netvox R718F2 Wireless 2-Gang Reed Switch Open/Close Detection Sensor User Manual
netvox R718F2 Wireless 2-Gang Reed Switch Open/Close Detection Sensor

Introduction

R718F2 is a long-distance door Sensor based on the LoRaWAN open protocol (Class A). The device is equipped with 2-gang reed sensors, The reed switch is on (conducting) within the magnetic range, and is off (non conducting) when it’s out of the magnetic range. The module can detect the closing and opening signals so that the state of the door window status can be detected.

LoRa Wireless Technology: 

LoRa is a wireless communication technology famous for its long-distance transmission and low power consumption. Compared with other communication methods, LoRa spread spectrum modulation technique greatly extend the communication distance. It can be widely used in any use case that requires long-distance and low-data wireless communications. For example, automatic meter reading, building automation equipment, wireless security systems, industrial monitoring. It has features like small size, low power consumption, long transmission distance, strong anti-interference ability and so on

LoRaWAN: 

LoRaWAN uses LoRa technology to define end-to-end standard specifications to ensure interoperability between devices and gateways from different manufacturers.

Appearance

Product Overview

Main Features

  • Compatible with LoRaWAN
  • 2 ER14505 lithium batteries (3.6V / cell) in parallel
  • 2-gang reed switch detection
  • The base is attached with a magnet that can be attached to a ferromagnetic material object
  • Protection level: IP65 / IP67 (optional)
  • Compatible with LoRaWANTM Class A
  • Using frequency hopping spread spectrum technology
  • Configurable parameters via third-party software platform, reading data and setting alarms via SMS text and email (optional)
  • Available for third-party platforms: Actility / ThingPark, / TTN / MyDevices / Cayenne
  • Improved power management for longer battery life

Battery Life:
⁻Please refer to web: http://www.netvox.com.tw/electric/electric_calc.html

Set up Instruction

On/Off
Power on Insert batteries. (users may need a flat blade screwdriver to open)
Turn on Press and hold the function key for 3 seconds till the green indicator flashes once.
Turn off

 (Restore to factory setting)

Press and hold the function key for 5 seconds till green indicator flashes for 20 times.
Power off Remove Batteries.
Note
  1. Remove and insert the battery; the device is at off state by default.
  2. On/off interval is suggested to be about 10 seconds to avoid the interference of capacitor inductance and other energy storage components.
  3. At 1st -5th second after power on, the device will be in engineering test mode.
Network Joining
Never joined the network Turn on the device to search the network to join.

The green indicator stays on for 5 seconds: success The green indicator remains off: fail

Had joined the network (not at factory setting) Turn on the device to search the previous network to join. The green indicator stays on for 5 seconds: success
The green indicator remains off: fail
Function Key
Press and hold for 5 seconds Restore to factory setting / Turn off

The green indicator flashes for 20 times: success The green indicator remains off: fail

Press once The device is in the network: green indicator flashes once and sends a report

 The device is not in the network: green indicator remains off

Sleeping Mode
The device is on and in the network Sleeping period: Min Interval.
When the reportchange exceeds setting value or the state changes: send a data report according to Min Interval.

Low Voltage Warning

Low Voltage 3.2V

Data Report

The device will immediately send a version packet report along with an uplink packet including reed switch status and battery voltage.

The device sends data in the default configuration before any configuration is done.

Default setting: 

  • MaxTime: Max Interval = 60 min = 3600s
  • MinTime: Min Interval = 60 min = 3600s
  • BatteryChange: 0x01 (0.1V)

Reed switch trigger status: 

When the magnet closes to the reed switch, it will report the status “0”
*The distance between the magnet and the reed switch is less than 2 cm

When the magnet removes the reed switch, it will report the status “1”
*The distance between the magnet and the reed switch is greater than 2 cm

Note: 

The device report interval will be programmed based on the default firmware which may vary.
The interval between two reports must be the minimum time.

Please refer Netvox LoRaWAN Application Command document and Netvox Lora Command Resolver http://loraresolver.netvoxcloud.com:8888/page/index to resolve uplink data.

Data report configuration and sending period are as following: 

Min Interval (Unit:second) Max Interval (Unit:second) Reportable Change Current Change≥ Reportable Change Current Change< Reportable Change
Any number between 1~65535 Any number between 1~65535 Can not be 0. Report per Min Interval Report per Max Interval

Example of ConfigureCmd 

FPort:0x07

Bytes 1 1 Var (Fix =9 Bytes)

CmdID– 1 byte
DeviceType– 1 byte – Device Type of Device
NetvoxPayLoadData– var bytes (Max=9bytes)

Description Device CmdID Device Type NetvoxPayLoadData
ConfigReport Req R718F2 0x01 0x3E MinTime (2bytes Unit: s) MaxTime (2bytes Unit: s) BatteryChange (1byte Unit: 0.1v) Reserved (4Bytes, Fixed 0x00)
ConfigReport

Rsp

0x81 Status (0x00_success) Reserved (8Bytes, Fixed 0x00)
ReadConfig ReportReq 0x02 Reserved (9Bytes, Fixed 0x00)
ReadConfig ReportRsp 0x82 MinTime (2bytes Unit: s) MaxTime (2bytes Unit: s) BatteryChange (1byte Unit: 0.1v) Reserved (4Bytes, Fixed 0x00)
  1. Configure device parameters MinTime = 1min, MaxTime = 1min, BatteryChange = 0.1v
    Downlink: 013E003C003C0100000000
    Device returns:
    813E000000000000000000 (configuration successful)
    813E010000000000000000 (configuration failed)
  2. Read device parameters
    Downlink: 023E000000000000000000
    Device returns:
    823E003C003C0100000000 (current configuration parameters)

Example for MinTime/MaxTime logic: 

Example#1 based on MinTime = 1 Hour, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange=0.1V

Graph

Note: MaxTime=MinTime. Data will only be report according to MaxTime (MinTime) duration regardless BatteryVoltageChange value.

