Espressif Systems ESP - Page 12

4.10.12 [Connect] How do ESP8266 and ESP32 hide SSID in SoftAP mode? . . . . . . . . . . . 128
4.10.13 Does the bu󰝗er parameter in esp_wi󰝘_802.11_tx interface include FCS? . . . . . . . . . 128
4.10.14 What is the supported Wi-Fi frequency band and power meter for ESP-WROOM-32D? . 128
4.10.15 What is the maximum value of ESP32 Wi-Fi RF power？ . . . . . . . . . . . . . . . . . 128
4.10.16 How does ESP32 adjust Wi-Fi TX power? . . . . . . . . . . . . . . . . . . . . . . . . . 129
4.10.17 [Connect] How many devices is ESP32 able to connect in AP mode? . . . . . . . . . . . 129
4.10.18 [Connect] How do Wi-Fi modules rank signal strength levels based on RSSI values？ . . . 129
4.10.19 [Connect] Why does ESP32 disconnect from STA when it is in Soft-AP mode? . . . . . . 129
4.10.20 [Connect] While ESP32 connecting Wi-Fi, how can I determine the reason of failure by
error codes? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
4.10.21 Does ESP32 perform domain name resolution each time it connects to the server? . . . . 130
4.10.22 [Connect] What does the number after the state machine switch in Wi-Fi log mean? . . . 130
4.10.23 [Connect] What does bcn_timeout, ap_probe_send_start mean？ . . . . . . . . . . . . . 131
4.10.24 [Connect] How to reconnect Wi-Fi after it disconnected? . . . . . . . . . . . . . . . . . 131
4.10.25 [Connect] When does ESP32 disconnect from SoftAP in station mode？ . . . . . . . . . 131
4.10.26 [Scan] Why does the STA cannot 󰝘nd any AP sometimes during the scanning? . . . . . . 131
4.10.27 [Scan] What is the maximum number of APs that can be scanned？ . . . . . . . . . . . . 132
4.10.28 [Scan] Can I choose to connect the best AP when there are multiple APs with identical
ssid/password during the scan？ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
4.10.29 [Scan] How to con󰝘gure scan_method in the wi󰝘_sta_con󰝘g_t structure? What is the dif-
ference between all_channel_scan and fast_scan? . . . . . . . . . . . . . . . . . . . . . . 132
4.10.30 [LWIP] How to get error code of the socket? . . . . . . . . . . . . . . . . . . . . . . . . 132
4.10.31 [LWIP] What is the default keep-alive time of TCP? . . . . . . . . . . . . . . . . . . . . 132
4.10.32 [LWIP] What is the retransmission interval of TCP？ . . . . . . . . . . . . . . . . . . . 133
4.10.33 [LWIP] What is the maximum number of sockets that can be created? . . . . . . . . . . . 133
4.10.34 [Sleep] What kinds of sleeping mode does ESP32 have? What are the di󰝗erences? . . . . 133
4.10.35 [Sleep] How can I enable the dynamic frequency scaling function for ESP32 in Modem-
sleep mode? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
4.10.36 [Sleep] How low can the speedstep function go for ESP32 in modem sleep mode？ . . . . 133
4.10.37 [Sleep] What a󰝗ects the average current of ESP32 in modem sleep mode? . . . . . . . . . 134
4.10.38 [Sleep] Why the average current measured in modem sleep mode is a bit high? . . . . . . 134
4.10.39 [Sleep] Why the average current measured in light sleep mode is a bit high? . . . . . . . . 134
4.10.40 [Sleep] What kinds of power-saving modes does ESP32 have? What are the di󰝗erences? . 134
4.10.41 Does ESP8266 support 802.11k/v/r protocol? . . . . . . . . . . . . . . . . . . . . . . . 135
4.10.42 Does ESP32 Wi-Fi support roaming between di󰝗erent APs with the same SSID? . . . . . 135
4.10.43 [Connect] After the NONOS_SDK updated from version 2.1.0 to 2.2.2, why does the
connecting time become longer？ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
4.10.44 How does ESP32 receive and transmit Wi-Fi 802.11 packets? . . . . . . . . . . . . . . . 135
4.10.45 [Connect] The ESP32 and ESP8266 failed to connect to router, what could be the reasons？135
4.10.46 [Connect] What kind of networking methods does ESP8266 have？ . . . . . . . . . . . . 135
4.10.47 [Connect] What are the speci󰝘cations of Wi-Fi parameters when using SmartCon󰝘g? . . . 136
4.10.48 [Connect] Does ESP8266 Wi-Fi support WPA2 enterprise-level encryption？ . . . . . . . 136
4.10.49 [Connect] What are the low-power modes for ESP32 to maintain its connection to Wi-Fi? 136
4.10.50 Do Espressif’s chips support WPA3? . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
4.10.51 [Connect] How does the device choose AP when there are multiple identical SSIDs in the
current environment? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
4.10.52 [Connect] Does ESP8266 have repeater solutions? . . . . . . . . . . . . . . . . . . . . . 136
4.10.53 What is the retransmission time for ESP32’s data frame and management frame？Can
this be con󰝘gured？ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
4.10.54 How to customize the hostname for ESP32？ . . . . . . . . . . . . . . . . . . . . . . . . 137
4.10.55 How to obtain 802.11 Wi-Fi packets？ . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
4.10.56 Does ESP32 Wi-Fi support PMF (Protected Management Frames) and PFS (Perfect For-
ward Secrecy)？ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
4.10.57 Why does ESP8266 print out an AES PN error log when using esptouch v2? . . . . . . . 137
4.10.58 Does ESP32 WFA certi󰝘cation support multicast? . . . . . . . . . . . . . . . . . . . . . 137
4.10.59 When using ESP32 to establish a hotspot, can I scan all APs and the occupied channels
󰝘rst, and then select the smallest and cleanest channel to establish my own AP? . . . . . . 137
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