Milesight WS303 Mini Leak Detection Sensor User Guide

Mini Leak Detection Sensor
Featuring LoRaWAN®
WS303
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 remodeled in any way.
• In order to protect the security of the device, please change the device password when first configuration. The default password is 123456.
• 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 electronic components do not drop out of the enclosure while opening.
• When installing the battery, please install it accurately, and do not install the inverse or wrong model.
• The device must never be subjected to shocks or impacts.

Revision History

Product Introduction

1.1 Overview
WS303 is a tiny and mighty leakage detection sensor for detecting the presence of water leaks and transmitting an alarm using LoRaWAN® technology. With this low power consumption technology, WS303 can work up to 5 years with a 590mAh battery. Compliant with Milesight D2D protocol, it can directly link with other Milesight devices to realize danger prevention and effectively prevent unnecessary loss.
The wire-free WS303 can be easily used in smart offices, buildings, and houses. Users can receive real-time alarms via a built-in buzzer locally and a mobile App remotely. Combining with Milesight LoRaWAN® gateway and Milesight IoT Cloud, users can manage all sensor data remotely and visually.

1.2 Features

• Detect the presence of conductive liquids using a small water probe
• A replaceable built-in 590mAh battery with up to 5 years of life for wire-free power supply
• IP67 waterproof enclosure for harsh environment applications
• Embedded with a buzzer for real-time alarming
• Support Milesight D2D protocol to enable ultra-low latency and direct control without gateways
• Equipped with NFC for easy configuration
• Compliant with standard LoRaWAN® gateways and network servers
• Quick and easy management with Milesight IoT Cloud solution

Hardware Introduction

2.1 Packing List

**** If any of the above items are missing or damaged, please contact your sales representative.

2.2 Hardware Overview

2.3 Dimensions (mm)

2.4 Reset Button & Buzzer Patterns
WS303 sensor equips with a reset button inside the device for emergency reset or reboot even if the battery is removed. Usually, users can use NFC to complete all steps.

second
Reset to Factory Default| Press and hold the button for more than 10 seconds.| Buzzes for every 0.5 second
Alarm| Detect the leakage| After buzzing five times, the device will buzz for 5 minutes or until the leakage status has been released. (The buzzer can also be stopped via ToolBox App or downlink command)

Power Supply

1. Put the coin (or any other tool with a suitable size) into the groove of the battery back cover, turn the battery back cover and remove it.
2. Insert the battery into the sensor with the positive facing up. After inserting, the device will power on automatically.
3. Put the battery cover back onto the device and tighten it.

Operation Guide

4.1 NFC Configuration
WS303 can be configured via NFC.

1. Download and install “Milesight ToolBox” App from Google Play or App Store.
2. Enable NFC on the smartphone and open“Milesight ToolBox” App.
3. Attach the smartphone with NFC area to the device to read the basic information.
4. 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 App.
   In order to protect the security of devices, password validation is required when configuring via an unused phone. The default password is 123456.

Note:

1. Ensure the location of the smartphone NFC area and it’s recommended to take off the phone case.
2. If the smartphone fails to read/write configurations via NFC, keep the phone away and back to try again.
3. WS303 can also be configured by a dedicated NFC reader provided by Milesight IoT.

4.2 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.

port is 85.
Join Type| OTAA and ABP modes are available.
Application Key| Appkey 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| Appskey for ABP mode, default is 5572404C696E6B4C6F52613230313823.
LoRaWAN Version| V1.0.2 and V1.0.3 are available.
Work Mode| It’s fixed as Class A.
RX2 Data Rate| RX2 data rate to receive downlinks or send D2D commands.
RX2 Frequency| RX2 frequency to receive downlinks or send D2D commands. Unit: Hz
Channel Mode| Select Standard-Channel mode or Single-Channel mode. When Single-Channel mode is enabled, only one channel can be selected to send uplinks. Please enable Single-Channel mode if you connect the device to DS7610.
Channel| Enable or disable the frequency to send uplinks.

