USR-DR404 user manual
Jinan USR IOT Technology Limited
57
<CR>:ASCII code: 0x0d
；
<LF>: ASCII code :0x0a
；
Error code
Error
State
-1
Invalid command format
-2
Invalid command
-3
Invalid Operator
-4
Invalid Parameters
-5
Operation not allowed
4.3.4 AT command
Command
Function
E
Enable/Disable echo function(DR404 does not support)
ENTM
Enter transparent transmission mode
NETP
Query/Set Network protocol parameters
UART
Query/Set serial port parameters
UARTF
Enable/Disable auto-frame function
UARTFT
Query/Set auto-frame trigger time
UARTFL
Query/Set auto-frame trigger length
TMODE
Query/Set data transmission mode (transparent transmission
mode or protocol mode)
WMODE
Query/Set WIFI mode
（
AP or STA
）
WSKEY
Query/Set encryption parameters in STA mode
WSSSID
Query/Set SSID of connected AP in STA mode
WSLK
Query the connection status in STA mode
WEBU
Query/Set Web Server username and password
WAP
Query/Set AP mode parameters
WAKEY
Query/Set encryption parameters in AP mode
MSLP
Set the module to enter low power mode, turn off WIFI
WSCAN
Search surrounding AP in STA mode
TCPLK
Query socket A TCP connection connect/disconnected
TCPDIS
Query/Set establish TCP connection enable/disable(Only take
effect in TCP Client mode)
WANN
Query/Set network parameters in STA mode(WAN interface
parameters)
LANN
Query/Set network parameters in AP mode(LAN interface
parameters)
