Milesight EM400-UDL Ultrasonic Distance Sensor User Guide
- June 10, 2024
- Milesight
Table of Contents
BETTER INSIDE, MORE IN SIGHT
EM400-UDL Ultrasonic Distance Sensor
Featuring LoRaWAN®
User Guide
Safety Precautions
Milesight will not shoulder responsibility for any loss or damage resulting from not following the instructions of this operating guide.
- The device must not be disassembled or remodelled in any way.
- In order to protect the security of the device, please change the device password when first configuration. Default password is 123456.
- The device is not intended to be used as a reference sensor, and Milesight won’t should responsibility for any damage which may result from inaccurate readings.
- Do not place the device close to objects with naked flames.
- Do not place the device in where the temperature is below/above the operating range.
- Make sure both batteries are newest when install, or battery life will be reduced.
- The device must never be subjected to shocks or impacts.
Declaration of Conformity
EM400-UDL is in conformity with the essential requirements and other relevant
provisions of the CE, FCC, and RoHS.
Copyright © 2011-2023 Milesight. All rights reserved.
All information in this guide is protected by copyright law. Whereby, no organization or individual shall copy or reproduce the whole or part of this user guide by any means without written authorization from Xiamen Milesight IoT Co., Ltd.
For assistance, please contact
Milesight technical support:
Email: iot.support@milesight.com
Support Portal: support.milesight-iot.com
Tel: 86-592-5085280
Fax: 86-592-5023065
Address: Building C09, Software Park III,
Xiamen 361024, China
Revision History
| Date | Doc Version | Description |
|---|---|---|
| 16-Mar-23 | V 1.0 | Initial version |
Product Introduction
1.1 Overview
EM400-UDL is a designed non-contact ultrasonic distance sensor featuring
LoRaWAN®. With this low power consumption technology, EM400-UDL can work up to
10 years with two 9000 mAh batteries. With multiple probes optional and
different detecting ranges, it can satisfy different requirements.
With high protection IP rating and waterproof enclosure, EM400-UDL is widely
used for outdoor applications such as water level, fill level of tanks and
silos, presence of objects or snow level.
Combining with Milesight LoRaWAN®gateway and Milesight IoT Cloud solution,
users can manage all sensor data remotely and visually.
1.2 Features
- Optional probes vary from 25 to 1000 cm for multiple applications
- Equipped with NTC Thermistor for the detection and alarm of burning
- Built-in 3-axis accelerometer sensor to monitor device tilt status
- Damp-proof coating inside and IP67 waterproof enclosure for outdoor applications
- Built-in two 9000 mAh replaceable batteries and work for 10 years without replacement
- Ultra-wide-distance wireless transmission up to line of sight of 15 km
- Equipped with NFC for one touch configuration, support card emulation mode
- Function well with standard LoRaWAN® gateway and network servers
- Compatible with Milesight IoT Cloud
Hardware Introduction
2.1 Packing List
1 × EM400-UDL Device| 2 × Mounting Kits| 1 × Warranty Card| 1 × Quick Guide
If any of the above items is missing or damaged, please contact your sales
representative.
2.2 Hardware Overview
2.3 Dimensions (mm)
2.4 Power Button
EM400-UDL can be switched on/off via NFC. Besides, users can use power button
to switch on/off and reset the device manually.
| Function | Action | LED Indication |
|---|---|---|
| Switch On | Press and hold the button for more than 3 seconds. | Off → On |
| Switch Off | Press and hold the button for more than 3 seconds. | On → Off |
| Reset | Press and hold the button for more than 10 seconds. | Quickly Blinks |
| Check On/Off Status | Quickly press the power button. | Light On: Device is |
on
Light Off: Device is off
Operation Guide
3.1 NFC Configuration
EM400-UDL can be configured via NFC.
- Download and install “Milesight ToolBox” App from Google Play or App Store.
- Enable NFC on the smartphone and open “Milesight ToolBox” App.
- Attach the smartphone with NFC area to the device to read the basic information.
- Basic information and settings of devices will be shown on ToolBox if it’s recognized successfully. You can switch on/off, read and write the device by tapping the button on the Apps. In order to protect the security of devices, password validation is required when configuring via unused phone. Default password is 123456.
Note:
- Ensure the location of smartphone NFC area and it’s recommended to take off phone case.
- If the smartphone fails to read/write configurations via NFC, keep the phone away and back to try again.
- EM400-UDL can also be configured by dedicated NFC reader provided by Milesight IoT or you can configure it via TTL interface inside the device.
3.2 LoRaWAN Settings
LoRaWAN settings is used for configuring the transmission parameters in
LoRaWAN® network.
Basic LoRaWAN Settings:
Go to Device > Setting > LoRaWAN Settings of ToolBox App to configure join
type, App EUI, App Key and other information. You can also keep all settings
by default.
| Parameters | Description |
|---|---|
| Device EUI | Unique ID of the device which can also be found on the label. |
| App EUI | Default App EUI is 24E124C0002A0001. |
| Application Port | The port used for sending and receiving data, default port |
is 85.
