USR-DR404 user manual
Jinan USR IOT Technology Limited
24
Diagram 19 Data transfer mode
3.1.5. AT command mode
Under AT command, send AT command to query the current status and parameters of the W610.
For details on the method and timing for entering and exiting the AT command mode, refer to the relevant section of
“4.3. Command Configuration” in this manual.
3.2. Socket
Socket A includes TCP Server, TCP Client, UDP Server, UDP Client and socket B supports TCP Client and UDP client.
When socket A in TCP server , at most supports 24 TCP client to connect. In multi-TCP link connection mode, data
transmitted from TCP will be forwarded to the serial port one by one. The data coming from the serial port will be copied
into multiple copies, and one copy will be forwarded on each TCP link. The specific data flow chart shows:
Diagram 20 Multi TCP link data transmission diagram
Socket A settings: AT+NETP/AT+TCPTO/AT+TCPLK/AT+TCPDIS
Serial device
USR-DR404