If the frequency is one of CN470/AU915/US915, enter the index of the channel that you want to enable and make 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

Spread Factor| If ADR is disabled, the device will send data via this spread factor.
Confirmed Mode| If the device does not receive an ACK packet from the network server, it will
resend data once.
Rejoin Mode| Reporting interval ≤ 30 mins: the device will send a specific number of LinkCheckReq MAC packets to the network server every 30 mins to validate connectivity; if there is no response, the device will rejoin the network.
Reporting interval > 30 mins: the device will send a specific number of LinkCheckReq MAC packets to the network server every reporting interval to validate connectivity; if there is no response, the device will rejoin the network.
Set the number of packets sent| When rejoin mode is enabled, set the number of LinkCheckReq packets sent.
ADR Mode| Allow the network server to adjust datarate of the device. This only works with Standard Channel Mode.
Tx Power| Transmit power of the device.

Note:

1. Please contact sales for the device EUI list if there are many units.
2. Please contact sales if you need random App keys before purchase.
3. Select OTAA mode if you use Milesight IoT Cloud to manage devices.
4. Only OTAA mode supports rejoin mode.

4.3 Basic Settings
Go to Device > Setting > General Settings to change the reporting interval, etc.

server. Range: 1~1080mins; Default: 1080mins
Buzzer| Enable or disable the buzzer for alarming when the sensor detects leakage. The buzzer will automatically stop after 5 minutes or the status returns to “No Leak”.
Change Password| Change the password for ToolBox App or software to read/write this device.

4.4 Advanced Settings
4.4.1 Alarm Settings
Go to Device > Settings > Alarm Settings to enable the alarm settings. When WS303 detects water leakage, it will report the alarm according to reporting interval and reporting times settings.

1min
Alarm Reporting Times| The times of reporting alarm packet. Range: 2~1000; Default: 2

4.4.2 Milesight D2D Settings
Milesight D2D protocol is developed by Milesight and used for setting up transmission among Milesight devices without gateway. When the Milesight D2D setting is enabled, WS303 can work as a Milesight D2D controller to send control commands to trigger Milesight D2D agent devices.

1. Configure RX2 datarate and RX2 frequency in LoRaWAN® settings, it is suggested to change the default value if there are many LoRaWAN devices around.
2. Go to Device >Settings > D2D Settings to enable D2D function, and define a unique Milesight D2D key which is the same as Milesight D2D agent devices, then select the frequency and spreading factor. (Default Milesight D2D Key: 5572404C696E6B4C6F52613230313823)
3. Enable one of WS303 statuses and configure a 2-byte hexadecimal command (This command is pre-defined in Milesight D2D agent device). When WS303 detects this status, it will send the control command to the corresponding Milesight D2D agent devices.

Note: If you enabled LoRa Uplink feature, LoRaWAN® uplink that contains the Leakage status will be sent to the gateway after Milesight D2D control command is sent.

4.5 Maintenance
4.5.1 Upgrade

1. Download firmware from Milesight website to your smartphone.
2. Open Toolbox App, go to Device > Maintenance and click Browse to import firmware and upgrade the device.

Note:

1. Operation on ToolBox is not supported during a firmware upgrade.
2. Only the Android version of ToolBox supports the upgrade feature.

4.5.2 Backup
WS303 supports configuration backup for easy and quick device configuration in bulk. Backup is allowed only for devices with the same model and LoRaWAN® frequency band.

1. Go to Template page on the App and save the current settings as a template. You can also edit the template file.
2. Select one template file which saved in the smartphone and click Write, then attach the smartphone to another device to write the configuration.

Note: Slide the template item left to edit or delete the template. Click the template to edit the configurations.

4.5.3 Reset to Factory Default
Please select one of the following methods to reset the device:
Via Hardware: Hold on the power button (internal) for more than 10s.
Via ToolBox App: Go to Device > Maintenance to click Reset, then attach the smartphone with NFC area to the device to complete reset.

Installation

Fixed by 3M Tape:
Paste 3M tape to the back cover, then tear off the other side and place it on the wall near the detection area (please make sure the two leak detection probe is straight down).

