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GSM GPRS Modem, serial rs232 rs485 to gsm DTU modem
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Introduction of GSM Modem RS232/RS485
Industrial Serial to IP cellular GPRS modem which convert the serial data RS232/485 into IP data and then transfer to data center through GPRS 2.5G mobile network. USR-GPRS232-730 is based on USR-GM3. Can use this product to realize bidirectional transparent transmission from serial port to network through simple AT command.
Port of RS232/RS485 Industrial Modem USR-TCP232-730
Features of RS232 / RS485 Cellular Modem USR-TCP232-730
RS232 or RS485 interface, can’t be used at one time
2G Frequency: GSM850/900,DCS1800/1900, 2G GSM/GPRS
Work Mode: TCP and UDP Client
Supports register packet and heartbeat packet
Can be remote configurated via SMS
Support multi work modes : SMS transmission mode,network transmission mode and httpsD mode
Support basic instruction set and extension instruction set
Hardware flow control RTS/CTS
Functions of RS232 / RS485 Modem GSM USR-TCP232-730
Network Transmission
Bidirectional transparent transmission between modem and network
httpsD Client
Support serial data https(GET/POST) to submit to the specified server.
SMS Transmission
To achieve transparent communication between mobile phones and serial devices.
At Command
Support AT command query and set the parameters via- serial, network, SMS.
Application of RS232 / RS485 M2M Modem USR-TCP232-730
Data Acquisition of Intelligent Electricity
Real-time Data Transmission of Charging Piles
Environmental Monitoring of Agricultural Networking
Real-time Data Collection of Urban Public Transport
Power industry: power remote meter reading, substation monitoring, power line monitoring
Municipal industry: street lamp remote monitoring management, pipe network remote monitoring, urban energy consumption monitoring
Oil industry: remote monitoring of oil-gas well, GPRS remote oilfield automation detection monitoring system, Gas pipe network monitoring system solutions
Environmental protection industry: pollution sources monitoring, atmospheric environment monitoring, noise monitoring, dust monitoring
Agricultural application: greenhouse remote monitoring and management, aquaculture monitoring management, agricultural water pump monitoring management
| Network | |
| Standard | GSM / GPRS |
| Rate | 14.4 Kbps ~ 57.6 Kbps |
| Standard Frequency Range | 850/900/1800/1900MHz |
| GPRS Multi-slot Class | GPRS Class 10 |
| GPRS Terminal Device Class | Class B |
| GPRS Coding Schemes | CS1 ~ CS4 |
| Max Launch Power | GSM900 class4 (2W), DCS1800 class1(1W) |
| Application | GSM standard AT instruction set / USR extension AT instruction set / data transmission / SMS transmission |
| Network Protocol | TCP, UDP, DNS, Http |
| Network Link Count | 4 |
| Disconnection Buffer | 4 x 15K bytes |
| Network Receive Buffer | 4K byte |
| Serial | |
| Port Number | 2 (1*RS-232, 1*RS-485, can not work at the same time) |
| Interface Standard | RS-232: DB9 cellular type, RS-485: 2 wire (A+, B-) |
| Data Bit | 5, 6, 7, 8 |
| Stop Bit | 1, 1.5, 2 |
| Check Bit | None, Even, Odd |
| Baud Rate | UART: 2400 bps ~ 921600 bps |
| Flow Control | RTS/CTS |
| Receive Buffer | 4K byte |
| RS-485 Pull-up and Pull-down Resistor | 2.2 KΩ |
| Device Interface | |
| Antenna Interface | 50Ω/SMA-K (female terminal) |
| SIM Card | 1.8V / 3V |
| Speech Interface | Null |
| Software | |
| Virtual Serial（USR-VCOM） | Windows 2000 or higher (32 bit/64 bit) |
| Configuration | Serial AT command, network AT command, SMS AT command |
| Basic Parameter | |
| Size | 80x 84 x 25（mm） |
| Operating Temp. | -25 ~ 85°C |
| Storage Temp. | -40 ~ 125°C |
| Input Voltage | DC 5 ~ 36 V |
| Working Current | Average: 22 ~ 45mA, Max: 201mA |
| More | |
| Warranty | 2 years |
| Accessory | 12V1A power, serial line, GPRS sucker antenna |
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User Manual
[Datasheet] USR-GPRS232-730 Datasheet | download
[Guide Line] USR-GPRS232-730 Guide Line | download
[User Manual] USR-GPRS232-730 User Manual | download
[AT Commands]USR-GPRS232-730&734-AT commands V1.0.0 | download
[SMS AT Command] How-to-send-AT-commands-by-SMS | download
Development File
[Demo Code] TCPIP Demo Code | download
Application Software
[USR-VCOM] Virtual Serial Software V3.7.1.520 | download
[USR-TCP-Test] Testing Software | download
[USR-TCP-Test_android] Testing Software | download
[USR-GM3] Setup-Software_V1.2.1.101 | download
Product Certificate
[CCC Certificate]CCC-Certificates-Wireless-Data-Terminal-2018 | download
[Certificate] Certificate for China Compulsory Product Certification | download
[CE Certificates] USRIOT 2G Wireless Module CE Certificates | download
Company File