Ebyte E-840-ttl-4g02 User manual

E840-TTL-4G02 User Manual

4G/LTE Serial Module

Chengdu Ebyte Electronic Technology Co.,Ltd                                                                                                                                    E840-TTL(4G-02)User Manual 
 
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd                            1
CONTENTS 
PRODUCT OVERVIEW........................................................................................................................................................2 
1. INTRODUCTION................................................................................................................................................................................. 2 
2. FEATURES .......................................................................................................................................................................................... 2 
3 MODULE PARAMETER........................................................................................................................................................................... 3 
4 INTERFACE DESCRIPTION ..................................................................................................................................................................... 5 
5 PIN DEFINITION ...................................................................................................................................................................................... 5 
QUICK START .......................................................................................................................................................................6 
1 HARDWARE.........................................................................................................................................................................6 
1 DATA TRANSMISSION TEST................................................................................................................................................................. 10 
1.1 Operating mode is as follows
：..............................................................................................................................................10
 
2 NETWORK FUNCTION..........................................................................................................................................................................12 
3 HIGH SPEED MODE...............................................................................................................................................................................13 
4 SMS FUNCTION....................................................................................................................................................................................16 
AT COMMAND ................................................................................................................................................................... 19 
NOTES.................................................................................................................................................................................... 30 
IMPORTANT STATEMENT .............................................................................................................................................. 31 
REVERSION HISTORY ..................................................................................................................................................... 31 
ABOUT US ............................................................................................................................................................................. 31

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

1 Product Overview

1.1. Introduction

E840-TTL-4G02 is developed for serial port devices and network servers

to transmit data to each other through a network.It is a

LTE-FDD/LTE-TDD/WCDMA/TD-SCDMA/CDMA/GSM wireless

communication data transmission modem with diversity receiving function,

supporting LTE-FDD, LTE-TDD, DC-HSDPA, HSPA+, HSDPA, HSUPA,

WCDMA, TD-SCDMA, CDMA, 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.

The module with 2.0 mm pin header is good for embedded development

by a wide voltage of 5.0V to 20.0V. Support 4G card, RS485 and RS232.

With circuits electrical isolation scheme for anti-interference ability, it can be used in environments with strong

electromagnetic interference, such as power industry. This manual is a quick introduction to the modem E840-TTL-4G02.

It is the easiest hardware environment to test the E840-TTL-4G02 network transmission function, that is, to realize data

being transmitted in both directions between the serial device (here, the computer) and the network server.

1.2. Features

◼Almost meet all M2M application demands;

◼Support data transparent transmission, support TCP, UDP network protocol, support heartbeat package,

registration package function；

◼Support two-way serial transmission from device to network server for 230400 serial port baud rate and

below,;

◼Support serial port large cache function, the serial port data can be cached locally before the server is

established.；

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

◼Support multiple Socket links to send and receive at the same time；

◼Support Modbus RTU and Modbus TCP to automatically convert each other；

◼LTE-FDD：Max downstream rate of 150Mbps， Max upstream rate of 50Mbps，LTE-TDD：Max downstream

rate of 130Mbps，Max upstream rate of 35Mbps；

◼With software/hardware double watchdog design, the system is stable, will never crash.

