USR IOT USR-GM1 User manual

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USR-GPRS232-DTU USR MANUAL
For Models：
USR-GM1
USR-GPRS232-7S2
USR-GPRS232-701-2
USR-GPRS232-701-4
USR-GPRS232-710
File Version：V3.1

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Copyright Notice
Copyright © Jinan USR IOT Technology Limited. All rights reserved.
ECA written permission of the Company and any unit or individual shall not extract and copy the contents of this
document in part or whole, is not transmitted in any form.
NOTE
As the product version upgrades or other reasons, this document is subject to change without notice. Due to
normal use of the product depends on the network environment, SIM card status, server status, a number of factors, and
can not be determined in accordance with this document, the operation must be able to perform a given function.
Unless otherwise agreed, this document only as a guide, all statements in this document, information, and
recommendations do not constitute any kind, express or implied, including fitness for a particular purpose,
merchantability or any patent, copyright or Other tort liability and other intellectual property rights are not secured by.
The Company may at any time on product specifications and product descriptions to make changes without notice.
This product may contain design defects or errors, once discovered their income errata, which may cause the product to
deviate from published specifications.

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1. Instructions before use:
1.1 Basic introduction
Jinan USR IOT Technology Limited (: USR). networking products company focused on the field of networking.
the main serial servers, Ethernet to serial, GPRS DTU, embedded WIFI module. The company has a strong R & D team
of embedded hardware and software, mobile application development and server application development team. we can
provide customers with OEM and ODM services.
GPRS product model described in this document are based on USR-GM1 core module development comes with
the same features, the difference between the different models that range of aspects of power, data interfaces.
The following is the product model abbreviation:
USR-GM1
GM1
USR-GPRS232-7S2
7S2
USR-GPRS232-701-2
701-2
USR-GPRS232-701-4
701-4
USR-GPRS232-710
710

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1.2 Product Testing
This document provides an example of how to set parameters of the product examples. A Case Study in 7s2.
We provide a server to do the testing.
Server Information
Domain name: www.usr.cn
Port: 2317
Protocol type: TCP
the serial port parameters
Baud rate: 115200
Data bits: 8
Parity: NONE
stop Adults: 1
1, test preparation:
a) Open Data enabled SIM card

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b) DC12V power supply (7S2 can be used DC9 ~ 18V power supply can be used, 701 and 710 can be used DC9 ~ 28V
power supply);
c) USR-GPRS232-7S2 module& Evaluation board;
d) GPRS antenna

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e) Serial port extension cable (If the pc don’t have RS232 interface，you need a USB to RS232 adapter );
f) computer, USR-TCP232-TEST Software.

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2. The 7S2 module into the evaluation board, in the correct direction. The SIM card is inserted 7S2 module in the
correct direction.
3. The antenna is connected to the 7S2 module.

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4. Connect the RS232 serial port (or USB to RS232 serial port),open the USR-TCP232-TEST software.

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5. Supply power
6. LED Status
NET: work instructions, NET has been flashing after the module starts, in the absence of network activity slow
flash (flash once for about 3 seconds), when there is network activity (telephone / Internet) Flash (about 0.7 seconds);
DATA: Data connection instructions, DATA lamp module connections to the server after the light, and the server is
disconnected Jimie, if the data transmission, DATA flashes about;
POW: Power indicator, when the power supply to the module, POW lights;
7. serial data receive

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8. the test is completed, the parameter settings
If you strictly follow the above eight steps for the product tested, customers can send and receive normal data (as
shown in the screenshot Step 7).
Now product testing has been completed, users can follow their own needs to set parameters for the product and
use.
If you can not get the final result as shown in Step 7, check:
A.SIM card is delinquent / Invalid data traffic.
B.SIM card is inserted, reinsert the SIM card and test.
C.serial cable is properly connected, the computer serial port driver is installed OK.
D.power supply is normal.
E.antenna is connected.

