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[wifi] Filter fast_connect by band_mode and use background scan for roaming (#15152)

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This commit is contained in:
Jonathan Swoboda
2026-03-24 20:21:04 -04:00
committed by Jesse Hills
parent f5f99071fb
commit 92642df419
3 changed files with 15 additions and 0 deletions
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esphome/components/wifi/wifi_component.cpp
+8
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@@ -2229,6 +2229,14 @@ bool WiFiComponent::load_fast_connect_settings_(WiFiAP &params) {
params.set_hidden(false);
ESP_LOGD(TAG, "Loaded fast_connect settings");
#if defined(USE_ESP32) && defined(SOC_WIFI_SUPPORT_5G)
if ((this->band_mode_ == WIFI_BAND_MODE_5G_ONLY && fast_connect_save.channel < FIRST_5GHZ_CHANNEL) ||
(this->band_mode_ == WIFI_BAND_MODE_2G_ONLY && fast_connect_save.channel >= FIRST_5GHZ_CHANNEL)) {
ESP_LOGW(TAG, "Saved channel %u not allowed by band mode, ignoring fast_connect", fast_connect_save.channel);
this->selected_sta_index_ = -1;
return false;
}
#endif
return true;
}
esphome/components/wifi/wifi_component.h
+2
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@@ -774,6 +774,8 @@ class WiFiComponent : public Component {
SemaphoreHandle_t high_performance_semaphore_{nullptr};
#endif
static constexpr uint8_t FIRST_5GHZ_CHANNEL = 36;
// Post-connect roaming constants
static constexpr uint32_t ROAMING_CHECK_INTERVAL = 5 * 60 * 1000; // 5 minutes
static constexpr int8_t ROAMING_MIN_IMPROVEMENT = 10; // dB
esphome/components/wifi/wifi_component_esp_idf.cpp
+5
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@@ -961,6 +961,11 @@ bool WiFiComponent::wifi_scan_start_(bool passive) {
config.scan_time.active.min = 100;
config.scan_time.active.max = 300;
}
// When scanning while connected (roaming), return to home channel between
// each scanned channel to maintain the connection (helps with BLE/WiFi coexistence)
if (this->roaming_state_ == RoamingState::SCANNING) {
config.coex_background_scan = true;
}
esp_err_t err = esp_wifi_scan_start(&config, false);
if (err != ESP_OK) {