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Product Name:GSM GPRS Modules
When USR-GM3 module works as TCP CLIENT, and after TCP connection is established, module will automatically send scheduled register packet to help TCP Server identify the TCP connection.
Register packet includes IMEI code, ICCID code and user-defined register data.
USR-GM3 connects with FTP server to remotely upgrade user’s devices such as charging pile, instruments and remote POS machine. Only custom firmware has this function.
Charging Pile Data Real-time Transmission Solution
City Bus Real-time Data Acquisition Solution
Remote POS Online Payment Solution
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 / httpsD |
Network Protocol | TCP,UDP,DNS,https |
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 | Serial AT command, sms AT command, network AT command |
Basic Parameter | |
Size | 27.9 x 24 x 3 mm |
Operating Temp. | -25 ~ 85°C |
Storage Temp. | -40 ~ 125°C, 5 ~ 95% RH(no condensation) |
Input Voltage | DC 3.4 ~ 4.2V, recommend: 3.8V |
Working Current | Average: 55 ~ 90mA; Max: 750mA |
More | |
Warranty | 2 years |
Accessory | null |