RS232 RS485 Serial to GSM GPRS Modems

RS232 RS485 Serial to GSM Modem

Model: USR-GPRS232-730

USR-GPRS232-730 is a RS232 RS485 to GSM GPRS modem, which used for data transparent transmission based on 2G Network.
  • 1 RS232 serial port and 1 RS485 serial port (not use simultaneously)
  • Power: 5V~36V
  • Quad-Band GSM/GPRS 850/900/1800/1900MHz
  • Flow Control: CTS/RTS
  • Transparent mode(TCP/UDP)/HTTP client/SMS mode

RS232 RS485 Serial to GSM GPRS Modems

General Details

Introduction of RS232 / RS485 GSM Modem

USR-GPRS232-730 GSM Modem / GPRS DTU (Data Transfer Unit) is a wireless terminal equipment which can convert serial data to IP data or convert IP data to serial data through gprs /GSM network. 730 is based on USR-GM3. Clients can use this product to realize bidirectional transparent transmission from serial port to network through simple AT command.

Introduction of RS232 / RS485 GSM Modem


Port of  RS232 / RS485 GSM Modem

 Port of RS232 / RS485 GSM Modem


Features of RS232 / RS485 GSM Modem

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 HTTPD mode

Support basic instruction set and extension instruction set

Hardware flow control RTS/CTS


Functions of RS232 / RS485 GSM Modem

Network Transmission

Bidirectional transparent transmission between modem and network

Network Transmission of RS232 / RS485 GSM Modem


HTTPD Client 

Support serial data HTTP(GET/POST) to submit to the specified server.

HTTPD Client of RS232 / RS485 GSM Modem


SMS Transmission

To achieve transparent communication between mobile phones and serial devices.

SMS Transmission of RS232 / RS485 GSM Modem


At Command

Support AT command query and set the parameters via- serial, network, SMS.

At Command, RS232 / RS485 GSM Modem


Application of RS232 / RS485 GSM Modem

Data Acquisition of Intelligent Electricity

Data Acquisition of Intelligent Electricity, Application of RS232 / RS485 GSM Modem


Real-time Data Transmission of Charging Piles

Real-time data transmission of charging piles, application of RS232/485 GSM modem


Environmental Monitoring of Agricultural Networking

Environmental Monitoring of Agricultural Networking, application of RS232/485 GSM modem


Real-time Data Collection of Urban Public Transport

Real-time Data Collection of Urban Public Transport, application of RS232/485 GSM modem

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 


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
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
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
Warranty 2 years
Accessory 12V1A power, serial line, GPRS sucker antenna

How to Buy

Official Online ShopClick to order USR-GPRS232-730
Alibaba Online ShopClick to order USR-GPRS232-730
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