Join Type| OTAA and ABP mode are available.
Application Key| App key for OTAA mode, default is
5572404C696E6B4C6F52613230313823.
Device Address| DevAddr for ABP mode, default is the 5th to 12th digits of SN.
Network Session Key| Nwkskey for ABP mode, default is
5572404C696E6B4C6F52613230313823.
Application Session Key| Apps key for ABP mode, default is
5572404C696E6B4C6F52613230313823.
LoRaWAN Version| V1.0.2, V1.0.3 are available.
Work Mode| It’s fixed as Class A.
RX2 Data Rate| RX2 data rate to receive down links.
RX2 Frequency| RX2 frequency to receive down links. Unit: Hz
Spread Factor| If ADR is disabled, the device will send data via this spread
factor.
Confirmed Mode| If the device does not receive ACK packet from network server,
it will resend data once.
Rejoin Mode| Reporting interval ≤ 30 mins: the device will send a specific
number of Link Check Req MAC packets to the network server every 30 mins to
validate connectivity; if there is no response, the device will re-join the
network.
Reporting interval > 30 mins: the device will send a specific number of Link
Check Req MAC packets to the network server every reporting interval to
validate connectivity; if there is no response, the device will re-join the
network.
Set the number of packets sent| When rejoin mode is enabled, set the number of
Link Check Req packets sent.
ADR Mode| Allow network server to adjust data rate of the device.
Tx Power| Transmit power of device.
Note:
- Please contact sales for device EUI list if there are many units.
- Please contact sales if you need random App keys before purchase.
- Select OTAA mode if you use Milesight IoT cloud to manage devices.
- Only OTAA mode supports rejoin mode.
LoRaWAN Frequency Settings:
Go to Setting > LoRaWAN Settings of ToolBox App to select supported frequency
and select channels to send up links. Make sure the channels match the
LoRaWAN® gateway.
If frequency is one of CN470/AU915/US915, you can enter the index of the
channel that you want to enable in the input box, making them separated by
commas.
Examples:
1, 40: Enabling Channel 1 and Channel 40
1-40: Enabling Channel 1 to Channel 40
1-40, 60: Enabling Channel 1 to Channel 40 and Channel 60
All: Enabling all channels
Null: Indicates that all channels are disabled
3.3 Basic Settings
Go to Device > Setting > General Settings to change the reporting interval,
etc.
| Parameters | Description |
|---|---|
| Reporting Interval | Reporting interval of transmitting data to network server. |
Default: 10 mins
Tilt & Distance Switch| When detecting that the offset angle is greater than
20 degrees, turn off the distance sensor.
Change Password| Change the password for ToolBox App or software to access
this device.
3.4 Advanced Settings
3.4.1 Calibration Settings
Go to Device > Settings > Calibration Settings to enable calibration.
EM400-UDL supports two calibration types.
- Numerical Calibration: users can define calibration value to correct every distance.
- Measure Outlier Calibration: users can define either outlier range or value. When the device distance value exceeds the outlier range (or range) comparing to last value, the device will measure the distance again.
3.4.2 Threshold Settings
Go to Device > Setting > Threshold Settings to enable the threshold settings
and input the distance threshold. EM400-UDL will detect whether the distance
reaches the threshold according to collecting interval. If threshold is
triggered, it uploads the current data once instantly.
| Parameters | Description |
|---|---|
| Collecting Interval | Collecting 1~1080 min interval of ultrasonic sensor to |
detect distance. Range:
Threshold Dismiss Report| When the collected value changes from outside the
threshold to within the threshold, a threshold release packet will be
reported.
3.5 Maintenance
3.5.1 Upgrade
- Download firmware from Milesight website to your smartphone.
- Open Toolbox App, go to Device > Maintenance and click Browse to import firmware and upgrade the device.
Note:
- Operation on ToolBox is not supported during a firmware upgrade.
- Only Android version ToolBox supports the upgrade feature.
3.5.2 Backup
EM400-UDL support configuration backup for easy and quick device configuration
in bulk.
Backup is allowed only for devices with the same model and LoRaWAN® frequency
band.
- Go to Template page on the App and save current settings as a template. You can also edit the template file.
- Select one template file which saved in the smartphone and click Write, then attach to another device to write configuration.
Note: Slide the template item left to edit or delete the template. Click the template to edit the configurations.
3.5.3 Reset to Factory Default
Please select one of following methods to reset device:
Via Hardware: Hold on power button (internal) for more than 10s.
Via ToolBox App: Go to Device > Maintenance to click Reset, then attach
smartphone with NFC area to device to complete reset.
Installation
- Drill two holes on the container cover according to the location of device mounting holes.
- Put the device under container cover and align the holes in order to perfectly screw the bolts into the holes from the other side of the cover.
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 in fluent stream to ensure the measured surface rather than the incoming stream.
