Usr USR-GPRS232-701 User manual
GPRS DTU User Manual V1.3 http://en.usr.cn
GPRS Data Transmit Unit
(USR-GPRS232-701)
File version: v1.6
GPRS DTU User Manual V1.3 http://en.usr.cn
Content
GPRS Data Transmit Unit..................................................................................................................... 1
1. Product Description.........................................................................................................................3
1.1. Instruction............................................................................................................................ 3
1.2. Features................................................................................................................................ 3
1.3. Parameters........................................................................................................................... 4
2. Install............................................................................................................................................... 5
2.1. Packing list............................................................................................................................ 5
2.2. Size and Diagram.................................................................................................................. 5
2.3. Antenna and SIM Card Installation...................................................................................... 6
2.4. Power Supply........................................................................................................................6
2.5. Indicator Lamps.................................................................................................................... 6
2.6. Serial Port Instruction...........................................................................................................7
2.6.1. RS232 Definition........................................................................................................7
2.6.2. RS485 definition........................................................................................................ 8
2.6.3. TTL definition.............................................................................................................8
3. Parameter Configuration................................................................................................................. 8
3.1. Hardware Connection.......................................................................................................... 8
3.2. Parameter Configuration......................................................................................................9
3.3. Software configuration.........................................................................................................9
3.3.1. Software interface introduce.................................................................................... 9
3.3.2. Software operation................................................................................................. 10
3.4. AT Command Configuration............................................................................................... 11
3.5. Message Configuration...................................................................................................... 11
4. Public IP Instructions..................................................................................................................... 12
5. Application Environment Testing.................................................................................................. 14
5.1. Application of Public Server............................................................................................... 14
5.2. Application of Router Transit............................................................................................. 18
5.3. Application of Server Transit.............................................................................................. 22
6. AT Command................................................................................................................................. 23
6.1. Set Key Parameter.............................................................................................................. 23
6.2. Configure DTU business Packet..........................................................................................24
6.3. Set TCP/IP........................................................................................................................... 25
6.4. Setting Example..................................................................................................................27
7. FAQ.................................................................................................................................................28
8. Contact...........................................................................................................................................30
9. File history..................................................................................................................................... 31
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1. Product Description
1.1.Instruction
GPRS DTU (Data Transfer unit) is a wireless terminal equipment which can converter
serial data to IP data or converter IP data to serial data, then transmit through wireless
communication network. GPRS DTU is to use GPRS network to transmit data, it adopts
industrial-grade embedded processor, embedded TCP/IP protocol stack. To provide users
with virtual private networks, which is high speed, stable and reliable, data terminal online
forever, and a variety of protocol conversion.
At present, this device have already been used widely in M2M industry, such as
Electric power industry: 1. Electric remote meter reading 2. Substation monitor 3.
Power line monitor 4. Switch monitoring system on distribution network column
Water conservancy industry: 1. Water quality monitor 2. Reservoir gate remote
control system solutions 3. Water conservancy GPRS scheduling system application
solutions 4. Water pipe network monitoring system 5. Reservoir automatic monitoring
system
Oil industry: 1. Oil and gas well remote monitor 2. GPRS remote oil field automation
monitoring system 3. Gas pipeline network monitoring system solutions
Municipal industry: 1. Street lamp remote monitoring management 2. Pipe network
remote monitor 3. City energy consumption monitor
Environmental protection industry: 1. Pollution source monitor 2. Atmospheric
environment monitor 3. Noise monitor 4. Dust monitor
Agricultural applications: 1. Greenhouse remote monitor 2. Aquaculture farmers
monitor 3. Water pump monitor and control
Other industries: 1. Warehouse monitor management 2. Elevator remote monitor 3.
Remote crane management system 4. Industrial energy consumption monitoring 5.