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

1.3 Module parameter

Parameter

Value

Description

Characteristic

Frequency

LTE-FDD：B1/B3/B5/B8

LTE-TDD：B38/B39/B40/B41

WCDMA：B1/B8

TD-SCDMA：B34/B39

CDMA：BC0

GSM：900/1800MHz

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

LTE-TDD：Max downstream rate 130Mbps， Max upstream rate35Mbps

UMTS

characteristic

support 3GPP R8 DC-HSDPA，HSPA+，HSDPA，HSUPA and WCDMA

Support QPSK，16-QAM and 64-QAM modulation

DC-HSDPA：Max downstream rate 42Mbps

HSUPA：Max upstream rate 5.76Mbps

WCDMA： Max downstream rate 384Kbps， Max upstream rate 384Kbps

TD-SCDMA

characteristic

support CCSA Release 3 TD-SCDMA

Max downstream rate 4.2Mbps， Max upstream rate 2.2Mbps

CDMA2000

characteristic

support 3GPP2 CDMA2000 1X Advanced and 1xEV-DO Rev.A

EVDO：Max downstream rate 3.1Mbps，Max upstream rate 1.8Mbps

1X Advanced：Max downstream rate 307.2Kbps，Max upstream rate 307.2Kbps

GSM

characteristic

R99：CSD tx rate：9.6kbps，14.4kbps

GPRS：support GPRS multiple time slot level 33（default 33），coding format：

CS-1/CS-2/CS-3/CS-4

max of 4 Rx time slot for each frame，Max downstream rate107Kbps，Max

upstream rate 85.6Kbps

EDGE：support EDGE multiple time slot level 33（default 33），support GMSK and

8-PSK

coding format

Downstream coding format：CS 1-4 and MCS 1-9，upstream coding format：CS

1-4 and MCS 1-9

Max downstream rate 296Kbps，Max upstream rate 236.8Kbps

Network protocol

characteristic

Support

TCP/UDP/PPP/FTP/HTTP/NTP/PING/QMI/NITZ/CMUX/HTTPS/SMTP/MMS/FTP

S/

SMTPS/SSL/FILE protocol

Support PAP (Password Authentication Protocol)and CHAP (ChallengeHandshake

Authentication Protocol)

Hardware

Antenna

IPEX interface

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

Characteristic

Data interface

UART

Baud rate

Support 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

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

Sensitivity

FDD B1: -101.6dBm (10M)

FDD B3: -101.9dBm (10M)

FDD B5: -102dBm (10M)

FDD B8: -102.1dBm (10M)

TDD B38: -101.3dBm (10M)

TDD B39: -101.2dBm (10M)

TDD B40: -101.4dBm (10M)

TDD B41: -101.4dBm (10M)

WCDMA B1: -112dBm

WCDMA B8: -112dBm

TD-SCDMA B34: -110dBm

TD-SCDMA B39: -110dBm

CDMA BC0: -108dBm

GSM 900: -109dBm

GSM 1800: -109dBm

Consumption

（Typical）：

11uA @ power off

1.8mA @LTE sleep (PF=128)

1.5mA @LTE sleep (PF=256)

20mA @free

Bandwidth

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

Operating

temperature

-30℃- +70℃ extending to -40℃~+85℃

Operating voltage

DC 5V ~ 20V

Size

42×40×10 mm

SIM card holder

MICRO card holder

3GPP Frequency

Transmit（MHz）

Receive（MHz）

EGSM900

880~915

925~960

DCS1800

1710~1785

1805~1880

CDMA BC0

824~849

869~894

WCDMA B1

1920~1980

2110~2170

WCDMA B8

880~915

925~960

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

TD-SCDMA B34

2010~2025

TD-SCDMA B39

1880~1920

LTE-FDD B1

1920~1980

2110~2170

LTE-FDD B3

1710~1785

1805~1880

LTE-FDD B5

824~849

869~894

LTE-FDD B8

880~915

925~960

LTE-TDD B38

2570~2620

LTE-TDD B39

1880~1920

LTE-TDD B40

2300~2400

LTE-TDD B41

2555~2655

1.4 Interface description

1.5 Pin definition

Pin No.

Name

Description

1

RST

Reset pin

2

IO_RT

The low level lasts for 3~10S, the module parameters will be restored to the factory settings,

and will be restarted immediately.

3

LIKA

SocketA link connection status indicator pin, corresponding to the onboard left 1

LED.

High: SocketA is successfully connected to the web server;

Low: SocketA did not successfully connect to the network server;

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

4

LIKB

The SocketB link connection status indicator pin corresponds to the onboard left 2

LED.

