Usr USR-GPRS232-701 User manual

GPRS DTU User Manual V1.3 http://en.usr.cn
Jinan USR IOT Technology Limited Page 1 of 31 [email protected]
GPRS Data Transmit Unit
(USR-GPRS232-701)
File version: v1.6

GPRS DTU User Manual V1.3 http://en.usr.cn
Jinan USR IOT Technology Limited Page 2 of 31 [email protected]
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: