USR-DR404 user manual
Jinan USR IOT Technology Limited
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AT+ WSCAN<CR>
+ok=<ap_site><CR>< LF ><CR>< LF >
Parameters:
ap_site: Searched APs
The first line returned is "RSSI, SSID, BSSID, Channel, Encryption, Authentication", which are the signal strength,
network name, MAC address, channel, authentication mode, and encryption algorithm.
4.3.4.18. AT+TCPLK
Function: Query whether TCP connection is established
Format:
AT+ TCPLK<CR>
+ok=<sta><CR>< LF ><CR>< LF >
Parameters:
sta.: Returns whether TCP connection is established, for example:
on, TCP connection is established
off, TCP connection is not established
4.3.4.19. AT+TCPDIS
Function: Connect / Disconnect TCP (only valid when TCP Client)
Format:
Query : AT+ TCPDIS <CR>
+ok=<sta.><CR>< LF ><CR>< LF >
Setting: AT+ TCPDIS=<on/off><CR>
+ok<CR>< LF ><CR>< LF >
Parameters:
When querying, sta.: Returns whether the TCP Client is linkable, for example
on, connectable
off, not connectable
When setting, "off" sets the module as unlinkable.Immediately after the command is completed, the module
disconnects the link and does not reconnect."On" sets the module to a linkable state. After the command is completed,
the module will immediately reconnect to the server.
