User Guide

Besides, the device can also be fixed by two M4 mounting screws and wall plugs.

Installation Note:

 In order to provide the best data transmission, please ensure the device is deployed within

the signal range of the LoRaWAN

gateway and keep it away from metal objects and

obstacles.

 The device must be placed in a horizontal position above the detected object so that it has a

clear path to the object.

 The device should be installed at least 30cm away from the side-wall without obstructions

blocking the ultrasonic signal If the device needs to be installed on the side wall, please

ensure the ultrasonic horn is away from the side wall.

 Do not install the ultrasonic sensor above the influent stream to ensure the measured

surface rather than the incoming stream.

5. Device Payload

All data are based on following format (HEX):

Channel1

Type1

Data1

Channel2

Type2

Data2

Channel 3

...

1 Byte

N Bytes

1 Byte

M Bytes

1 Byte

...

For decoder examples please find files on https://github.com/Milesight-IoT/SensorDecoders.

5.1 Basic Information

EM400-UDL reports basic information of sensor whenever it joins the network.

Channel

Type

Description