Ebyte E840-DTU User manual

NB-IoT Serial Server

E840-DTU（NB-02）

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-02) user manual

Features...................................................................................................................................................................................2

1. Introduction........................................................................................................................................................................ 3

1.1 Brief Introduction................................................................................................................................................... 3

1.2 Parameters.............................................................................................................................................................. 3

1.3 Interface Description.............................................................................................................................................. 4

1.4 Pin Definition......................................................................................................................................................... 5

2. Quick Start.......................................................................................................................................................................... 6

2.1 Device Preparation................................................................................................................................................. 6

2.2 Data Transmitting Test...........................................................................................................................................6

2.2.1 Test Steps:.................................................................................................................................................... 7

Revision history......................................................................................................................................................................8

Important Statement............................................................................................................................................................... 8

About us.................................................................................................................................................................................8

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-02) user manual

E840-DTU(NB-02) can realize the communication between serial port device and network server via NB network.

With simple AT command, users can easily use this product to achieve bidirectional transparent data transmission from

the serial port to the network.

This manual focuses on the brief introduction of E840-DTU(NB-02). It explains how to make the simplest hardware

environment and test the transparent transmission of E840-DTU(NB-02). The transparent transmission is between UART

devices（referring to PC）and net sever (replaced by TCP testing tools).

Features

Based on NB-IOT communication standard, it can realize more 20dbi gain than GSM.

Support Single Tone, Sub-carrier 15kHz and 3.75kHz：21.25kbps (Downward)

Support multiple network protocol, such as CoAP，UDP，IPv4 ,LwM2M etc.

Support 3GPP TS 27.007 V14.3.0 (2017-03) and Quectel intensified AT command.

Support 8-28V wide voltage power supply, and adopt DC and terminal as the two power supply methods.

RS485 circuit use the electrical isolation, lightning protection and surge protection scheme, it has anti-interference

ability.

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-02) user manual

1. Introduction

1.1 Brief Introduction

E840-DTU(NB-02) is a NB-IoT DTU produced by Ebyte. It features a certain scope of applications which cover

most common application scenarios. The user can realize bidirectional transparent data transmission from the serial port

to the network server by simple setting.

E840-DTU (NB-02) supports DC and RS485 terminal power supply. Its voltage ranges from 8.0 to 28.0V. 5.0V

works too. RS232 and RS485 apply electric isolation which enables anti-interference. It is applicable in some

environment with strong electromagnetic interference like power sector.

1.2 Parameters

Item

Value

Description

Frequency

Band 5

Receiving Frequency：869MHz~894MHz

Transmitting Frequency：824MHz~849MHz

Hardware features

Antenna Type

SMA

Data Interface

RS485 /RS232

Baud Rate

9600bps

Maximum transmitting power

23dBm±2dB

Sensitivity

-129dBm±1dB

Dissipative Flows（typical

value）：

Power-saving mode（PSM）： 3.6uA

Idle Mode（Idle）： 2mA @DRX=1.28s

Working Voltage

DC ８V~２８V

Working Temperature

-40℃- 70℃

Storage Temperature

-40℃- 85℃

Size

82×84×24mm

RS485 /RS232

Electrical isolation, and with RS485/RS232

Software features

Wireless rate

Single Tone，Sub-carrier 15kHz and 3.75kHz：21.25kbps (downward)，

15.625kbps (upstream)

Working Mode

Power-saving mode（PSM）

Idle mode（Idle）

Continuous mode（Active）

Setting command

Abide by 3GPP TS 27.007 V14.3.0 and Quectel intensified AT command

Network protocol

Support multiple protocol, such as CoAP，UDP，IPv4 ,LwM2M etc.

Device ID

Users can configure the device ID via AT command

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-02) user manual

1.3 Interface Description

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-02) user manual

1.4 Pin Definition

Pin No.

Name

Description

RS232

RS232 interface

485_A

Side A of external interface for other RS485 devices

485_B

Side B of external interface for other RS485 devices

GND

Ground electrode

VCC

Power supply，default: 8~28V

PWR

Power indicator

WORK

UART communication indicator

NET

Net working indicator

DC-IN

Power adapter interface

RST

Reset dial switch（down，reset）

ON/OFF

N/A

SIM

SIM card slot

ANT

Antenna interface（SMA-K，50Ω）

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-02) user manual

2. Quick Start

2.1 Device Preparation

E840-DTU(NB-02)

12V Power adaptor

USB to RS485 adaptor or USB to RS232 adaptor

NB-IoT sucker antenna

Please get UART, SIM card, sucker antenna and etc. ready according to the recommended circuit before test.

2.2 Data Transmitting Test

Software is needed for data transmitting test:

Xcom is applied here for the test and you can download it at our website. Users can also apply other test tools that

are available.

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-02) user manual

2.2.1 Test Steps:

1. Insert the SIM card into E840-DTU(NB-02) and connect it to the computer according to the above mentioned

methods. Open the Xcom, set the parameters of corresponding UART NO. and baud rate(only 9600 is available)and

turn on the UART.

2. When powered on with the power adaptor provided by us, POWER indicator on and NET indicator blinking

shows that the transceiver is ready.

3. Wait for 3s-5s to use the serial AT command to access the module.

4. Normal network process

Neul // Waiting 3s after module is powered on

AT+CFUN=1 // configure cfun，“1” means open all the function of module

AT+CIMI //Inquire IMSI——Delay 3s to inquire to ensure the module can

recognize the card.

460012345678966

AT+NBAND?

+NBAND:5 // Read the current frequency, “5” means

850MHz;

AT+NCDP=139.199.157.166,2017//configure CDP server

AT+NCDP? //read the current CDP server

+NCDP:139.199.157.166,2017

AT+CGATT=1 //register network

AT+CSQ //read the current signal intensity +CSQ:21,99 ；

AT+CGATT? // Inquire the network status-it takes times for module to join network. Query within

30s until it is 1, “1” means connection already.

+CGATT:1

AT+CEREG? //Inquire network registration status, “1” means success;

+CEREG:0,1

Note: Before the module joining the network, the IMSI of sim must be registered in the core network, or it cannot

Chengdu Ebyte Electronic Technology Co,;Ltd E840-DTU(NB-02) user manual

Revision history

Version

Date

Description

Issued by

1.00

2018/03/07

Initial version

huaa

Important Statement

1. CDEBYTE reserves the right of final interpretation and modification of all the contents of this manual.

2. As the hardware and software products continuously improving, this manual may subject to change without

notice, please refer to the latest version.

3. Everyone is responsible for protecting the environment: to reduce the use of paper, we only provide electronic

documents of the English manual, if necessary, please go to our official website to download.

About us

Technical support: [email protected]

Documents and RF Setting download link: www.ebyte.com

Thank you for using Ebyte products! Please contact us with any questions or suggestions: [email protected]

------------------------------------------------------------------------------------------------------------

Fax: 028-64146160 ext. 821

Web: www.ebyte.com

Address: Innovation Center D347, 4# XI-XIN Road,Chengdu, Sichuan, China

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