esp_wifi v3.3 changes see https://github.com/espressif/esp-idf/issues/4311

https://github.com/espressif/esp-idf/issues/4005

src/wifiscan.cpp

@@ -74,6 +74,7 @@ void wifi_sniffer_init(void) {
   ESP_ERROR_CHECK(esp_wifi_set_ps(WIFI_PS_NONE)); // no modem power saving
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous_filter(&filter)); // set frame filter
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous_rx_cb(&wifi_sniffer_packet_handler));
+  ESP_ERROR_CHECK(esp_wifi_start()); //for esp_wifi v3.3
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous(true)); // now switch on monitor mode
 
   // setup wifi channel rotation timer