Use range to tune when nearby objects are merged as one target.
7. Use response and pthold only after geometry is correct.
8. Validate each boundary with real motion.

Lower pthold values increase sensitivity but also increase noise. The table lists a default of 4 and a setting range that appears as both 3-500 and 4-500. Keep pthold >= 4 unless the installed firmware is explicitly verified for another value.

Distance limits

Set X, Y, and Z bounds in millimeters. Left and right in these views depend on the viewing direction; follow the labeled axes and verify signs after mounting.

Angle limits

Use alrmin/alrmax and adumin/adumax for angle filtering. Command values use the documented 0–180° range; verify the resulting region with real targets.

Static-object detection

Distance-based Modes 1-4 normally prioritize moving objects. The static command enables limited fixed-object detection:

Value	Documented fixed-object distance
0	Disabled
1	1 m
2	2 m
3	3 m
4	4 m
5	5 m

When motion exists, moving targets are output first. Fixed objects are detected only when no moving target is detected. The manual says fixed-object output has Z distance only and no direction information, but it does not define a separate fixed-object packet layout.

caution

Use static detection sparingly The manual warns that enabling static-object detection can continuously report unwanted environmental objects. Test it in the final room and do not infer X/Y direction from a Z-only result.

Detection limitations

• Stationary people may disappear without enough micro-motion unless limited static detection is enabled.
• The manual gives examples rather than guarantees: breathing within about 2 m, conversation within 5 m, keyboard activity within 7 m, and larger motion beyond 7 m.
• Fans, air conditioners, air purifiers, curtains, cables, pets, and metallic clutter can create false or virtual targets.
• A measured person may fluctuate by 20-30 cm even when standing still.
• Targets directly behind another target may be hidden.
• Nearby people may merge into one target, with required separation increasing at longer distance.

Pass criteria

• Reported axis directions match the installed coordinate frame.
• One target crosses each ROI boundary at the measured location.
• Normal and extended packet lengths match the configured output.
• Zone digits change at verified physical boundaries.
• Two separated targets remain distinct at the intended working distance.
• Static-object mode, if used, does not create unacceptable persistent targets.
• Test records include hardware, firmware, enclosure, mounting, room geometry, target conditions, and acceptance thresholds.