Gas station GPRS data acquisition system 6. GPRS weather information collection
system
1.2.Features
Easy to use, only configurate few parameters
Use MD251 industrial module
Support TTL/RS232/RS485 interface, choose before purchase
Using single module embedded protocol stack, no external CPU, higher stability
Embedded TCP/IP protocol stack and GPRS technology
Support remote parameters settings, can change IP, port, ect. by SMS
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Support GSM network, four frequency for global
Support public and APN network access
Can configure heartbeat pack data format, transmit interval, and keep connection
with server. Can configure log pack data format and automatically establish network
connection with server.
Support data length control, can set the length of single sending package and data
pack waiting time.
Support ALWAYS ONLINE mode, and dropped reconnect.
Completely transparent transmission, can take place of data transfer radio, no
changes needed on your original system
Use aluminum alloy case, shielding external disturbance effectively
Matched sucker antenna, convenient for customers install and use inside the iron
case
Support four frequency, can be used all over the world
1.3.Parameters
Working Voltage: 5-28v
Working current: max 1200mA
Working temperature: -20~75Celsius
Storage temperature: -40~85Celsius
Storage humidity: 5%~95%RH
MAX transmit consumption: GSM900 class4(2W)
DCS1800 class1(1W)
Working Frequency: 850/900/1800/1900MHZ
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2. Install
2.1.Packing list
RS232 version:
1. USR-GPRS232-701 with antenna * 1
2. Serial cable * 1
3. 12V1A power adapter * 1
4. User guide CD * 1
RS485 version:
1. USR-GPRS232-701 with antenna* 1
2. 12V1A power adapter * 1
3. User guide CD * 1
2.2.Size and Diagram
DTU can be used independently, which packaged in metallic casing. It is easy to install by
the fixed position of the hole on both side. Details as follows (unit: mm)
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PCB size: 80 * 50mm
2.3.Antenna and SIM Card Installation
The antenna use SMA female base. Revolve the SMA male head to DTU antenna base,
and ensure it is tightened, not to affect the signal quality.
When install or take out SIM card, firstly use a spike to insert the little yellow point on the
right side of SIM base, then SIM cutting ferrule is open. SIM card should be put into cutting
ferrule in first while installing, ensure metal face outside.
2.4.Power Supply
DTU is widely used in complex external environment. To adapt to its application and
improve working stability of system, it use advanced power technologies, users can use
our 5V 1A power adapter directly.
701 power supply ranges DC5~28V
2.5.Indicator Lamps
There are 3 indicators on DTU: “NET”, ”POW”, ”DATA”
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index name description
1 PWR On once power is on
2 NET State Module function:
Off Module is not running;
64ms On/800ms Off Module does not find the network;
64ms On/3000ms Off Module find the network;
64ms On/300ms Off GPRS communication;
3 DATA When TCP link is established, it will on
2.6.Serial Port Instruction
2.6.1. RS232 Definition
RS232 port use 9 pin, female hole. Only three lines are defined, the rest is empty.
Diagram 2-2 RS232 interfaces
ID Indicia Function Instruction
2 TXD Device data transmit RS232 level
3 RXD Device data receive RS232 level
5 GND Ground Communication
common place
Diagram 2-3 RS232 Pin description
In order to debug easily, serial cable will be supplied for customer to connected with PC
directly.
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2.6.2. RS485 definition
Please inform us before order if you need RS485 version.
DB9 connector is the same as RS232 port on above photo. As to 6,9 pin of RS485,
following function:
ID Indicia Function Instruction
6 485-A A pin of RS485 RS485 level
9 485-B B pin of RS485 RS485 level
Diagram 2-4 RS485 pin description
As to RS485 equipment,we supply a DB9 pin connector and case for users make RS485
cables by themself.
2.6.3. TTL definition
Please inform us before order if you need TTL version.
DB9 connector is the same as RS232 port on above photo, use pin1, pin4 and pin9,
following function:
ID Indicia Function Instruction
1 RXD Device data transmit RS232 level
4 TXD Device data receive RS232 level
5 GND Ground Communication common place
Diagram 2-5 TTL pin description
3. Parameter Configuration
3.1.Hardware Connection
Configuration
Before configuration, you need to connect DTU with PC by serial cable and power on.
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3.2.Parameter Configuration
Software: Configuration by software in CD. Easy to configurate through PC .