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1.3 Document describes
For customers for the product corresponding to the type required product information, download links
listed below in order to use the information.
Software Name: USR-TCP232-TEST
Software features: You can make network debugging serial debugging assistant and assistant to use.
Download Link: http://www.usriot.com/Download/199.html
Software Name: DTU Setting Software
Software features: GPRS products for parameter setting and modification.
Download Link: http://www.usriot.com/Download/113.html
Software name: Virtual Serial Port Software
Software features: network data into a virtual serial data port for software development based on the use.
Download Link: http://www.usriot.com/Download/31.html
File name: GPRS products used AT command set
Download Link: http://www.usr.cn/Download/188.html
File name: GPRS products extended AT command set
Download Link: http://www.usr.cn/Download/187.html
File name: USR-GPRS232-7S2 library files and hardware design manual
Download Link: http://www.usr.cn/Download/141.html
File name: USR-GM1 library files and hardware design manual
Download Link: http://www.usr.cn/Download/134.html
If you need more information and product information,
please visit : http://www.usriot.com/Product/cat-68.html
Or http://www.usriot.com/Product/cat-10.html

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Contents
USR-GPRS232-DTU USR MANUAL...............................................................................................................................1
1. Instructions before use:.......................................................................................................................................... 3
1.1 Basic introduction...................................................................................................................................... 3
1.2 Product Testing...........................................................................................................................................4
1.3 Document describes..................................................................................................................................11
Contents......................................................................................................................................................................12
3 Product Introduction............................................................................................................................................. 13
3.1 Features........................................................................................................................................................ 13
3.2 Product Features......................................................................................................................................... 14
3.3 Hardware Introduction...............................................................................................................................15
4 Set Methods.............................................................................................................................................................18
4.1 Use AT command set parameters.............................................................................................................. 18
4.2 setup software to set parameters............................................................................................................... 19
4.3 Other setting methods.................................................................................................................................20
5 operating modes Introduction...............................................................................................................................23
5.1 Data passthrough mode.............................................................................................................................. 23
5.2 Serial Command Mode...............................................................................................................................26
5.3 AT command mode......................................................................................................................................26
5.4 HTTPD CLIENT mode.............................................................................................................................. 27
5.5 SMS passthrough mode........................................................................................................................... 30
6 Application Chart...................................................................................................................................................32
6.1 There are a public network server applications.......................................................................................32
6.2 router class public transit server applications......................................................................................... 33
6.3 virtual serial port for remote applications................................................................................................33
7 FAQ..........................................................................................................................................................................35
Module does not send a message to the serial port after power................................................................... 35
Module constantly reboot................................................................................................................................. 35
Unable to establish a network connection module starts..............................................................................36
Modules can not be configured through the serial port parameters........................................................... 37
Contact........................................................................................................................................................................38
Update History...........................................................................................................................................................38

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3 Product Introduction
3.1 Features
1. Quad-band world wide (850/900/1800 / 1900MHz);
2. Support operators such as GSM / GPRS / EDGE network.
3. Support public network / APN private network access, supported by a dedicated network APN specify the local
port number;
4. Support multiple network connections at the same time online, maximum support 4-way network connection,
easy to use multiple data centers;
5. KEEP-ALIVE mechanism to support and enhance the stability;
6. Each TCP connection support under 15K data cache, the data used to enhance stability
7. support any formatting registration packet / heartbeat packet data;
8. No long-time support data transmission module automatically restart (set less than 600 seconds when the
automatic restart function is disabled);
9. Support Remote SMS set module parameters (SMS setting parameters supports password authentication to
prevent unauthorized users to set parameters and spam messages interference), support for remote server setup
parameters (can be turned on / off this feature);
10. Support multiple operating modes.
11. GSM07.07 AT command set support, support for custom instruction set extensions (AT command mode is
available);
12. Supports the use of the extended instruction set to establish, maintain and close network connections, increase
application flexibility;
13. Supports synchronous baud (class RF217) function can be dynamically modify the device baud line with the
company to use the virtual serial port software;

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3.2 Product Features
300 to 115200 baud rate can be set, serial parameters (data bits, stop bits, parity) can be set
Operating voltage: 7S2 Module 9 ~ 18V; 701/710 module 9 ~ 28V
Current: average 50 ~ 200mA; maximum 1000 mA / 12V
Working temperature: -40 ~ + 80 °C
Storage Temperature: -40 ~ + 85 °C
Storage humidity: 5% ~ 95% RH
maximum transmit power: GSM900 class4 (2W), DCS1800 class1 (1W)
LED: 3 LEDs (POW, NET, DATA), respectively, indicate power, work status, connection status
status and control pins: 7S module supports switch, WORK, LINK, LINK1 ~ LINK4, audio input / output;
transparent mode supports TCP / UDP transport protocol, user flexibility to use other modes
Serial level: 7S2 module supports 3.3V TTL level (disable access 5V level), 701 module supports RS232 /
RS485 interface in two versions, 710 module supports RS232 / RS485 adaptation.

