Netvox R311FD Manuel utilisateur

Model：R311FD

Wireless 3-axis Accelerometer Sensor

Wireless 3-axis

Accelerometer Sensor

R311FD

User Manual

This document contains proprietary technical information which is the property of NETVOX Technology. It shall be maintained

in strict confidence and shall not be disclosed to other parties, in whole or in part, without written permission of NETVOX

Technology. The specifications are subject to change without prior notice.

Table of Content

1. Introduction.......................................................................................................................................................................................2

2.Appearance........................................................................................................................................................................................2

3. Main Features ...................................................................................................................................................................................3

4. Set up Instruction............................................................................................................................................................................4

5. Data Report.......................................................................................................................................................................................5

5.1 ActiveThreshold and InActiveThreshold .................................................................................................................................6

5.2 Calibration ................................................................................................................................................................................6

5.3 Example of ConfigureCmd.......................................................................................................................................................7

5.4 Example of MinTime/MaxTime logic......................................................................................................................................9

5.5 The X, Y, Z axis direction of R311FD....................................................................................................................................10

6. Important Maintenance Instruction ................................................................................................................................................11

1. Introduction

R311FD is the LoRaWANTM Class A device which detects three-axis acceleration and is compatible with LoRaWAN protocol.

When the device moves or vibrates over threshold value, it immediately reports the acceleration and velocity of the X, Y, and Z

axes.

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.

2. Appearance

Function Key

Indicator

3. Main Features

Adopt SX1276 wireless communication module

2 sections 3.0V CR2450 button batteries

Detect the three-axis acceleration and velocity of the device and the voltage

Compatible with LoRaWANTM Class A

Frequency hopping spread spectrum technology

Configuration parameters can be configured through third-party software platforms, data can be read and alarms can be set via

SMS text and email (optional)

Available third-party platform: Actility / ThingPark, TTN, MyDevices/Cayenne

Low power consumption and long battery life

Note:

Battery life is determined by the sensor reporting frequency and other variables, please refer to

http://www.netvox.com.tw/electric/electric_calc.html On this website, users can find battery life time for varied models at

different configurations.

4.Set up Instruction

On/Off

Power on Insert batteries. (users may need a screwdriver to open);

(Insert two sections of 3V CR2450 button batteries and close the battery cover.)

Turn on Press any function key, and the indicator flashes once.

Turn off

(Restore to factory setting) Press and hold the function key for 5 seconds, and the green indicator flashes 20 times.

Power off Remove Batteries.

Note:

1. Remove and insert the battery; the device memorizes previous on/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. Press any function key and insert ba

tteries at the same time; it will enter engineer testing mode.

Network Joining

Never joined the network

Turn on the device to search the network.

The green indicator stays on for 5 seconds: success

The green indicator remains off: fail

Had joined the network

Turn on the device to search the previous network.

The green indicator stays on for 5 seconds: success

The green indicator remains off: fail

Fail to join the network Suggest to check the device verification information on the gateway or consult your platform

server provider.

Function Key

Press and hold for 5 seconds

Restore to factory setting / Turn off

The green indicator flashes 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, a data report will be sent

according to Min Interval.

Low Voltage Warning

Low Voltage 2.4V

5. Data Report

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

The device will immediately send a version packet report and two attribute data reports.

Data will be reported by default setting before any configuration.

Default setting:

Max Interval: 3600s

Min Interval: 3600s (The current voltage is detected every Min Interval by default.)

Battery Voltage Change: 0x01 (0.1V)

Acceleration Change: 0x03(m/s²)

R311FD Three-axis acceleration and velocity: s:

1. After the three-axis acceleration of the device exceedsActiveThreshold, a report is sent immediately to report the

three-axis acceleration and velocity.

2. After reporting, the three-axis acceleration of the device needs to be lower than InActiveThreshold, and the duration is

greater than 5s (cannot be modified). Then, the next detection will start. If the vibration continues during this process

after the report is sent, the timing will restart.

3. The device sends two data packets, one is the acceleration of the three axes, and the other is the velocity of the three

axes. The interval between the two packets is 10s.

Note:

(1) The device report interval will be programmed based on the default firmware.

(2) The interval between two reports must be the minimum time.

The reported data is decoded by the Netvox LoRaWAN Application Command document and

http://loraresolver.netvoxcloud.com:8888/page/index

5.1 ActiveThreshold and InActiveThreshold

Formula

Active Threshold/InActiveThreshold = Critical value ÷ 9.8÷ 0.0625

* The gravitational acceleration at standard atmospheric pressure is 9.8 m/s2

* The scale factor of the threshold is 62.5 mg

Active Threshold Active Threshold can be changed by ConfigureCmd

Active Threshold range is 0x0003-0x00FF (default is 0x0003);

InActiveThreshold

InActiveThreshold can be changed by ConfigureCmd

InActiveThreshold range is 0x0002-0x00FF (default is 0x0002)

* Active Threshold and InActiveThreshold can not be the same

Example

Assuming that the critical value is set to be 10m/s2, the Active Threshold would be set

10/9.8/0.0625=16.32

Active Threshold would be set integer as 16.

