User's Manual

HF-A21-SMT Embedded WiFi Module User Manual
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
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 “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 5 Error Code DescribtionHF-A21-SMT 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
4.2.2. AT+ Instruction Set
Table 6 AT+ Instruction Set List
Instruction Description
<null> NULL
E Open/Close show back function
ENTM Set module 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
WSLK Query WiFi link status as STA
WEBU Set/Query WEB page login parameters
(User Name and Password)
WAP Set/Query WIFI parameters as AP
WAKEY Set/Query WIFI security parameters as AP
HIDESSID Set/Query hide AP‟s SSID
MSLP Set modules into power save mode.(Turn OFF WiFi)
WSCAN Seek AP when module works as STA mode
TCPLK Query if TCP link already build-up
TCPDIS Open/Cose TCP (Only TCP Client available)
WANN Set/Query WAN setting, only effective as STA mode
LANN Set/Query LAN setting, only effective as AP mode
DHCPDEN Enable/Disable LAN DHCP server function
DHCPGW Set/Query DHCP gateway address