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3.3 Hardware Introduction
3.3.1 USR-GM1
USR-GM1 is a patch-embedded GPRS module, our DTU products are based on this, peripheral circuits and so on
GM1 module details, please refer to the USR-GM1 hardware design manual.
USR-GM1 download link hardware design manual and package library: http://www.usr.cn/Download/134.html
Parameters
Description
measurement
24*24*2.9mm
POW
Power 3.6 ~ 4.2V; 3.8V standard values
Interface
POWER/SIM/WORK/LINK/UART/AUDIO/RF
3.3.2 USR-GPRS232-7S2
USR-GPRS232-7S2 is a forward-compatible USR-GPRS232-7S (discontinued) embedded GPRS module, built-in
DC-DC converter circuit can support 9 ~ 18V power supply; after the demolition onboard DCDC converter circuit
inductance wheeling You can use DC5V plus buck diode (recommended model 1N4007) way directly to the VCAP pin
power supply to use DC5V power supply.
Users can also use the battery, after the removed board power inductors。
USR-GPRS232-7S2 peripheral circuit requirements, hardware and other detailed information, refer to the
USR-GPRS232-7S2 hardware design manual.
USR-GPRS232-7S2 download link hardware design manual and package library:
http: //www.usr.cn/Download/141.html
Parameters
Description
measurement
45*32*14mm
POW
VCAP Power supply:3.6~4.2V；VCC power supply:9~18V；
PORT
POWER/WORK/LINK/UART/AUDIO
Antenna
IPEX antenna connector fittings
3.3.3 USR-GPRS232-701
701-2 which use 5.5 * 2.1 round hole fittings supply, DB9 female data interface; 701-4 using 3.81-2 pluggable
terminal powered 3.81-3 pluggable terminal data interface.
The models made of aluminum alloy shell (user orders can not use the shell as long as the internal PCB board), the
screw hole location to install, suitable for installation in the chassis.
参数
详细描述
POW
9~18V；
PORT
POWER/RS232/RS485
Antenna
SMA antenna connector inside the outer screw hole

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Product Size :
Without housing product positioning holes and dimensions:

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3.3.4 USR-GPRS232-710
USR-TCP232-710 with RS232 interface and RS485 interfaces. Users do not need to switch modes, fully adaptive.
RS232 data interface with DB9 female connector. RS485 interface for pluggable terminal 5.08-3 data interface.
The models of high quality housing Adam, with rail mounting guides for rail mounting use.
Parameters
Description
measurement
103 * 72 * 30mm
POW
9~18V；
PORT
POWER / RS232 / RS485
Antenna
SMA antenna connector inside the outer screw hole
Products shown:

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4 Set Methods
4.1 Use AT command set parameters
USR-GPRS product family supports standard AT command set, and it was extended AT command set, you can use
the command module of the operating parameters to be set. Users can use the serial debugging assistant to send
commands to set the module parameters.
AT command set download link: http: //www.usr.cn/Download/187.html

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4.2 setup software to set parameters
USR-GPRS products have a dedicated set of software module parameters are set, the user can set the software
products that do DTU parameter setting, serial data debug and other operations.
Set software download link: http: //www.usr.cn/Download/113.html
Setup software consists of five parts:
APN information common parameter setting area is used to set the DTU work, serial port parameters and
operating modes.
Operating mode corresponding parameter setting area is used to set the parameters corresponding to the operating
mode.
Provides the setting function button area / reading parameters, and the Send button to send commands to restart
the test information by sending a window.
Serial reception window to receive information sent from the DTU to the serial port of the computer data;
Serial messaging window can be edited through the serial data is sent to the DTU.

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About the meaning of the module parameters that can be set, refer to " operating modes Introduction "
Description chapter.
4.3 Other setting methods
DTU in the data transfer mode, supports SMS AT command set to send information / check work status / query
operations such as setting parameters, send AT commands via SMS to DTU, DTU will be like in the serial execution of
AT commands sent by the user to perform the same command and returns SMS report the results.
DTU After enabling serial AT command / network AT command functions, you can use SMS to send AT
commands similar format to use the serial / network to send AT commands, similar to the effect of the
implementation of the serial port to send commands directly.
SMS AT commands:
SMS AT commands, the format is "PSW, CMD", PSW indicates the password, CMD, said specific instructions,
PSW's factory default setting is "admin", and the CMD command refer to the "USR-GPRS232-DTU-AT command set"
and the other on describes instructions.