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Serial GSM Modems USR-GPRS232-730

RS232 RS485 Serial to GSM Modem


SKU: Serial GSM Modems USR-GPRS232-730 Categories: ,


GSM Modem USR-GPRS232-730 Introduction of Serial GSM Modems

GSM Modem USR-GPRS232-730 industrial serial to IP cellular GPRS modem USR-GPRS232-730 can convert the serial data RS232/485 into IP data and then transfer to data center through GPRS 2.5G mobile network.

Features of GSM Modem USR-GPRS232-730

  • 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.

Basic Functions

  • 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.


  • 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.


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, https
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



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