Ebyte E840-dtu User manual

GPRS Serial Server

E840-DTU（GPRS-03）

User Manual

This manual may be modified based on product upgrade, please refer to the latest version.

All rights to interpret and modify this manual belong to Chengdu Ebyte Electronic Technology Co., Ltd.

GPRS E840-DTU（GPRS-03）User Manual

Version

Date

Description

Issued by

1.00

2018/08/02

Initial version

huaa

E840-DTU (GPRS-03) is a product developed for serial port devices and network servers to transmit data through each other through the network. This product

uses the standard AT command, which enables transparent transmission between devices and servers. The cloud platform built by Ebyte can realize the free

networking mode. The E840-DTU (GPRS-03) is an industrial grade quad-band GSM/GPRS digital radio.

This chapter is a quick introduction to the E840-DTU (GPRS-03) product. It is the easiest hardware environment to test the E840-DTU (GPRS-03) network

transmission function, that is, to realize the serial device (here, the computer) to the network server ( TCP test tool instead of) network transparent transmission.

Feature

Able to meet almost all M2M application needs;

Support data transparent transmission, support TCP, UDP network protocol, support heartbeat package, registration package;

Support serial port caching function, the serial port data can be cached locally before the connection is established with the server;

Maximum GPRS data downstream rate is 85.6kbps, maximum upstream rate is 85.6kbps;

Support TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING，code format include CS-1、CS-2、CS-3 and CS-4；

Support 8~28V wide voltage power supply, adopt DC power supply and terminal terminal power supply mode;

The RS485 circuit uses electrical isolation, lightning protection, and surge protection to provide immunity to interference.

GPRS E840-DTU（GPRS-03）User Manual

Contents

FEATURE.............................................................................................................................................................................................. 1

1. INTRODUCTION.............................................................................................................................................................................3

1.1 BRIEF INTRODUCTION................................................................................................................................................................. 3

1.1. PARAMETERS............................................................................................................................................................................... 3

1.2. INTERFACE DESCRIPTION............................................................................................................................................................ 4

1.3. PIN DEFINITION..........................................................................................................................................................................5

2. QUICK START..................................................................................................................................................................................5

2.1. DEVICES PREPARATION...................................................................................................................................................................5

3. OPERATING MODE........................................................................................................................................................................7

3.1 TRANSPARENT TRANSMISSION.........................................................................................................................................................7

3.2 AT MODE...................................................................................................................................................................................... 8

3.3 MODE SWITCH...............................................................................................................................................................................8

4. NETWORK FUNCTION.................................................................................................................................................................. 8

5. EBYTE IOT PLATFORM FUNCTION............................................................................................................................................. 8

6. AT COMMAND...............................................................................................................................................................................8

7. NOTES............................................................................................................................................................................................14

8. IMPORTANT STATEMENT..........................................................................................................................................................15

9. ABOUT US.....................................................................................................................................................................................15

GPRS E840-DTU（GPRS-03）User Manual

1. Introduction

1.1 Brief Introduction

E840-DTU (GPRS-01) is a new generation wireless data transceiver developed by Ebyte. The software of this product is fully functional and covers most of the

conventional application scenarios. Users can realize the transparent transmission of bidirectional data from serial port to network server through simple setting.

The radio is powered by the DC power supply or RS485 terminal in the power supply section. It is powered by a wide voltage of 8.0V to 28.0V and supports

5.0V power supply. It only supports mobile and Unicom 2G cards. RS485 and RS232 circuits use electrical isolation schemes, which have anti-interference ability and

can be used in some environments with strong electromagnetic interference, such as some power industries.

1.2 Parameters

Item

Value

Description

Characteristic Features

Support Band

Quad Band: GSM850, EGSM900, DCS1800, PCS1900

Module automatically searches for frequencies

Band selection can be set by AT command

Compliant with GSM Phase 2/2+

GPRS connection characteristic

GPRS multi-slot class 12 (default)

GPRS multi-slot class 1~12 (configurable)

GPRS mobile station class B

GPRS data feature

GPRS data downstream transmission: up to 85.6kbps

GPRS data upstream transmission: up to 85.6kbps

Encoding format: CS-1, CS-2, CS-3 and CS-4

Support for PAP (Password Authentication Protocol) protocols commonly used for PPP

connections

Support is usually used for CHAP (Interrogation Handshake Authentication Protocol) protocol

Embedded protocol: TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING, etc.

