Shandong USR IOT Technology Limited USRGM3 用户手册
USR-GM3/GM3s User Manual
Jinan USR IOT Technology Limited
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tec@usr.cn
Besides, customers need to configure socket A or socket B for network connection, refer to
chapter 4.1.2.3. After setting successful, restart GM3. When connection is establishing, If
device is idle for 30 seconds, GM3 will send string “www.usr.cn” to server via socket A and
socket B.
chapter 4.1.2.3. After setting successful, restart GM3. When connection is establishing, If
device is idle for 30 seconds, GM3 will send string “www.usr.cn” to server via socket A and
socket B.
4.4.
4.4.
4.4.
4.4. UART
UART
UART
UART
4.4.1.
4.4.1.
4.4.1.
4.4.1.RS485
RS485
RS485
RS485
4.4.1.1.
4.4.1.1.
4.4.1.1.
4.4.1.1.
Description
Description
Description
Description
GM3 module supports RS485 function. RS485 is half duplex, the direction of transmitting data
should be controlled manually. If customer enables module’s RS485 function, the pin 7 of
module is used to control the direction of communication.
Refer to command AT+UART
should be controlled manually. If customer enables module’s RS485 function, the pin 7 of
module is used to control the direction of communication.
Refer to command AT+UART