Command: Configuration by AT command. In this case, users just need serial
communication program.
Message: configuration by sending sms.
3.3.Software configuration
3.3.1. Software interface introduce
DTU access into AT command mode automatically after power on, within 2~40s,
users can set parameters by serial port; If not, DTU will access to working mode, you
need to set by sms after preparation of the GSM network.
Free setup software is supplied, double-click to run,
“USR-GPRS-DTU V1.0.exe”, reference as below:
Software instruction:
1) Select PC serial port which connected with DTU
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2) Serial port status: open closed
3) PC Baud rate( Default 115200 is okay. Will be modified according to (9) )
4) PC Parity bit/data/stop bit( Default value.Will be modified according to (10) )
5) Set DTU APN account
6) Set DTU destination IP or domain name
7) Set DTU network protocol
8) Set DTU destination port
9) Set DTU baud rate(Recommend default value 115200. If it is changed, the user also
need to modify the above baud rate of PC.
10) Set DTU parity/data/stop bit(Recommend default value . If it is changed, the user also
need to modify these above parameters of PC)
11) Set DTU ID
12) Set DTU heartbeat format
13) If specified need automatic reconnection when start the network link, then after the
link is accidentally disconnected, waiting for <interval> seconds, will reestablish the
server connection. This configuration effective for client only.
If specified need sending heartbeat packet when start the network link, in links space
<interval> seconds, will automatically send heartbeat packet to server. This configuration
effective for client only.
14) Device receive<waiting data size> bytes data, immediately sent to connected server.
15) When serial port receive less <wait for data size> bytes data, and the module waiting
for <waiting data timeout> milliseconds later, still didn't receive serial data, then will
start sending buffer data.
16) Restore default configuration
17) Read current configuration
18) Save current settings
19) Message area, show configuration information
3.3.2. Software operation
Configuration instruction
1. If you have already set up the IP and port number, after powering on, the power
indicator light, the network indicator starts to flash quickly, when find network, the network
indicator flashes once per second, then start mount GPRS network now. The network
indicator flashes quickly, if you find the network in about 10-30s, then the network
indicator flash quickly and the DATA indicator light and start flashing. It express that the
device access to DTUGPRS transparent transmission mode.
2. 2s later after DTU powered on, you can make AT command configuration within 2~30
seconds
Operation:
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Make sure serial cable connected with PC, software running and serial port opening.
When DTU powered on again, it will show:
“+BATS: 0
@@Ver:V01_B01_025-DTU-01, Build Time:2012/12/27 14:08”
When it shows “device started, please finish read and configuration within 15 seconds”,
then click "configure all parameters” (This operation should be finished before DTU mount
GPRS, about 10-30 seconds. During this time, you can make the operation of reading,
configuration; If overtime, you will need power on and operate again)
3.4.AT Command Configuration
Open serial testing software, and serial port corresponding with PC, power on again, the
same steps as “3.3.2 software operation”. AT commands please refer to “6. AT commend
instruction”
3.5.Message Configuration
In the case of GPRS network have been mounted by DTU, send short messages to
configure, steps as follows:
1. Change IP
Message content
111888,setip:0,<ipaddr>
For example, IP is 182.32.116.166
So message content is 111888,setip:0,182.32.116.166
Return: SETIP OK
2. Change port
Message content:
111888,setport:0,<port>
For example, port is 7100
So message content is 111888,setport:0,710
Return: SETPORT OK
3. Inquiry DTU parameter
111888,status
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4. Change Bund rate
111888,setbaud:115200
5. Restart DTU to work with new configuration
111888,reset
Return: RESET OK
When receive the correct return after sending messages, you need to send “command 5”
(restart module to work with new configuration), then the device will work in your settings.
4. Public IP Instructions
DTU data can not be sent to device which has not been connected to internet or intranet.
So public IP must be used in DTU application. Following is the description of public IP
Public IP is the address that the online PC obtained from Internet. PC with public IP and
PC on Internet can access to each other.