Support for unstructured supplementary data services (USSD)

Hardware Features

Antenna

SMA

Data interface

RS485 / RS232

Baud rate

1200bps ~115200bps，default：115200bps

TX power

Class 4 (2W)： GSM850 and EGSM900

Class 1 (1W)： DCS1800 and PCS1900

AT command format

Ebyte general AT command

3GPP frequency

1 Timeslot

2 Timeslot

4 Timeslot

CS-1

9.05kbps

18.1kbps

36.2kbps

CS-2

13.4kbps

26.8kbps

53.6kbps

CS-3

15.6kbps

31.2kbps

62.4kbps

CS-4

21.4kbps

42.8kbps

85.6kbps

GPRS E840-DTU（GPRS-03）User Manual

1.3 Interface Description

GPRS E840-DTU（GPRS-03）User Manual

1.3 Pin Definition

Pin NO.

Name

Description

RS232

RS232 interface

485_A

Side A of eternal interface for other RS485 devices

485_B

Side B of eternal interface for other RS485 devices

GND

Ground

VCC

Power supply 8V-28V DC

PWR

Power indicator

WORK

UART communication indicator

NEL

Radio network working indicator, no light: Initializing, slow flashing: access to the base station, fast flashing:

initialization is not successful, always on: access server

DC8~28V

Power adaptor interface, range: 8~28V

RST

Reset（downward，reset）

Restore

The radio operating DIP switch (downward, factory reset) needs to be operated in 3s-10s.

SIM

For SIM card

ANT

Antenna （SMA-K ，50Ω impedance match）

2. Quick start

2.1 Devices preparation

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

One piece of E840-DTU(GPRS-03)

One piece of 12V power adaptor

GPRS E840-DTU（GPRS-03）User Manual

USB to RS485 adaptor or USB to RS232 adaptor(optional)

GPRS sucker antenna

1、 Enter the AT command mode and send +++ in the serial port assistant (+++ does not need to check to send a new line, other AT commands

need to tick to send a new line to be valid), one must send any other AT command within 3 seconds after sending +++ (except for AT

command for restarting) to enter the AT command mode completely.

2、 After entering the AT command mode, use AT+CPIN to check the SIM card access:

For example: AT+CPIN

+OK=1

For example ：AT+CPIN

+OK=1

Indicates that the SIM card is connected, and use AT+CSQ to view the current signal strength：

For example：AT+CSQ

+OK=26

Execute the parameter modification command. If the baud rate is modified, it needs to be restarted to be valid.

3、 Access server, AT + SOCK = TCPC, 116.62.42.192, 31687 parameters separated by English characters comma, IP instructions are separated by

English characters, after return + OK, one need to restart command AT + REBT to make it valid Here, the IP is only a demonstration, and the

actual connection is based on the IP of the server to be connected.

GPRS E840-DTU（GPRS-03）User Manual

4、 After the base station is connected, the NET light is always on to indicate that the server is connected, and transparent transmission is

possible at this time.

5、 User can also use the Ebyte cloud platform for any networking operation. For details, please refer to the operation manual of Ebyte Cloud

Platform.

3. Operating mode

3.1 Transparent transmission

After power-on, the radio works in transparent mode by default, and automatically starts the network connection. When the connection is established with

the server, any data received by the serial port will be transparently transmitted to the server. At the same time, it can also receive the data from the server. After

receiving the server data, the module will output directly through the serial port. The maximum length of data supported by this module is 512 bytes.

This module supports one-channel Socket connection. The user can configure it as TCP Client or UDP Client. In transparent transmission mode, the received

serial port data will be directly transmitted to the network server, and the received network server data will be directly output through the serial port.

GPRS E840-DTU（GPRS-03）User Manual

3.2 AT mode

In this mode, the serial port data is regarded as an AT command. The user can configure the module through a valid AT command. If the format is wrong, the

relevant error code will be prompted.。

3.3 Mode switch

In the transparent transmission mode, after the serial port receives the "+++" frame data, the RX pin receives any AT command within 3 seconds, and the

mode switches to the AT mode. In AT mode, one can send AT+EXAT<CR><LF> to switch to transparent transmission mode.。

4. Network function

a) Short connection: In TCP Client mode, the short connection function is enabled. If there is no data reception in the serial port or network port within

the set time, the network connection will be automatically disconnected. The short connection function is turned off by default. The connection time

can be set from 2 to 255 seconds. When set to 0, the short connection function is disabled.

b) Registration package: The registration package is closed by default. 4 options include: physical address when connecting, send custom data when

connecting, add physical address before each packet of data, add custom data before each packet of data. The maximum data length for customize

registration package is 40 bytes (when set to HEX format, the maximum length is 20 bytes)

c) Heartbeat packet: In the idle state of network communication, the heartbeat packet is used for network state maintenance. The heartbeat period can

be set from 0 to 65535 seconds, and the maximum length of the heartbeat packet is 40 bytes (when set to HEX format, the maximum length is 20

bytes). Supports two types of heartbeats, network heartbeat, serial heartbeat. User selects network heartbeat, starts timing when in communication idle,

and sends heartbeat packets to the server according to the configured heartbeat period. User selects the serial port heartbeat, start timing when in

communication idle, and send heartbeat packets to the serial port according to the configured heartbeat period.

