1)Main Features

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

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  ;

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

3)Dimension

4)Frequency Band

5）Using Method

5.1 TCP/IP connection

When XZ-DG4 works in the TCP/IP connection mode, data communication between XZ-DG4 and server is fully transparent transmission, to keep XZ-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 XZ-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
0x24	ID3	ID2	ID1	ID0		0x00	LEN_H	LEN_L	DATA	CRC_H	CRC_L

 

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 XZ-DG4 works in SMS mode, XZ-DG4 can communicate with any mobile phone by SMS. When the mobile phone sends any message to XZ-DG4, XZ-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) XZ-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 Definition

Pins	Definition	Input/output	Function Description
1	VCC	Input	Positive power supply (4.75V-36V)
2	Rxd_TTL/232	Input	3.3V Serial port Input of TTL/RS232 Level
3	Txd_TTL/232	Output	3.3V Serial port Input of TTL/RS232 Level
4	GND	Input	Negative power supply
5	SGND	Input	SGND

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, <i t;	<i t;：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>,<Passwor t;	<SN>：Serial No. Set(1~8) MCC：Mobile Country Code MNC：Mobile Network Code <APN>：Access Point <Username>：user name <Passwor t;：password
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
Reboot DTU	AT+REBOOT	None
Quit AT Command Mode	AT+QUIT	None（if serial port is no operation, then quit automatically after 60s）

​​Welcome to contact Sarah if have any questions. sales(at)thingsend(dot)com.