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/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