5.2 Calibration

The accelerometer is a mechanical structure that contains components that can move freely.

These moving parts are very sensitive to mechanical stress, far beyond solid-state electronics.

The 0g offset is an important accelerometer indicator because it defines the baseline used to measure acceleration.

After installing R311FD, users need to let the device rest for 1 minute, and then power on. Then, turn on the device and wait for

the device taking 1 minute to join the network. After that, the device will automatically executes the calibration.

After calibration, the reported three-axis acceleration value will be within 1m/s2.

When the acceleration is within 1m/s2and thevelocity is within 160mm/s, it can be judged that the device is stationary.

5.3 Example of ConfigureCmd

FPort：0x07

Bytes 1 1 Var (Fix =9 Bytes)

CmdID DeviceType NetvoxPayLoadData

CmdID– 1 byte

DeviceType– 1 byte – Device Type of Device

NetvoxPayLoadData– var bytes (Max=9bytes)

(1)Command Configuration:

MinTime = 1min, MaxTime = 1min, BatteryChange = 0.1v, Acceleratedspeedchange = 1m/s²

Downlink：01C7003C003C0100010000 003C(Hex) = 60(Dec)

Response：

81C7000000000000000000（Configuration success）

81C7010000000000000000（Configuration failure）

(2)Read Configuration:

Downlink：02C7000000000000000000

Response：

82C7003C003C0100010000（Current configuration）

Description

Device Cmd

Device

Type NetvoxPayLoadData

Config

ReportReq

R311FD

0x01

0xC7

MinTime

(2bytes Unit:s)

MaxTime

(2bytes Unit:s)

BatteryChange

(1byte Unit:0.1v)

Acceleration

Change

(2byte Unit:m/s2)

Reserved

(2Bytes,Fixed

0x00)

Config

ReportRsp 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)

Acceleration

Change

(2byte Unit:m/s2)

Reserved

(2Bytes,Fixed

0x00)

Assuming that the ActiveThreshold is set to 10m/s2, the value to be set is 10/9.8/0.0625=16.32, and the last value obtained is an

integer and is configured as 16.

Assuming that the InActiveThreshold is set to 8m/s2, the value to be set is 8/9.8/0.0625=13.06, and the last value obtained is an

integer and is configured as 13.

(3)Configure device parameters ActiveThreshold=16, InActiveThreshold=13

Downlink: 03C70010000D0000000000 0010(Hex) = 16(Dec) , 000D(Hex) = 13(Dec)

Response：

83C7000000000000000000 (configuration is successful)

83C7010000000000000000 (configuration failed)

(4)Read device parameters

Downlink: 04C7000000000000000000

Response: 84C70010000D0000000000 (device current parameter)

Description Device Cmd

Device

Type NetvoxPayLoadData

SetActive

ThresholdReq

R311FD

0x03

0xC7

ActiveThreshold

(2Bytes)

InActiveThreshold

(2Bytes)

Reserved

(5Bytes,Fixed 0x00)

SetActive

ThresholdRsp 0x83 Status

(0x00_success)

Reserved

(8Bytes,Fixed 0x00)

GetActive

ThresholdReq 0x04 Reserved

(9Bytes,Fixed 0x00)

GetActive

ThresholdRsp 0x84 ActiveThreshold

(2Bytes)

InActiveThreshold

(2Bytes)

Reserved

(5Bytes,Fixed 0x00)

SetRestore

ReportReq 0x07

RestoreReportSet (1byte,

0x00_DO NOT report when sensor restore;

0x01_DO report when sensor restore)

Reserved

(8Bytes, Fixed 0x00)

SetRestore

ReportRsp 0x87 Status

(0x00_success)

Reserved

(8Bytes, Fixed 0x00)

GetRestore

ReportReq 0x08 Reserved

(9Bytes,Fixed 0x00)

GetRestore

ReportRsp 0x88

RestoreReportSet (1byte,

0x00_DO NOT report when sensor restore;

0x01_DO report when sensor restore)

Reserved

(8Bytes, Fixed 0x00)

(5)Configure DO report when sensor restore (When the vibration stops, R311FD will report an uplink package)

Downlink: 07C7010000000000000000

Response：

87C7000000000000000000 (configuration success)

87C7010000000000000000 (configuration failure)

(6)Read device parameters

Downlink: 08C7000000000000000000

Response：

88C7010000000000000000 (device current parameter)

5.4 Example of MinTime/MaxTime logic

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

Max Time Max Time

Sleeping (Min Time) Sleeping (Min Time)

1H 2H 3H

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.

MaxTime

Sleeping (MinTime) sleeping sleeping sleeping

0H 15th M 30th M 45th M 1H 2H

Wakes up and

collects data

2.8V

Does not report

Wakes up and

collects data

REPORTS 2.8V

Wakes up and

collects data

REPORT 2.8V

Wake up and

collects data

REPORTS 2.8V

Wakes up and

collects data

REPORTS 2.8V

Wakes up and

collects data

REPORTS 2.8V

Wakes up and

collects data

2.8V

Does not report

Wakes up and

collects data

2.8V

Does not report

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