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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TCPTO
Set/Query TCP timeout
MAXSK
Set/Query maxima TCP connection
TCPB
Open/Close TCPB function
TCPPTB
Set/Query TCPB port number
TCPADDB
Set/Query TCPB server address
TCPTOB
Set/Query TCPB time out time
TCPLKB
Query TCPB link status
EPHY
Open/Close ETH interface
STTC
Enable/Disable STA port scan function
DOMAIN
Set/Query domain ofmodule webpage
FRLDEN
Enable/Disable nReload pin function
RELD
Restore to factory default setting
Z
Re-start module
MID
Query module ID information
WRMID
Set module ID
VER
Query module software version information
H
Help
FVEW
Enable/Disable WANN mode
FVER
Set/Query working mode
WMAC
Set/Query AP MAC address
PING
PING command
Notes: HF-A21-SMT module can works as AP or STA, user have to use different AT+ Instruction
to set WiFi parameters when module works as AP or STA mode.
4.2.2.1. AT+E
 Function: Open/Close show back function;
 Format:
AT+E<CR>
+ok<CR>< LF ><CR>< LF >
When HF-A21-SMT module firstly switch from transparent transmission to configuration mode,
show back status is open, input “AT+E” to close show back function, input“AT+E” again to open
show back function.
4.2.2.2. AT+ENTM
 Function: Set module into transparent transmition mode;
 Format:
AT+ENTM<CR>
+ok<CR>< LF ><CR>< LF >
When operate this command, module switch from configuration mode to transparent transmission
mode.
4.2.2.3. AT+NETP
 Function: Set/Query network protocol parameters;
 Format:
 Query Operation