Maximize Wi-Fi performance on ESP32

wifi.cpp

constexpr auto WIFI_CHANNEL = 9; // Find a relatively quiet channel
constexpr auto WIFI_DATA_RATE = WIFI_PHY_RATE_24M;

void initFastWifi() {
  // Set up Wi-Fi with a faster data rate by disabling AMPDU
  // and setting a very fast fixed rate.
  // https://www.esp32.com/viewtopic.php?t=9965
  // We also need delays to work around races between each step:
  // https://esp32.com/viewtopic.php?t=2512
  WiFi.disconnect();
  vTaskDelay(100 / portTICK_RATE_MS);
  WiFi.mode(WIFI_STA);
  vTaskDelay(100 / portTICK_RATE_MS);
  ESP_ERROR_CHECK(esp_wifi_stop());
  vTaskDelay(100 / portTICK_RATE_MS);
  ESP_ERROR_CHECK(esp_wifi_deinit());
  vTaskDelay(100 / portTICK_RATE_MS);
  wifi_init_config_t initConfig = WIFI_INIT_CONFIG_DEFAULT();
  initConfig.ampdu_tx_enable = false;
  ESP_ERROR_CHECK(esp_wifi_init(&initConfig));
  ESP_ERROR_CHECK(esp_wifi_start());
  ESP_ERROR_CHECK(esp_wifi_set_channel(WIFI_CHANNEL, WIFI_SECOND_CHAN_NONE));
  ESP_ERROR_CHECK(esp_wifi_internal_set_fix_rate(WIFI_IF_STA, true, WIFI_DATA_RATE));
  ESP_ERROR_CHECK(esp_now_init());
}