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docs: fix the bug in wifi doc

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zhangyanjiao
2019-07-29 14:55:17 +08:00
parent 434dd2d7a1
commit 62bb107b31
2 changed files with 3 additions and 3 deletions
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docs/en/api-guides/wifi.rst
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@@ -1407,7 +1407,7 @@ In maximum power save mode, station wakes up every listen interval to receive be
Call ``esp_wifi_set_ps(WIFI_PS_MIN_MODEM)`` to enable Modem-sleep minimum power save mode or ``esp_wifi_set_ps(WIFI_PS_MAX_MODEM)`` to enable Modem-sleep maximum power save mode after calling :cpp:func:`esp_wifi_init`. When station connects to AP, Modem-sleep will start. When station disconnects from AP, Modem-sleep will stop.
Call `esp_wifi_set_ps(WIFI_PS_MIN_MODEM)` to disable modem sleep entirely. This has much higher power consumption, but provides minimum latency for receiving Wi-Fi data in real time. When modem sleep is enabled, received Wi-Fi data can be delayed for as long as the DTIM period (minimum power save mode) or the listen interval (maximum power save mode).
Call ``esp_wifi_set_ps(WIFI_PS_NONE)`` to disable modem sleep entirely. This has much higher power consumption, but provides minimum latency for receiving Wi-Fi data in real time. When modem sleep is enabled, received Wi-Fi data can be delayed for as long as the DTIM period (minimum power save mode) or the listen interval (maximum power save mode).
The default Modem-sleep mode is WIFI_PS_MIN_MODEM.
@@ -1697,7 +1697,7 @@ ESP32 supports Wi-Fi bandwidth HT20 or HT40, it doesn't support HT20/40 coexist.
In station mode, the actual bandwidth is firstly negotiated during the Wi-Fi connection. It is HT40 only if both the station and the connected AP support HT40, otherwise it's HT20. If the bandwidth of connected AP is changes, the actual bandwidth is negotiated again without Wi-Fi disconnecting.
Similarly, in AP mode, the actual bandwidth is negotiated between AP and the stations that connect to the AP. It's HT40 only if the AP and all the stations support HT40, otherwise it's HT40.
Similarly, in AP mode, the actual bandwidth is negotiated between AP and the stations that connect to the AP. It's HT40 if the AP and one of the stations support HT40, otherwise it's HT20.
In station/AP coexist mode, the station/AP can configure HT20/40 seperately. If both station and AP are negotiated to HT40, the HT40 channel should be the channel of station because the station always has higher priority than AP in ESP32. E.g. the configured bandwidth of AP is HT40, the configured primary channel is 6 and the configured secondary channel is 10. The station is connected to an router whose primary channel is 6 and secondary channel is 2, then the actual channel of AP is changed to primary 6 and secondary 2 automatically.