User's Manual

DTU-H100 Wi-Fi/Ethernet to RS485/RS232 Server User Manual
http://www.iotworkshop.com - 44 -
 “NULL": Query the current command parameters setting;
 [para-n]: Parameters input for setting if required;
 <CR>："Enter" Key, it‟s 0x0a or 0x0d in ASCII;
Notes: When input AT+Instruction, “AT+<CMD>" character will display capital letter automatic and
other parts will not change as you input.
 Response Message
+<RSP>[op] [para-1,para-2,para-3,para-4…]<CR><LF><CR><LF>
 +: Prefix of response message;
 RSP: Response string;
 “ok" : Success
 “ERR": Failure
 [op] : =
 [para-n]: Parameters if query command or Error code when error happened;
 <CR>: ASCII 0x0d;
 <LF>: ASCIII 0x0a;
 Error Code
Table 6 Error Code DescribtionThe device Web Access Default Setting
Error Code
Description
-1
Invalid Command Format
-2
Invalid Command
-3
Invalid Operation Symbol
-4
Invalid Parameter
-5
Operation Not Permitted
5.2.2. AT+ Instruction Set
Table 7 AT+ Instruction Set List
Instruction
Description
<null>
NULL
E
Open/Close show back function
ENTM
Set device into transparent transmition mode
NETP
Set/Query network protocol parameters
UART
Set/Query serial port parameters
UARTF
Open/Close UART auto-frame function
UARTFT
Set/Query UART auto-frame trigger time
UARTFL
Set/Query UART auto-frame trigger length
TMODE
Set/Query data transmition mode
(transparent transmition)
WMODE
Set/Query WIFI work mode (AP or STA)
WSKEY
Set/Query WIFI security parameters as STA
WSSSID
Set/Query WIFI target AP SSID parameters as STA