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

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

Introduction:
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.

Features:
- 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

Functions
- 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.

Specification:

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，Httpd client
- 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: 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
- 1* PCB antenna