Clear the cache: Before the connection to the server is established, the data received by the serial port will be cached. When the connection with the

server is established, you can choose whether to clear the cached data. By default, the cache is cleared.

The maximum packet length of the local cache is 256 bytes.

5. Ebyte IoT platform function

AT+EBTIOT command is used to set whether the module enables the transparent transmission function of the Ebyte cloud platform, after the device is

turned on, the information such as the heartbeat and registration package configured by the user will be invalid. The user only needs to set the forwarding

relationship of the corresponding device to the platform to implement the transparent transmission. For details of the related operations, please refer to the

"Transparent Transmission Guide for Ebyte Cloud Platform ".

6. AT command

a) Command format：

AT+<CMD>[op][ para1, para2, para3,…]<CR><LF>

AT+：Command prefix

CMD：Control command

[op]：“=”indicate parameter configuration

GPRS E840-DTU（GPRS-03）User Manual

“NULL”indicate parameter query

[para-n]：parameter list

<CR><LF>：Enter, start new line，ASCII 0x0D 0x0A

b) Error code：

Error code

Description

-1

Invalid command format

-2

Invalid command

-3

Invalid Operator

-4

Invalid parameter

-5

Operation not allowed

c)Command set：

Command

Description

REBT

Restart Module

VER

Query version number

INFO

Query device info.

EXAT

Exit AT command mode

RESTORE

Restore factory setting

UART

Set/Query UART parameter

UARTCLR

Set/query whether UART cache is cleared before

module connection

MAC

Set/query MAC address

IMEI

Set/query IMEI

LINKSTA

Set/query SOCK connection

LINKSTA1

Set/query SOCK1 connection

LINKSTA2

Set/query SOCK2 connection

LINKSTA3

Set/query SOCK3 connection

SOCK

Set/query SOCK parameter

SOCK1

Set/query SOCK1 parameter

SOCK2

Set/query SOCK2 parameter

SOCK3

Set/query SOCK3 parameter

REGMOD

Set/query registration package mode

REGINFO

Set/query customized registration package

information（ASCII）

REGINFO1

Set/query customized registration package

information（HEX）

HEARTMOD

Set/query Heartbeat Packet mode

HEARTINFO

Set/Query Customized Heartbeat Packet

Information（ASCII）

HEARTINFO1

Set/query custom heartbeat packet information

(hexadecimal)

HEARTM

Set/query heartbeat time

SHORTM

Set/query short connection time

EBTIOT

Set/Query EBYTE IoT Cloud Platform Enable

CREG

Query whether registered to network

CSQ

Query signal strength

CPIN

Query SIM status

Other manuals for E840-DTU

This manual suits for next models

Table of contents

Other Ebyte Server manuals

Ebyte

Ebyte NB124E User manual

Ebyte

Ebyte NB144S User manual

Ebyte

Ebyte E840-DTU User manual

Ebyte

Ebyte E103-W02DTU User manual

Ebyte

Ebyte E810-DTU User manual

Ebyte

Ebyte NB144E User manual

Ebyte

Ebyte E840-DTU User manual

Ebyte

Ebyte E810-DTU User manual

Ebyte

Ebyte NB1A1 User manual

Popular Server manuals by other brands

HP Tc2120 - Server - 256 MB RAM installation guide

Lenovo

Lenovo ThinkServer RD230 manual

Avocent

Avocent CPS810 Installer/user guide

Dell

Dell PowerEdge R6615 Installation and service manual

FreeWave

FreeWave HT2+ installation guide

GIGA-BYTE TECHNOLOGY

GIGA-BYTE TECHNOLOGY G492-Z50 user manual

Lanner

Lanner HTCA-E400 user manual

Bull

Bull NovaScale T840 E2 user guide

Asus

Asus RS740-E70RS24-EG Configuration guide

Meinberg

Meinberg LANTIME M300/TCR manual 

HP ProLiant SL335s G7 Maintenance and service guide

ZyXEL Communications

ZyXEL Communications VANTAGE RADIUS 50 user guide

Lantronix

Lantronix xDirect-IAP quick start guide

Fujitsu

Fujitsu PRIMEQUEST 2400E3 General description

IBM

IBM 9040-MR9 manual

IBM

IBM 306m - eServer xSeries - 8849 user guide

green hippo

green hippo Hippotizer Nevis+ quick start guide

IBM

IBM 8203-E4A Brochure & specs