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Industrial 4G Wireless Gateway , 100Mbps High Speed 4G Wireless DTU

Basic Information
Place of Origin: China
Brand Name: USR
Model Number: LS-DG4
Minimum Order Quantity: 10pcs
Price: Negotiation
Packaging Details: standard carton
Delivery Time: 2-6 days
Payment Terms: T/T, Western Union
Supply Ability: 6000pcs/month
Product: 4G LTE Module Size: 86*81*24mm
Card Type: 4G Speed: 100Mbps
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wireless gateway modem


4g lte module

Industrial 4G Wireless Gateway , 100Mbps High Speed 4G Wireless DTU



1)Main Features

Support 4G/3G/2G, Mobile, Telecom and China Unicom;

Support Bidirectional data transparent transmission between terminals TTL, RS485, RS232, and server;

Support user-defined registration packet and heartbeat ;

Standard TCP/IP communication interface Socket in Server ;

Support Intelligent anti disconnection, support online testing and online maintenance, disconnected then automatic redial, ensure that the equipment is always online;

Support configuration of the domain name, IP, port number, APN, serial port, baud rate and other parameters through serial port ;

Support remote configuration, remote firmware upgrade;

Support fixed IP and domain name DNS.


2)Technical Parameters

Type Parameters Unit
Minimum Typical Value Maximum
Electrical Property (25℃)
Mains Voltage 4.75 12 36 V
Working Current 70 150 250 mA
Peak Current - - 2000 mA
Wireless Performance (25℃)
Frequency Range 4G 3G 2G -
Sensitivity -106dBm -
Max. Emission Power
EGSM900:+33dBm (Power Class 4)…
LTE:+23dBm(Power Class 3) …  
General Performance  
Interface Rate 1200 9600 115200 bps
Interface Level RS485,RS232,TTL  
Working Temperature -40   80
Dimension 52×35×10 (not including antenna and accessories) mm





5)Using Method


5.1 TCP/IP connection

When LS-DG4 works in the TCP/IP connection mode, data communication between LS-DG4 and server is fully transparent transmission, to keep LS-DG4 always online, users need to define the registered data frame and heartbeat data frame, and the server needs to differentiate the registered data frame and heartbeat data frame from user data frame. The server can also remotely set LS-DG4's SDN or domain name.


5.1.1 Registered data frame:

The registered packet data type is 0x00, with a minimum load of 16 bytes. Users can freely add custom data , data is automatically added to the signal strength byte, and can set 70 bytes at most.

Frame head Address Type Load Length Load CRC16 Calibration

Frame head: 0x24

Address: HEX,high byte is in the front

Type: 0x00: reporting IMSI (15 bytes) +CSQ (1 bytes)

Length: part data length, high byte is in the front;

Load: data content: the first 15 bytes are IMSI (ascll code) of SIM card, then 1 bytes is signal strength value RSSI (signed number) of GPRS, and the last one is user-defined registered package information.

CRC16 Calibration: start from frame head to data content, CRC-16 ($1021) check of all data;

1) CRCH: CRC16 checksum high 8 bit;

2) CRCL: CRC16 checksum high and low bit


5.1.2 heartbeat data frame:

The heartbeat packet sends one-byte data by default, and the data is 0x04. If it’s user-defined heartbeat packet, then one sends the user-defined heartbeat packet data, and the transmission interval is 40 seconds.


5.2 SMS function use

When LS-DG4 works in SMS mode, LS-DG4 can communicate with any mobile phone by SMS. When the mobile phone sends any message to LS-DG4,LS-DG4 from serial port sends out the current SMS content (only support up to 70 ASCII characters), if the terminal equipment returns data from serial port (only a maximum of 70 ASCII characters) LS-DG4 will automatically reply the data to the mobile phone number from which it receives text messages last time.

Special customization requirements for SMS function is supported


6)Pin Definitions

Pins Definition Input/output Function Description
1 VCC Input Positive power supply (4.75V-36V)
2 Rxd_RS232 Input Serial port Input of RS232 Level
3 Txd_RS232 Output Serial port Output of RS232 Level
4 GND Input Negative power supply
6 A_RS485 Input, Output A port of RS485 Level
7 B_RS485 Input, Output B port of RS485 Level
8 I01 NC  
9 I02 NC  


7)AT Commands


Command Description Format Parameters
Enter the AT command mode +++ None(Enter and Return OK)
Set IP/SDN domain name AT+SDN=1,[<SDN>,<port>,<num>][…][…]

<SDN>:Domain Name

<port>:Port No

<num>:Serial No. <1~5>

Remark:1 is on highest priority)

Delete IP/SDN domain name AT+SDN=0,< num>

< num >:Serial No. 1~5: Specified Serial No.

A: Delete All

Set ID Number AT+MODIDSET=1, <id> <id>:DTU ID Decimal system
Set Serial Port Parameters AT+IPR=1,<bau>,<length>,<parity>,<stopbit>

<bau>:baud rate

0: 1200bps

1: 2400 bps

2: 4800 bps

3: 9600 bps (default)

4: 19200 bps

5: 38400 bps

6: 57600 bps

7: 115200 bps

<length>:data bits

8: 8 data bits

<parity>:parity check

N: no parity

O: odd parity

E: even parity

<stopbit>:stop bit

1: 1 bit

Add APN Configuration Item AT+PROFILE=1,<SN>,<MCC+MNC>,<APN>,<Username>,<Password>

<SN>:Serial No. Set(1~8)

MCC:Mobile Country Code

MNC:Mobile Network Code

<APN>:Access Point

<Username>:user name


Delete APN Configuration Item AT+PROFILE=0,<SN>

<SN>:Serial No. 1~8: Specified Serial No.

A: Delete All

Set add ID function AT+ADDIDEN=1,<mode>

<mode>:Mode Selection

0:don’t add ID before transparent data transmission is the default

1:add ID before setting transparent data transmission

Set registered packet function AT+REGPKT=1,<text> <text>:registered packet content
Set heartbeat packet format AT+HBTPKT=1,<text>

<text>:heartbeat packet content

Send once every 40s

Set SMS working mode AT+SMSTMODE=1,<mode>

<mode>: Trigger Mode

0: TCP/IP Mode

1: TXT transparent transmission mode

Query firmware version number AT+FWV=? None
Quit AT Command Mode AT+QUIT None(if serial port is no operation, then quit automatically after 60s)

Contact Details

Phone Number : +8613826574847

WhatsApp : +8613826574847