Placement Installation:
Place the sensor facing up and horizontally in the detection area.

Device Payload

All data are based on the following format (HEX), the Data field should follow little-endian:

6.1 Basic Information
WS303 reports basic information about the sensor every time it joins the network.

ff0bff ff0101 ff166993c52763220003 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)| 6993c52763
220003| 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

6.2 Sensor Data
WS303 reports sensor data according to reporting interval (1080mins by default) or leakage status changes.

01: Leaking detected

Example:

1. Periodic Packet
   017563 030001

   Channel| Type| Value| Channel| Type| Value
   01| 75 (Battery)| 63 => 99%| 03| 00 (Leakage Status)| 01=>Leaking detected

2. Alarm Packet:
   030001

   Channel| Type| Value
   03| 00 (Leakage Status)| 01=> Leaking detected

6.3 Downlink Commands
WS303 supports downlink commands to configure the device. The application port is 85 by default.

ff

| 10 (Reboot)| ff (Reserved)
03 (Set Reporting Interval)| 2 Bytes, unit: s
3e (Set Buzzer)| 00 = Disable; 01 = Enable
3d (Stop Buzzing)| ff (Reserved)
7e (Set Alarming Reporting)| 5 Bytes,
Alarm Reporting(1 Byte)+Interval(2 Bytes)+ Times(2 Bytes)
Alarm Reporting: 00 = Disable; 01 = Enable Alarm Reporting Interval: unit –s
Alarm Reporting Times: range –2~1000
7f (Set Searching Device)| 00 = Not Search; 01 = Search
Note:
1. The device will buzz for a specific time after receiving this downlink command.
2. You can stop the buzzer on ToolBox or by sending the not search downlink command.
3. Disabling the buzzer on Toolbox will not stop the buzzing under searching device feature.
80 (Set Buzzing Time when Searching)| 2 Bytes, unit:s Range: 60~64800; Default: 300s
84 (Set D2D Function)| 00=Disable; 01=Enable
81 (Set LoRa Uplink)| 2 Bytes, Status(1 Byte)+Function(1 Byte)
Status: 00=No Leak; 01=Leak
Function:
00 -Only Use LoRaWAN 01 -Only Use D2D
03 -Use D2D&LoRaWAN Uplink
83 (Set D2D Command)| 3 Bytes, Status(1 Byte)+Command(2 Bytes) Status: 00=No Leak; 01=Leak

Example:

1. Set reporting interval as 20 minutes.
   ff03b004

   Channel| Type| Value
   ff| 03 (Set Reporting Interval)| b0 04 => 04 b0 = 1200s = 20 minutes

2. Reboot the
   ff10ff

   Channel| Type| Value
   ff| 10 (Reboot)| ff (Reserved)

3. Enable buzzer for leakage alarming.
   ff3e01

   Channel| Type| Value
   ff| 3e (Set Buzzer)| 01=>Enable

4. Stop buzzing when WS303 detects water leakage.
   ff3dff

   Channel| Type| Value
   ff| 3d (Stop Buzzing)| ff (Reserved)

5. Enable alarming reporting, set the interval as 10 minutes and set the reporting times as 3.
   ff7e 01 5802 0300

   Channel| Type| Value
   ff| 7e (Set Alarm Reporting)| 01=> Enable Alarm Reporting
   58 02 => 02 58 = 600s = 10 minutes
   03 00 => 00 03 =3

6. Enable D2D function.
   ff8401

   Channel| Type| Value
   ff| 84 (Set D2D Function)| 01 => Enable

7. Set leak status using both D2D&LoRa uplink.
   ff81 01 03

   Channel| Type| Value
   ff| 81 (Set LoRa Uplink)| Status: 01=> Leak
   Function: 03=> Use D2D & LoRa

8. Set the D2D command of leak as 0101.
   ff83 01 0101

   Channel| Type| Value
   ff| 83 (Set D2D Command)| Status: 01=> Leak
   Command: 0101

Declaration of Conformity
WS303 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.

Revision History

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

References

• Support : IoT Support
• GitHub - Milesight-IoT/SensorDecoders

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