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SMT Serial UART to GSM GPRS Module
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Buy it now $31.5 USD include $25 shipping cost. |
Unique Features
1.Support Four frequency: 850/900/1800/1900Mhz
2.Support Httpd Client
3.Support GSM/GPRS and 2G/3G/4G card, but don't support 3G/4G network
4.Support Remote Configuration via SMS
GPRS Module Download
User Manual: USR-GM3
Evaluation Kit: USR-GM3-EVK
Client Support Center: submit your ticket at h.usriot.com If you have technical problems about the product.
GPRS Module Introduction
This is a serial uart to gprs module,used for data transparent transmission.USR-GM3 is highly-integrated UART to GSM/GPRS module.Users can easily make communication with it among serial device,cellphone and network device.USR-GM3 is an embedded GSM module. It is designed for embedded system, and it is so small and convenient that you can integrate it to your system easily.
GPRS Module Feature
- Small and completed function GPRS DTU, transmission between serial and GPRS
- Support GSM850/900,DCS1800/1900
- Support GSM/GPRS and 2G/3G/4G card, but don't support 3G/4G network
- Support 2 sockets, Support TCP and UDP
- 4KB cache for each of sockets, user can choose to cache data or not
- Support register packet and heartbeat packet
- Support setting parameters via SMS message
- Support 3 work modes: SMS transmission mode, network transmission mode and HTTPD mode
- Support basic and extend AT command sets
- Support class RFC2217, can dynamically modify serial parameter of module via network
- Support flow control: RTS/CTS
- Support RS485
GPRS Module Parameter
| Parameter | Value |
| Working Voltage | DC 3.4 ~ 4.2V, recommend: 3.8V |
| Working Current | Average: 55 ~ 90mA; Max: 750mA |
| Working Temperature | -25 ~ 85°C |
| Storage Temperature | -40 ~ 125°C |
| Storage Humidity | 5 ~ 95% RH |
| Max Launch Power | GSM900 class4 (2W), DCS1800 class1 (1W) |
| Working Frequency | 850/900/1800/1900MHz |
| Size | 27.9 x 24 x 3 mm |
| Network Protocol | TCP, UDP, DNS, Http |
| Packing List | USR-GM3*1 |
GPRS Module Structure
GPRS Module Images
| 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 / HTTPD |
| Network Protocol | TCP,UDP,DNS,Http |
| Network Buffer | Send: 4K bytes, receive: 4K bytes |
| Serial | |
| Port Number | 1 |
| Interface Standard | TTL: SMT 2.8 ~ 3.6 V |
| Data Bits | 7,8 |
| Stop Bit | 1,2 |
| Check Bit | None,Even,Odd |
| Baud Rate | 2400 bps ~ 921600 bps |
| Flow Control | CTS/RTS |
| Buffer | Send and receive 4k bytes respectively |
| Device Interface | |
| SIM Card | 1.8V / 3V |
| Speech Interface | 1 channel MIC input, 1 channel SPEAK output |
| Software | |
| Virtual Serial（USR-VCOM） | Windows 2000 or higher(32 bit/64 bit) |
| Configuration | Serial AT command, sms AT command, network AT command |
| Basic Parameter | |
| Size | 27.9 x 24 x 3 mm |
| Operating Temp. | -25 ~ 85°C |
| Storage Temp. | -40 ~ 125°C, 5 ~ 95% RH(no condensation) |
| Input Voltage | DC 3.4 ~ 4.2V, recommend: 3.8V |
| Working Current | Average: 55 ~ 90mA; Max: 750mA |
| More | |
| Warranty | 2 years |
| Accessory | null |
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User Manual
[Datasheet] USR-GM3 Datasheet | download
[User Manual] USR-GM3 Hardware Manual | download
[AT Command] USR-GM3-AT-Command-Set_V1.0.2 | download
[User Manual] USR-GM3 User Manual V1.08 | download
Development File
[PCB Library] USR-GM3 PCB Library File | download
[Demo Code] TCPIP Demo Code | download
Application Software
[USR-VCOM] Virtual Serial Software V3.7.2.525 | 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
[CE Certificates] USRIOT 2G Wireless Module CE Certificates | download
Company File