High: SocketB is successfully connected to the web server;

Low: SocketB did not successfully connect to the network server;

5

DATA

The data TX and RX indication pin, when the network receives the data or the serial port

receives the data (50ms high/10ms low), corresponding to the onboard left 3LED light.

6

STAT

The device status indication pin corresponds to the onboard left 4 LED.

Low: The device is powered on to search for 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.

7

RXD

Data receiving pin, default 3.3V, compatible with 5V communication level.

8

TXD

Data transmitting pin, default 3.3V, compatible with 5V communication level.

9

VEF

Drive level power supply pin, if you need to achieve serial communication and LED indication

is 5V drive level, you need to input 5V level on this pin.

10、11、14、

15、23

MOD、SLE、

PA11、PA10、EN

NC

12

4V2

Lithium battery power supply pin, power supply range: 3.8V~4.3V. This pin is prohibited from

being reversed and is not allowed to be supplied with VCC.

16

VCC

DC power supply pin, power supply range: 5V~20V. This pin is prohibited from being reversed

and is not allowed to be supplied with VCC.

19

VD

External SIM card power supply pin, if the onboard SIM card holder is used, the pin remains

NC

20

RS

External SIM card reset pin, if the onboard SIM card holder is used, the pin remains NC

21

DA

External SIM card data pin, if the onboard SIM card holder is used, the pin remains NC

22

CL

External SIM card clock pin, if the onboard SIM card holder is used, the pin remains NC

24

LIKD

SocketD link connection status indicator pin, corresponding to the onboard right 3

LED.

High: SocketD is successfully connected to the web server;

Low: SocketD did not successfully connect to the network server;

25

LIKC

SocketC link connection status indicator pin, corresponding to the onboard right 2

LED.

High: SocketC is successfully connected to the web server;

Low: SocketC did not successfully connect to the network server;

13、17、18

GND

Ground

2. Quick start

2.1 Hardware

Hardware for test are as follows：

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

E840-TTL（4G-02）

5V—20V power adaptor or 4.2V battery

USB to TTL board

4G/LTE sucker antenna and IPEX to SMA cable

UART cable connected according to recommended circuit diagram，SIM card and antenna

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

1. Access the official website of EBYTE: www.ebyte.com, to download the latest GPRS/E840-TTL-4G02 series

product configuration tool, install USB to 232/485 driver, run the software!

2. Select the corresponding COM port number. The factory default serial port baud rate is 115200, 8N1, as shown

below:

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

1. Click the tool "Enter Configuration Status" button and wait for the device parameters to be automatically obtained. After

completion, the following figure is displayed:：

2. Query the signal strength, set the device connection server IP and port number to be: 116.62.42.192, 8124; (Ebyte

test server), and finally click "Save all parameters", and finally as shown below:：

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

3. Click the tool "Module Restart" button and wait for the device LINK light to be on.

4, Search "Ebyte IoT expert" WeChat public number, enter the page, click: Customer Support -> Device

Test, the mobile phone screenshot interface is as follows:

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

5. Use the PC-side tool to send data to, and use the mobile phone to send data to the device. The communication test

result is as shown below:

2.1 Data transmission test

⚫Software tools used for the test are as follows：

Any serial port assistant, XCOM is used in this manual, which can be downloaded from our official website.

2.1.1 Operating mode is as follows：

1、operating mode includes：transparent transmission mode、AT configuration mode

a) Transparent transmission mode: After power-on, the radio works in the transparent transmission 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 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

1024 bytes. When multiple links are connected to the server at the same time, the data packet will be sent to the four links at the

same time. When there are data to be sent from any network link, the radio will transparently output the data.

b) Protocol transmission: This module supports 4-channel Socket connections. For each socket users can configured it as TCP

Client or UDP Client. When sending data, users can use protocol transmission or transparent transmission.

