USR-GM3 is a low power transmission GPRS module, which realizes the function of bidirectional transmission from UART to GPRS. Support GSM/GPRS network; Supports four network links online at the same time, and supports TCP/UDP Client. Send registration packet/heartbeat packet data; Support SMS setting module parameters; Support SMS transparent transmission, network transparent transmission, HTTPD, UDC and other working modes; Supports low-power mode and FTP remote upgrade.
Low power mode
Efficient use of battery life to improve device performance efficiency
Secure transmission
Customize registration packets and heartbeat packets
LBS base station positioning
The location information obtained through the base station makes up for the GPS affected by weather and so on
Open SDK
Summarize all kinds of tool resources to improve development efficiency
Wireless parameters | Wireless standards | GSM/GPRS |
Standard frequency bands | 850/900/1800/1900MHz quad band | |
Transmit power | GSM900 class4(2W) | |
DCS1800 class1(1W) | ||
GPRS Terminal Device Class | Class B | |
GPRS Multi-slot Class | GPRS Class 10 | |
GPRS Coding Schemes | CS1 ~ CS4 | |
Antenna options | I-PEX interface | |
Hardware parameters | Data interface | UART：2400bps - 921600bps |
Operating voltage | DC 3.4V~4.2V | |
Operating current | Average 55mA-90mA maximum: 750mA | |
Operating temperature | -25℃- 85℃ | |
Storage temperature | -40℃-125℃ | |
Size | 27.9×24.0×3.0mm | |
Software parameters | The type of wireless network | GSM/GPRS/EDGE |
Working mode | Transparent transmission mode, SMS transparent transmission mode HTTPD mode, UDC mode | |
Set commands | AT+ command structure | |
Network protocols | TCP /UDP/ DNS/HTTP | |
Maximum number of TCP connections | 4 | |
User configuration | Serial AT commands, network AT commands, SMS AT command | |
Customer application software | Support customer-specific application software | |
Software Features | DNS domain name | In the tank |
Simple transparent transmission method | TCP client and UDP client are supported | |
HTTP protocol transmission | In the tank | |
Transparent text message transmission | In the tank | |
Heartbeat packets | In the tank | |
Class RFC2217 | In the tank | |
Enrollment package mechanism | Custom/ICCID registration packages are supported |
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Q How to make a payment?
E****R 18/11/2024
A We accept various payment methods including bank transfers, credit cards, and PayPal. Please refer to our payment page during checkout for detailed instructions on how to complete your payment. If you have any questions or need assistance with payment, please contact our customer support team.
18/11/2024
Q How will the products be shipped?
T****k 16/08/2024
A We ship products through reliable courier services such as DHL, UPS, and FedEx. Shipping fees and delivery times may vary depending on the destination. You will receive a tracking number once your order has been dispatched, allowing you to track the status of your shipment. Please note that shipping times may vary based on location and availability.
16/08/2024
Q How is warranty provided?
L****Y 08/05/2024
A We offer a warranty on all of our products. The warranty period and conditions vary depending on the product category. For specific warranty information, please refer to the product page or your purchase agreement. If you encounter any issues with a product during the warranty period, please contact our customer service team with your proof of purchase, and we will guide you through the warranty claim process.
08/05/2024
