Pin-type GPRS modules USR-GPRS232-7S3 can realize the bidirectional transparent transmission function of UART to GPRS.

● Support public and APN network access
● Support heartbeat, Always Online mode, can keep connection with server
● Support KEEP-ALIVE, to maintain connection if there is no heartbeat packet
● Support network connection in Max 4 Channel, can send data from serial port to different servers
● Support SMS AT Command mode
● Support SMS transparent transmission, Network transparent transmission, httpsD, UDC and other working modes

Introduction of Cost-effective UART GSM Modules
Cost-effective UART GSM Modules USR-GPRS232-7S3 are used for data transparent transmission, which are highly-integrated UART to GSM/GPRS modules. Users can easily make communication with it among serial device, cellphone and network device. USR-GPRS232-7S3 is based on USR-GM3 gprs module. Clients can use the product to realize bidirectional transparent transmission from serial port to network through simple AT command.

Features of Cost-effective UART GSM Modules USR-GPRS232-7S3
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 multi work modes: SMS transmission mode, network transmission mode and httpsD 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

Parameter Name	Parameter Value
Bus	serial, GPRS, GSM, UART
Other characteristics	data transmission