Protocol transmission format

Transmit：0x55 0xFE 0xAA ID data

For example：55 FE AA 02 AA BB //02： SOCK2 link，AA BB：the data that the user actually needs to

transmit

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

Receive：0xAA 0XFE 0x55 ID data length Data

For example： AA FE 55 02 03 11 22 33 //02: SOCK2 link， 03：the valid data length received this time

11 22 33：real data

Demonstration：

Take SOCK2 as an example：，

Transmit：+++(do not add new line for transmitting ) //enter AT command

Transmit：AT+VER(add new line for transmitting ) //read version info. And enter AT command setting at the

same time

+OK=E840-TTL(4G-02)_V1.0

Transmit ：AT+SOCK2=1,TCPC,116.62.42.192,31687 //open SOCK2 and configure the network server

parameters that SOCK2 will connect to (the parameter used

here is Ebyte test server, not recommended for users)

+OK

Transmit：AT+LINKSTA2 //read if SOCK2 has started connection with server

+OK=Connect

Transmit：AT+POTOCOL=ON // open protocol transmission mode

+OK

Transmit：AT+POTOCOL //inquire if protocol transmission is on

+OK=ON

AT+REBT //restart

+OK

Waiting for the radio to restart, SOCK2 will automatically establish a connection with the server. After the connection is

started, data can be transmitted to each other via protocol.

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

a) AT mode：under this mode all UART data is considered as AT command.

b) 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, send AT+EXAT<CR><LF> to

switch to transparent transmission mode.

2.2 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. The user can configure 4 types of registration

packages. You can choose to send the physical address (IMEI code) when connecting, send custom data when connecting,

add the physics before the connection and each packet of data. Custom data is added to the address, connection time, and

data before each packet. The maximum length of the custom registration packet 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 heartbeat types: network heartbeat and

serial heartbeat. When the network heartbeat is selected, the communication idle time starts, and the heartbeat data packet

is sent to the server according to the configured heartbeat period. Select the serial port heartbeat, start timing with

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

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

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 size of each Socket in the local cache is 128 bytes, and each Socket buffer is

independent of each other.

2.3 High speed mode

The E840-TTL-(4G-02) is designed with a separate high-speed mode. In this mode, both the network and the device can transmit any

packet length data, such as file, picture, and video.

Configure/query the high-speed mode state through the AT+HSPEED command. After the high-speed mode is enabled, the device can

transmit any packet length data at 230400 serial port baud rate and below.

The E840-TTL-(4G-02) file transfer process will be demonstrated below:

1. Turn on the device high-speed mode: After the device enters the AT mode, send AT+HSPEED=ON to enable the high-speed mode,

configure the connected server address, and restart the device.

2. Ready to transfer the file. The file transferred in this demo is RF_Setting3.49.exe. The file is an executable file. After startup, the

following interface is displayed:

3. Open the serial port tool and use the file sending method to open RF_Setting3.49.exe. After the device is connected to the

network server normally, click “send file” and the sending is completed as shown below.：

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

4. The server (the external network mapping used for this demo, the server is the TCP debugging tool), after receiving the data, it

is as follows：

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

5. Save the data as an .exe trial file type. This time it is named RF.exe, as shown below:：

6. Click on the server to run RF.exe to test the file, as shown below：

In summary, the E840-TTL-(4G-02) completes the remote transfer of files from the serial port to the network server.

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

2.4 SMS function

E840-TTL-(4G-02) can support SMS sending and receiving, SMS remote configuration function (inserted SIM card needs to

support SMS service).

a) SMS sending: In AT mode, send AT+SMSSEND=number, data to complete the SMS sending, where number

refers to the receiving number, and data refers to the data to be sent.

The demo is shown below:

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

a) SMS receiving: The device can receive remote SMS content in transparent transmission mode. The format is as follows:

+SMS REC:number

Data, where number is the sender's mobile phone number and data is the received short message content;

b) SMS configuration/query: The device can support SMS remote configuration/inquiry parameters in transparent transmission

mode. The format of the transmission format command is:

<Head>AT+CMD, where <Head> is the device SMS identifier. The factory default is: EbyteSMS, CMD is the corresponding

command. Specifically, you can view the introduction of AT commands.

