Configuring WiFi Channel Bandwidth in Arduino

[noamaiz]

I know that with esp-idf you can change the bandwidth (20 or 40MHz) in the config. Is there any way to currently do this in Arduino IDE? I want to be able to set bandwidth to 40MHz for FTM.

[Sprite]

The Arduino IDE is built on top of ESP-IDF; as long as what you want isn't decided compile-time, you should be able to use the ESP-IDF functions after including the proper headers.

[fanatmeta]

Hi, I have the same problem: there is no way to specify a 40MHz BW in FTM initiation. Because FTM works in unassociated state, the esp_wifi_set_bandwidth API does not work.

[ESP32_kid]

#include <esp_wifi.h>

The default for ESP32's appears to be wideband on wifi.

Set HT20 after softAP setting

WiFi.softAP(ssid, password, channel);
esp_wifi_set_bandwidth(WIFI_IF_AP, WIFI_BW_HT20);
esp_wifi_set_max_tx_power(8);


Btw, be careful running ESP32's at full 20dbm power, most boards have crappy antenna with bad VSWR, the reflected power can hurt the LNA or cause other problems with the wifi.