NAT(Network Address Translator) realize intranet IP interconversion with public IP,
transform mass intranet IP to one or less public IP addresses separately, to reduce the
occupation of public IP address. The most typical application of NAT: In LAN, only need
one computer connected to the Internet, you can use NAT to share Internet connection,
made other computers in LAN can also surf the Internet. With NAT protocol, computers in
LAN can get access to the computers on Internet, but computers on Internet cannot
access to computers in LAN.
On windows operating system, the software of Internet connection sharing, sygate,
winroute, unix/linux natd etc. all use NAT protocol to share Internet connection. The
intranet internet access mode provided by ISP(Internet Service Provider) is based on NAT
protocol.
The classification of public IP address
Class A: From 1.0.0.0 to 127.255.255.255, assigned to large network which has a large
number of hosts but with fewer LANs.
Class B: From 128.0.0.0 to 191.255.255.255, generally used for international companies
and government agencies
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Class C: From 192.0.0.0 to 223.255.255.255, generally used for small companies,
campus network and research institutions,etc
Class D: From 224.0.0.0 to 239.255.255.255, used for special purpose, also called
“broadcast address”
Class E: From 240.0.0.0 to 255.255.255.255, Temporary retention
To judge if the computer has a public IP, you can operate like this to check:
Start- Run- input CMD- then Enter- input ”ipconfig/all”. As following picture: 180.186.12.99
is belong to Class B, it is an effective public IP address.
Generally, we can distinguish whether the IP is public IP through following method:
Usually, the machine that Telecom and Netcom through adsl dial-up obtain IP
address, it should be public IP; Railtom broadband has NAT address translation, not
public IP.
Cable modems for dial-up Internet IP address, also public IP.
GPRS wireless card (for laptop wireless Internet), the IP is Mobile GPRS internal IP,
but because for GPRS DTU, they are from the same network, so they can also be
used for connectivity.
If users access to Internet through a router, and the router address is not the public IP
through NAT translation, then we can adopt router port mapping, so the data can be
forwarded through a router to your computer (Specific application diagram reference
to chapter 5.2)
If the machines IP is dynamic public IP, means the Internet IP is not fixed, it requires a
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dynamic DNS software installed on the PC. DTU support DNS, so as long as users’
applying domain name remains the same, DTU can also connect with them. There
are many free DNS and domain name of the companies now, such as PeanutHull and
Secco communication software.
If your public IP address problem has been solved, so your PC will have the condition
as DTU data collection center, then you can test and use DTU.
5. Application Environment Testing
There are three application environment testing, as belows:
1. The application of public network server
2. The application of router transit
3. The application of server transit
5.1.Application of Public Server
1．Testing target: Server software and local device can be in two way transmission
by DTU
2．Testing request: DTU serial port connected with PC serial port
3．Testing tool: USR-TCP-232-Test debugging tool, DTU
4．Testing environment: Target server IP “180.186.12.99”, Listening port”9696”,
protocol”TCP”
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Note: Here we use USR-TCP232-Test to simulative network server
5．Configuration
Note: We use China Unicom SIM Card, so it should be “UNINET”
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Power on and configurate DTU to, set the destination IP to server IP, destination port to
server port, and baud rate default, then close the setup software. Open
USR-TCP232-Test, start the serial port that connect with DTU(Mine is Com1)
Click “Send”, the server displays:
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Already received data from DTU, click “send” on server side
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The local can also receive data from server
5.2.Application of Router Transit
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1．Testing target: DTU send data to router, then router forward the data to destination
PC
2．Testing request: DTU serial port connected with PC serial port
3．Testing tool: USR-TCP-232-Test debugging tool, DTU
4．Testing environment: Given router public network IP “60.208.252.67”, and has
been set “port forwarding”. Forward port 9696 to the destination PC. Log in router page
and set, for example, we use D-LINK router, steps: “ Internet connection” -->”Advanced”,
as following picture:
Restart router after finish settings.
5．Configuration
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Set destination IP to router public network IP, remote port “9696”, net protocol “TCP”.
Power on DTU again, click “Write All Config”, then close the software.
Open USR-TCP232-Test, as follows:
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