Example#2 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.

Graph

Example#3 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.

Graph

Notes

  1. The device only wakes up and performs data sampling according to MinTime Interval. When it is sleeping, it does not collect data.
  2. The data collected is compared with the last data reported. If the data variation is greater than the ReportableChange value, the device reports according to MinTime interval. If the data variation is not greater than the last data reported, the device reports according to MaxTime interval.
  3. We do not recommend to set the MinTime Interval value too low. If the MinTime Interval is too low, the device wakes up frequently and the battery will be drained soon.
  4. Whenever the device sends a report, no matter resulting from data variation, button pushed or MaxTime interval, another cycle of MinTime/MaxTime calculation is started.

Installation

  1. R718F2 has a built-in magnet (as the figure below). When installed, it can be attached to the surface of an object with iron which is convenient and quick.
    To make the installation more secure, use screws (purchased separately) to secure the unit to a wall or other surface (as the figure below)
    Note:
    Do not install the device in a metal shielded box or in an environment with other electrical equipment around it to avoid affecting the wireless transmission of the device.
    Installation
    Installation
  2. Tear off the 3M glue at the bottom of the reed switch probe and the magnet (as the red frame in the figure above). Then, stick the reed switch probe to the door and is parallel to the magnet (as the figure on the right).
    Note: The installation distance between the reed switch probe and the magnet should be less than 2cm.
  3. When the door or window is opened, the reed switch probe is separated from the magnet, and the device sends an alarm message about the opening

When the door or window is closed, the reed switch probe and the magnet get closer, and the device restores to the normal state and sends a state message about the closing.

R718F2 is suitable below scenarios: 

  • Door, window
  • Machine room door
  • Archives
  • Closet
  • Refrigerators and freezers
  • Cargo ship hatch
  • Garage door
  • Public toilet door

The place needs to detect the opening and closing status.

Reed Switch

When installing the device, the magnet must move along the X axis relative to the sensor.

Installing the device

If the magnet moves along the Y axis relative to the sensor, it will cause repeated reports due to the magnetic field.

Magnet moves

Note: 

Please do not disassemble the device unless it is required to replace the batteries.

Do not touch the waterproof gasket, LED indicator light, function keys when replacing the batteries. Please use suitable screwdriver to tighten the screws (if using an electric screwdriver, it is recommended to set the torque as 4kgf) to ensure the  device is impermeable.

Information about Battery Passivation

Many of Netvox devices are powered by 3.6V ER14505 Li-SOCl2 (lithium thionyl chloride) batteries that offer many advantages including low self-discharge rate and high energy density.

However, primary lithium batteries like Li-SOCl2 batteries will form a passivation layer as a reaction between the lithium anode and thionyl chloride if they are in storage for a long time or if the storage temperature is too high. This lithium chloride layer prevents rapid self-discharge caused by continuous reaction between lithium and thionyl chloride, but battery passivation may also lead to voltage delay when the batteries are put into operation, and our devices may not work correctly in this situation.

As a result, please make sure to source batteries from reliable vendors, and the batteries should be produced within the last three months.

If encountering the situation of battery passivation, users can activate the battery to eliminate the battery hysteresis.

To determine whether a battery requires activation

Connect a new ER14505 battery to a 68ohm resistor in parallel, and check the voltage of the circuit. If the voltage is below 3.3V, it means the battery requires activation.

How to activate the battery

  • a. Connect a battery to a 68ohm resistor in parallel
  • b. Keep the connection for 6~8 minutes
  • c. The voltage of the circuit should be ≧3.3V

Important Maintenance Instruction

The device is a product with superior design and craftsmanship and should be used with care.

The following suggestions will help you use the warranty service effectively.

  • Keep the equipment dry. Rain, moisture and various liquids or water may contain minerals that can corrode electronic circuits. In case the device is wet, please dry it completely.
  • Do not use or store in dusty or dirty areas. This way can damage its detachable parts and electronic components.
  • Do not store in excessive heat place. High temperatures can shorten the life of electronic devices, destroy batteries, and deform or melt some plastic parts.
  • Do not store in excessive cold place. Otherwise, when the temperature rises to normal temperature, moisture will form inside which will destroy the board.
  • Do not throw, knock, or shake the device. Treating equipment roughly can destroy internal circuit boards and delicate structures.
  • Do not wash with strong chemicals, detergents, or strong detergents.
  • Do not paint the device. Smudges can make debris block detachable parts up and affect normal operation.
  • Do not throw the battery into the fire to prevent the battery from exploding. Damaged batteries may also explode.

All the above suggestions apply equally to your device, batteries, and accessories.
If any device is not operating properly.
Please take it to the nearest authorized service facility for repairing.

 

Documents / Resources

netvox R718F2 Wireless 2-Gang Reed Switch Open/Close Detection Sensor [pdf] User Manual
R718F2, Wireless 2-Gang Reed Switch Open, Close Detection Sensor

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