Nb Version; Aws/Mqtt Topics; Uplink Data - Milesight EM400-MUD User Manual

5. When the distance is below 20cm or above 80cm, the sensor will send threshold alarm.
Channel
ff 06 (Set Threshold Alarm)
6. Set the height threshold in parking lot mode as 0.03m.
Channel
70 (Set Height Threshold in
ff
7. Set the installation height as 4.5m.
Channel
ff 77 (Set Installation Height)

6.2 NB Version

6.2.1 AWS/MQTT Topics

When the device is connected to AWS/MQTT server, the bi-directional communication uses
different topics.
Topic
em/[SN]/status
em/[SN]/cmd/update
em/[SN]/cmd/update/accepted

6.2.2 Uplink Data

All data are based on following format (HEX):
ff3e 8c c800 2003 0000 0000
Type
ff701e00
Type
Parking Lot Mode)
ff779411
Type
Receive periodic reports, threshold alarms, etc.
Receive success ACK of downlink commands
Note: users need to send downlink command to
Value
CTRL: cc=10 001 100
100=below or above
001=standard mode
10=enable threshold dismiss
report
Min: c8 00 => 00 c8 = 200 mm
= 20 cm
Max: 2003 => 03 20 = 800 mm
= 80cm
Value
1e 00 => 00 1e =30mm =0.03m
Value
94 11 => 11 94 =4500mm =4.5m
Content
Send downlink commands
enable ACK feature first.
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