Ebyte E840-DTU User manual

E840-DTU(4G-02E）E840-DTU(4G-02E）

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

Contents

Features...................................................................................................................................................................................3

1.1 Introduction.......................................................................................................................................................................4

1.2 System parameter..............................................................................................................................................................4

1.3 Interface description......................................................................................................................................................... 6

1.4 Pin definition.................................................................................................................................................................... 7

2.1 Hardware...........................................................................................................................................................................9

2.2 Data transmission test..................................................................................................................................................... 10

Demonstration：...................................................................................................................................................................11

3. AT command.................................................................................................................................................................... 20

4 .Notes................................................................................................................................................................................. 31

5. Important Statement..........................................................................................................................................................32

6. Reversion History............................................................................................................................................................. 32

7. About Us........................................................................................................................................................................... 32

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

E840-DTU(4G-02E ）is developed for serial port devices and network servers to transmit data to each other

through a network.It is a LTE-FDD/WCDMA/GSM wireless communication data

transmission modem with diversity receiving function, supporting LTE-FDD, DC-

HSDPA, HSPA+, HSDPA, HSUPA, WCDMA, EDGE and GPRS network data

connections, through simple AT commands Settings, you can easily use this product to

achieve two-way data transparent transmission from serial to network.

This manual is a quick introduction to the modem E840-DTU(4G-02E). It is the

easiest hardware environment to test the network transmission, that is, to realize data

transmitted between the serial device (here, the computer) and the network server.

Features

Meet almost all M2M application demands;

Data transparent transmission, TCP, UDP network protocol, heartbeat packet, and registration package function

available;

Max serial port baud rate: 230400, two-way serial transmission between device and network server;

Serial port large cache and the serial port data can be cached locally before the server is established.；

SMS sending and receiving, SMS remote query/configuration device parameters;

Multiple Socket links to send and receive at the same time;

Modbus RTU and Modbus TCP to automatically convert each other;

The maximum downlink rate is 150Mbps, and the maximum uplink rate is 50Mbps.

With MQTT protocol, the device can access Alibaba Cloud, oneNET, Baidu cloud, and other IoT platforms;

Network AT command available, which can be configured remotely through the network.

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

1. Product overview

1.1 Introduction

E840-DTU (4G-02E) is an LTE digital transmission module product launched by E-Tech. The software of this

product is fully functional and covers most common application scenarios. Users can implement serial-to-network server

through simple setup. Two-way data transparent transmission.

The radio is powered by the DC power supply or RS485 terminal in the power supply section and is powered by a

wide voltage of 8.0V to 28.0V. Support mobile, China Unicom, Telecom 4G card, RS485 and RS232 circuits use

electrical isolation scheme, with anti-interference ability, can be used in some environments with strong electromagnetic

interference, such as some power industry.

1.2 System parameter

Parameter

Value

Description

Characteristic

Frequency

LTE-FDD：B1/B3/B7/B8/B20/B28A

WCDMA：B1/B8

GSM：B3/B8

LTE

characteristic

Support max. of 3GPP R8 non-CA Cat 4 FDD and TDD

Support 1.4MHz~20MHz , Downstream support：MIMO

LTE-FDD: Max downstream rate 150Mbps, Max upstream

rate50Mbps

WCDMA characteristic

WCDMA: Max downstream rate 384Kbps，Max upstream rate

384Kbps

GSM characteristic

GPRS: Max downstream rate 107Kbps，Max upstream rate

85.6Kbps EDGE: Max downstream rate 296Kbps，Max

upstream rate 236.8Kbps

Network protocol

characteristic

TCP/UDP/PPP/FTP/HTTP/NTP/PING/QMI/NITZ/CMUX/HTTP

S/SMTP/MMS/FTPS/

SMTPS/SSL/FILE

PAP (Password Authentication Protocol) and CHAP

(ChallengeHandshake Authentication Protocol)