Device Payload
All data are based on following format (HEX):
Channel 1| Type 1| Data 1| Channel 2| Type 2| Data
2| Channel 3| …
---|---|---|---|---|---|---|---
1 Byte| 1 Byte| N Bytes| 1 Byte| 1 Byte| M Bytes| 1 Byte| …
5.1 Basic Information
EM400-UDL reports basic information of sensor whenever it joins the network.
| Channel | Type | Description |
|---|---|---|
| ff | 01(Protocol Version) | 01=>V1 |
| 09 (Hardware Version) | 01 40 => V1.4 | |
| 0a (Software Version) | 01 14 => V1.14 | |
| 0b (Power On) | Device is on | |
| 0f (Device Type) | 00: Class A, 01: Class B, 02: Class C | |
| 16 (Device SN) | 16 digits |
Example:
ff0bff ff0101 ff166329c42903640033 ff090100 ff0a0101 ff0f00
Channel| Type| Value| Channel| Type| Value
ff| 0b (Power On)| ff (Reserved)| ff| 01(Protocol Version)| 01 (V1)
Channel| Type| Value| Channel| Type| Value
ff| 16 (Device SN)| 6329c42903640033| ff| 09 (Hardware version)| 0100 (V1.0)
Channel| Type| Value| Channel| Type| Value
ff| 0a (Software version)| 0101 (V1.1)| ff| 0f (Device Type)| 00 (Class A)
5.2 Sensor Data
EM400-UDL reports sensor data according to reporting interval (10 mins by
default).
| Channel | Type | Description |
|---|---|---|
| 01 | 75(Battery Level) | UINT8, Unit: % |
| 03 | 67 (Temperature) | INT16, Unit: °C |
| 04 | 82 (Distance) | INT16, Unit: mm |
| 05 | 00 (Device Position) | 00: Normal (horizontal offset angle < 20°) |
01: Tilt (horizontal offset angle ≥ 20°)
Example:
017564 0367f800 04820101 050001
Channel| Type| Value| Channel| Type| Value
01| 75 (Battery)| 64 => 100%| 03| 67 (Temperature)| f8 00 => 00 f8
= 248 * 0.1
=24.8 °C
Channel| Type| Value| Channel| Type| Value
04| 82 (Distance)| 01 01 =>
01 01
=257 mm
=0.257 m| 05| 00 (Device Position)| 01=Tilt
Threshold Packet:
When collected distance exceeds threshold, EM400-UDL will report a distance
alarm packet; besides, it will also report a alarm dismiss packet if distance
returns back to normal value. When the abrupt change of temperature is greater
than 5 °C, it will report a temperature alarm packet.
| Channel | Type | Description |
|---|---|---|
| 84 | 82 | |
| (Distance) | 3 Bytes, |
Distance (2 Bytes) + Alarm Status (1 Byte)
Distance: unit — mm
Alarm Status:
00 -Alarm dismiss
01 -Alarm
83| 67
(Temperature)| 3 Bytes,
Temperature (2 Bytes) + Alarm Status (1 Byte)
Temperature: unit — °C
Alarm Status:
00 -Alarm dismiss
01 -Alarm
Example:
-
Distance Threshold
8482330701Channel| Type| Value
84| 82 (Distance)| Distance: 33 07 =>07 33 = 1843 mm = 1.843 m
Alarm Status: 01= Alarm -
Temperature Threshold
8367220101Channel| Type| Value
83| 67 (Temperature)| Temperature: 22 01 =>01 22 = 290 * 0.1 = 29°C
Alarm Status: 01= Alarm
5.3 Down link Commands
EM400-UDL supports downlink commands to configure the device. Application port
is 85 by default.
| Channel | Type | Description |
|---|---|---|
| ff | 10 (Reboot) | ff (Reserved) |
| 03 (Set Reporting Interval) | 2 Bytes, unit: s | |
| 3e (Set Tilt & Distance Switch) | 00 = Disable; 01 = Enable | |
| 06 (Set Threshold Alarm) | 9 Bytes, CTRL(1B)+Min(2B)+Max(2B)+00000000(4B) |
CTRL:
Bit2~Bit0:
000-disable 001-below 010-above 011-within
100-below or above Bit5~Bit3=001 Bit6=0
Bit7:
0 – disable threshold dismiss report 1 – enable threshold dismiss report
Example:
-
Set reporting interval as 20 minutes.
ff03b004Channel| Type| Value
ff| 03 (Set Reporting Interval)| b0 04 => 04 b0 = 1200s = 20 minutes -
Reboot the device.
ff10ffChannel| Type| Value
ff| 10 (Reboot)| ff (Reserved) -
Enable “Tilt & Distance Switch” feature.
ff3e01Channel| Type| Value
ff| 3e (Set Tilt & Distance Switch)| 01 = Enable -
When the distance is below 1 m or above 3 m, the sensor will trigger threshold alarm.
ff06 8c e803 b80b 0000 0000Channel| Type| Value
ff| 06 (Set Threshold Alarm)| CTRL: 8c=10 001 100
100=below or above 10=enable threshold dismiss report Min: e8 03=> 03 e8 =1000mm =1m
Max: b80b => 0b b8 =3000 mm =3m
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