4G DTU Compatible with GPRS/3G GSM Modem Data Transparent Transmission with RS485&232 Serial Port Wireless Data Terminal Equipment 4G DTU

1 Features:
1)Support 4G/3G/2G, Mobile, Telecom and China Unicom
2)Support bidirectional data transparent transmission between terminals TTL, RS485, RS232, and server
User-defined registration packet and heartbeat
3)Standard TCP/IP communication interface Socket in Server  
4)Support Intelligent anti disconnection, support online testing and online maintenance, disconnected then automatic redial, ensure that the equipment is always online
5)Support configuration of the domain name, IP, port number, APN, serial port, baud rate and other parameters through serial port
6)Support remote configuration, remote firmware upgrade
7)Support fixed IP and domain name DNS

2 Technical Parameters
3 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.
3.1 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:    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
 
3.2 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.         
 
4 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 receive text messages last time.          
Special customization requirements for SMS function is supported.

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Company Information:
Shenzhen Thingsend Communication Tech Co.,Ltd
Contact:sarah yuan
Aliexpress store website:https://www.made-in-china.com/showroom/tsyuan 
Website:www.made-in-china.com/showroom/tsyuan
 

We're professional manufacturer of  wireless sensors,2g 3g 4g lte GSM modem,Lora,wireless radio modems,OEM/ODM,wireless customized solutions/system/applications.
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