Hardware Characteristic

Antenna

SMA

Data interface

RS485 /RS232

Baud rate

Max 921600bps，default 115200bps

Transmitting

power

Class 4 (33dBm±2dB) for GSM900

Class 1 (30dBm±2dB) for DCS1800

Class E2 (27dBm±3dB) for GSM900 8-PSK

Class E2 (26dBm±3dB) for DCS1800 8-PSK

Class 3 (24dBm+2/-1dB) for CDMA BC0

Class 3 (24dBm+1/-3dB) for WCDMA bands

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

Class 2 (24dBm+1/-3dB) for TD-SCDMA bands

Class 3 (23dBm±2dB) for LTE-FDD bands

Class 3 (23dBm±2dB) for LTE-TDD bands

FDD B1: -101.5dBm (10M)

FDD B3: -101.5dBm (10M)

FDD B7: -99.5dBm (10M)

FDD B8: -101dBm (10M)

FDD B20: -102.5dBm (10M)

FDD B28A: -102dBm (10M)

WCDMA B1: -110dBm

WCDMA B8: -110.5Bm

GSM 3: -109dBm

GSM 8: -109dBm

Consumption

（Typical）

11uA @ power off

1.8mA @LTE sleep (PF=128)

1.5mA @LTE sleep (PF=256)

20mA @idle

Bandwidth

1.4/3/5/10/15/20MHz

Operating

temperature

-30℃- +70℃ extending to -40℃~+85℃

Operating voltage

DC ８V~２８V

Size

82×84×24mm

RS485 /RS232

RS485/RS232

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

1.3 Interface description

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

1.4 Pin definition

Pin No.

Name

Description

RS232

RS232 interface

485_A

To connect the end A of other RS485 device

485_B

To connect the end B of other RS485 device

GND

Ground

VCC

Power supply，8~28V,12V or 24V is recommended

PWR

Power indicator

WORK

Blue: Receipt transceiver pin, when the network receives data or the serial port

receives data (50ms high/10ms low)

Green: device status indication pin, Low: The device is powered on to search for a

SIM card 1800ms low, 200ms high: The device checks the correct SIM card and is

attaching to the network; High: The device is attached to the network successfully;

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

NET

Green: Socket A link connection status indication pin High: Socket A is successfully

connected to the network server; Low: Socket A is not successfully connected to the

network server;

Blue: Socket B link connection status indication pin High: Socket B is successfully

connected to the network server; Low: Socket B is not successfully connected to the

network server;

DC-IN

DC adaptor，8~28V, 12V or 24V is recommended

RST

Dip switch（downward，reset）

Restore

Dip switch

After the radio is powered on normally, the Restore dials from top to bottom, and

continues down for 3~10S, then from bottom to top. After the process is completed

normally, the radio parameters will be restored to the factory settings and restarted

immediately.

SIM

SIM card slot

ANT

Antenna （SMA-K，50Ω impedance）

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

2.Quick start

2.1 Hardware

Hardware for test are as follows：

Connect the power supply, antenna, SIM card, serial cable and other hardware before testing.

1. Enter the AT command mode and send +++ in the serial port assistant (except that +++ does not need to tick to send

a new line, other AT commands need to check to send a new line to be valid), you must send +++ command 3s Send

any other AT command (except for restarting the AT command) to fully enter the AT command mode.

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

For example: AT+CPIN

+OK=1

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

For example: AT+CSQ

+OK=26

Indicates that the current signal strength is normal. If the response is 99, the current signal strength is abnormal. Check

whether the current antenna is connected or the surrounding base station is abnormal.

3. Access server, AT + SOCK = TCPC, 116.62.42.192, 31687 (parameters are separated by English characters comma,

separated by English characters between IP instructions), if it is SOCK1, SOCK2, SOCK3, need to be The front-end plus

enable command (see the AT command description section for details).

SOCK settings

For example: AT+SOCK=TCPC, 116.62.42.192, 31687

+OK

SOCK1, SOCK2, SOCK3 settings

For example: AT+SOCK1=0, TCPC, 116.62.42.192, 31687

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual

+OK

Indicates that the setting was successful.

4. Restart (after all AT commands modify parameters, the device will take effect after restarting)

Execution command AT+REBT returns OK and the device restarts immediately. Here IP only shows the

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

5. 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.

2.2 Data transmission test

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