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.

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