Shanghai High-Flying Electronics HF-SH01, Руководство пользователя

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High-Flying
Low Power WiFi Module User Manual
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
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2.4. Encryption
Encryption is a method of scrambling a message that makes it unreadable to unwanted parties,
adding a degree of secure communications. There are different protocols for providing encryption, and
the HF-LPB100 module supports following:
 WEP
 WPA-PSK/TKIP
 WPA-PSK/AES
 WPA2-PSK/TKIP
 WPA2-PSK/AES
2.5. Power Save Scheme
HF-LPB100 module can work at two modes based on different power save scheme:
 Normal (Active/Sleep) Mode - AP Associated, WiFi ON/OFF based on internal control
 Standby Mode - Non AP Associated, WiFi Shut dwon
Normal (Active/Sleep) Mode Normal mode is no DTIM related (Default mode), module will monitor
the interval to Active/Sleep.
Standby Mode allows the WiFi circuitry to be powered down, which results in the lowest sleep current,
but at the expense of longer wake up times. This is due to the module associating with the access
point every time when it wakes up. The intent of this option is to allow for longer sleep times. Standby
mode can through AT+MSLP command or trigger “Sleep_RQ” pin to go in.
The standby mode status and wakeup method as follows: For standby mode, module provides two
wakes up options, user can select one or whole as the module wake up option. Refer to AT Instruction
(Power Management Instruction Set) for more detailed setting.
 “Sleep_RQ” Pin Wake Up
 “Reset” Pin Wake Up
Table 6 Standby Mode Status and Wake Up
Status Wake Up Method
Wi-Fi MCU Current UART GPIO Timeout AT Commond Reset Pin
Standby OFF OFF <80uA OFF Yes No No Yes
Sleep _RQ Pin Wake Up Option allows an external microcontroller to determine when HF-LPB100
should sleep and when it should wake by controlling the “Sleep_RQ” and “Sleep_ON” pin. at the
standby mode, user can de-assert this pin low “0”, after 1’s assert to high ”1” to put the module to
wake up the module. If user doesn't use pin sleep function, can leave this pin open.
Sleep _RQ Pin Wake Up Option allows an external microcontroller to de-assert “Reset” pin to low
“0” to reset the module.
HF-SH01