Chapter 4. Software framework
4.10.53 What is the retransmission time for ESP32’s data frame and management
frame？Can this be congured？
The retransmission time is 31 and it can not be congured.
4.10.54 How to customize the hostname for ESP32？
• Taking ESP-IDF V4.2 as an example, you can go to menucong > Component Cong > LWIP > Local netif
hostname, and type in the customized hostname.
• There may be a slight dierence on naming in dierent versions.
4.10.55 How to obtain 802.11 Wi-Fi packets？
• Please refer to Wireshark User Guide in ESP-IDF Programming Guide.
• Please note that the wireless network interface controller (WNIC) that you use should support the Monitor
mode.
4.10.56 Does ESP32 Wi-Fi support PMF (Protected Management Frames) and PFS (Per-
fect Forward Secrecy)？
The PMF is supported both in WPA2 and WPA3, and PFS is supported in WPA3.
4.10.57 Why does ESP8266 print out an AES PN error log when using esptouch v2?
• This occurs when ESP8266 has received retransmitted packets from the router for multiple times. However,
this will not aect your usage.
4.10.58 Does ESP32 WFA certication support multicast?
• No. It is recommended to refer to the ASD-1148 method of testing.
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?
• You can scan all APs and occupied channels before establishing a hotspot. Refer to the API
esp_wi_scan_get_ap_records.
• It cannot be performed automatically. You need to customize the channel selection algorithm to implement
such operation.
Espressif Systems 137
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