USR-GM3 UART to GSM/GPRS Module TTL to GPRS Bi-directional Transmission

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USR-GM3 UART to GSM/GPRS Module TTL to GPRS Bi-directional Transmission

Price: $15.13
SKU: 116970
Price in points: 151 points
Points: 1 points

USR-GM3 UART to GSM/GPRS Module TTL to GPRS Bi-directional 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.

- Small and completed function GPRS DTU, transmission between serial and GPRS
- Support GSM850/900,DCS1800/1900
- Support GSM/GPRS/EDGE and 2G/3G/4G,2G traffic
- Support 2 sockets, Support TCP and UDP
- 4KB cache for each of sockets, user can choose to cache data or not
- Support register package and heart beat package
- Support setting parameters via SMS message
- Support 4 work modes: SMS message transmission mode, network transmission mode and HTTPD mode
- Support basic and extend AT command sets
- Support similar RFC2217
- Support flow control: RTS/CTS
- Support RS485

- Built-in Antenna Interface
- Httpd Client(Click to learn the function of Httpd Client);
- Two Network Links : GM3 can build TCP link with two target servers and send the same data;
- SMS Transmission : TTL can directly output SMS content;
- SMS Configuration : telephone sends SMS to configure GM3;
- Send SMS : apply to application of SMS alarm;
- Hardware Flow Control : RTS/CTS;
- Register Package Mechanism : convenient for server to identify device;
- Heartbeat Package Mechanism : guarantee normal network connection;
- Baud Rate Sync : support rapidly set up serial baud rate though network command;
- Built-in SIM Card : GM3S,the next generation of GM3,will come with SIM card.
- Open SDK : User can customize function according to their own requirements.

Wide Applications
GM3 can apply to application which can process remote data interaction in no network environment.
Temote Data Acquisition
Apply to : electricity checks meter system,communication power distribution system and coal mine safety monitoring
Remote Control
Apply to : Residential intelligent control, elevator remote control system and water supply dispatching system.
Remote Alarm
SMS alarm control system such as gas detect,fire alarm and unlawful entry.


- 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,Httpd client
- Network Buffer: send : 4K bytes,receive : 4K bytes

- 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

- Virtual Serial(USR-VCOM):  Windows 2000 or higher(32 bit/64 bit)
- Configuration: computer set-up software,serial command,sms command,network command

Basic Parameter
- Size: 27.94 x 24 x 4.4 mm
- Operating Temp.: -25 ~ 85°C
- Storage Temp.: -40 ~ 85°C,5 ~ 95% RH(no condensation)
- Input Voltage: DC 3.4 ~ 4.2V,recommend : 3.8V
- Working Current: Average : 55 ~ 90mA;Max : 750mA

Package included:
- 1* USR-GM3 GPRS Module

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