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Optimize WiFi connection time by using WIFI_FAST_SCAN #25

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Merged
lorow merged 2 commits into from
Dec 31, 2025
Merged

Optimize WiFi connection time by using WIFI_FAST_SCAN #25

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a35f474
Optimize WiFi connection time by using WIFI_FAST_SCAN (~2000ms improv…
m-RNA Dec 21, 2025
1131bd2
Check whether WIFI is open before closing
m-RNA Dec 21, 2025
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18 changes: 12 additions & 6 deletions components/wifiManager/wifiManager/wifiManager.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -78,10 +78,10 @@ void WiFiManager::SetCredentials(const char *ssid, const char *password)
_wifi_cfg.sta.pmf_cfg.capable = false;
_wifi_cfg.sta.pmf_cfg.required = false;

// IMPORTANT: Set scan method to ALL channels
_wifi_cfg.sta.scan_method = WIFI_ALL_CHANNEL_SCAN;
// OPTIMIZATION: Use fast scan instead of all channel scan for quicker connection
_wifi_cfg.sta.scan_method = WIFI_FAST_SCAN;
_wifi_cfg.sta.bssid_set = 0; // Don't use specific BSSID
_wifi_cfg.sta.channel = 0; // Scan all channels
_wifi_cfg.sta.channel = 0; // Auto channel detection

// Additional settings that might help with compatibility
_wifi_cfg.sta.listen_interval = 0; // Default listen interval
Expand All @@ -102,7 +102,12 @@ void WiFiManager::ConnectWithHardcodedCredentials()
{
SystemEvent event = {EventSource::WIFI, WiFiState_e::WiFiState_ReadyToConnect};
this->SetCredentials(CONFIG_WIFI_SSID, CONFIG_WIFI_PASSWORD);
esp_wifi_stop();

wifi_mode_t mode;
if (esp_wifi_get_mode(&mode) == ESP_OK) {
esp_wifi_stop();
}

ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &_wifi_cfg));

Expand All @@ -112,11 +117,12 @@ void WiFiManager::ConnectWithHardcodedCredentials()
event.value = WiFiState_e::WiFiState_Connecting;
xQueueSend(this->eventQueue, &event, 10);

// Use shorter timeout for faster startup - 8 seconds should be enough for most networks
EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
pdMS_TO_TICKS(8000));

/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
* happened. */
Expand Down Expand Up @@ -192,7 +198,7 @@ void WiFiManager::ConnectWithStoredCredentials()
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
pdMS_TO_TICKS(30000)); // 30 second timeout instead of portMAX_DELAY
pdMS_TO_TICKS(10000)); // 10 second timeout for faster failover
if (bits & WIFI_CONNECTED_BIT)
{
ESP_LOGI(WIFI_MANAGER_TAG, "connected to ap SSID:%s",
Expand Down