USR-GM3 is highly-integrated UART to GSM/GPRS module, Users can easily make communication with it among serial device,cellphone and network device.
SMD Type
Built-in SIM Card
Operation temperature Range of -25° ~85°
Quad-Band GSM/GPRS 850/900/1800/1900MH
Introduction of Low Power Gsm Modules
The Low Power Gsm Modules, used for data transparent 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.
Product Features of Low Power Gsm Modules
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Small and completed function GPRS DTU, transmission between serial and GPRS
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Support GSM850/900,DCS1800/1900
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Support GSM/GPRS/EDGE and 2G/3G/4G card, but don't support 3G/4G network
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Support 2 sockets, Support TCP and UDP
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4KB cache for each of sockets, user can choose to cache data or not
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Support register package and heart beat package
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Support setting parameters via SMS message
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Support 3 work modes: SMS message transmission mode, network transmission mode and HTTPD mode
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Support basic and extend AT command sets
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Support class RFC2217, can dynamically modify serial parameter of module via network
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Support flow control: RTS/CTS
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Support RS485
Application Field of Low Power Gsm Modules
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Power industry: power remote meter reading, substation monitoring, power line monitoring
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Municipal industry: street lamp remote monitoring management, pipe network remote monitoring, urban energy consumption monitoring
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Oil industry: remote monitoring of oil-gas well, GPRS remote oilfield automation detection monitoring system, Gas pipe network monitoring system solutions
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Environmental protection industry: pollution sources monitoring, atmospheric environment monitoring, noise monitoring, dust monitoring
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Agricultural application: greenhouse remote monitoring and management, aquaculture monitoring management, agricultural water pump monitoring management
Structure of Low Power Gsm Modules
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Built-in Antenna Interface
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Httpd Client
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Two Network Links: GM3 can build TCP link with two target servers and send the same data;
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SMS Transmission: TTL can directly output SMS content;
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SMS Configuration: telephone sends SMS to configure GM3;
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Send SMS: apply to application of SMS alarm;
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Hardware Flow Control: RTS/CTS;
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Register Package Mechanism: convenient for server to identify device;
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Heartbeat Package Mechanism: guarantee normal network connection;
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Baud Rate Sync: support rapidly set up serial baud rate though network command;
Work Mode of Low Power Gsm Modules
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