In this demonstration, remotely use the mobile phone to query the SOCK1 link information of the device:

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

5. Modbus RTU and Modbus TCP are mutually converted;

E840-TTL-(4G-02) supports the mutual conversion between Modbus RTU and ModbusTCP. After the function is enabled, after

receiving the data, the device will detect whether the data meets the Modbus RTU or ModbusTCP protocol. If it meets the

requirement, the conversion function is enabled. Otherwise, it will output/send original data.

a) For example, the serial port receives the ModbusT RTU write-out command in the following format (hexadecimal):

01 06 00 01 00 01 19 CA (ModbusT RTU), when the conversion function is enabled, the data received by the server is: 00 00 00

00 00 06 01 06 00 01 00 01 (ModbusT TCP)

b) When the data received by the network is: 00 00 00 00 00 06 01 06 00 01 00 01 (ModbusT TCP), the serial port of the device will

output the data : 01 06 00 01 00 01 19 CA (ModbusT RTU);

Note: In the Modbus TCP standard protocol, the transaction element identifier needs to be specified. In E840-TTL-(4G-02), the

user can configure the value through AT+MTCPID, and when the value is configured to 0, the receiving end All data

conforming to the Modbus TCP protocol will be parsed, otherwise only packets with the same application packet identifier and

device configuration identifier will be converted.

6 Base station positioning function;

The E840-TTL-(4G-02) supports the base station positioning function. The user can send the AT+LBS command in the AT mode

to read the current LBS information of the device. The device returns the data format as follows:

+OK=LAC,xxxx;CID,xxxx, where LAC is the unique identification number of the global cell, CID is the base station number,

(xxxx is the hexadecimal value);

The LAC and CID number can be used to query the current location information of the device. For the query method, refer to the

link: http://www.gpsspg.com/bs.htm

7 Serial port packaging function;

The E840-TTL-(4G-02) serial port break time and packing length can be configured. The user can configure the frame break

time and the package length through the AT+UARTTS command. Please refers to the AT command for the specific configuration .

a) Frame break time: When the serial port receives data, it will continuously detect the interval between two bytes. If it is greater

than the configuration time (50-2000ms), the device will automatically send the previously received data as a data packet to Network

side;

b) Packing length: When the serial port receives data, it will continuously check the length of the currently received data. If the

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

length of the configuration is exceeded (20~1024 bytes), the device will automatically send the previously received data as a data

packet to Network side;

8 Enable Ebyte IoT platform function

The AT+EBTIOT command is used to set whether the module enables the transparent transmission function of the EBYTE

cloud platform, after it is turned on, the information such as the heartbeat and registration packet 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

device. Data is transparent. For details of the related operations, please refer to the "Ebyte Cloud Platform Transparent

Transmission Guide".

3. AT command

a) Command format：

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

AT+：command front end

CMD：control command

[op]：“=” indicates parameter configuration

“NULL”indicates parameters inquire

[para-n]：parameter list

<CR><LF>：CRLF，ASCII 0x0D 0x0A

b) Command error code：

Error code

Description

-1

Invalid command format

-2

Invalid command

-3

Invalid operator

-4

Invalid parameter

-5

Operation prevented

c) Command set：

REBT

restart module

VER

inquire version No.

INFO

inquire device info.

EXAT

exit AT command mode

RESTORE

restore to factory configuration

UART

set/inquire UART parameter

UARTCLR

set/inquire if UART buffer is cleared before module is

connected

IMEI

inquire IMEI

LINKSTA

inquire SOCK connection status

LINKSTA1

inquire SOCK1 connection status

LINKSTA2

inquire SOCK2 connection status

LINKSTA3

inquire SOCK3 connection status

SOCK

set/inquire SOCK parameter

SOCK1

set/inquire SOCK1 parameter

SOCK2

set/inquire SOCK2 parameter

Ebyte E-840-TTL-4G02 User manual

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