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[wifi] Reduce ESP8266 roaming scan dwell time to match ESP32 (#15127)

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This commit is contained in:
J. Nick Koston
2026-03-23 13:58:36 -10:00
committed by Jesse Hills
parent f7b410fd0c
commit d9788aaefc
1 changed files with 14 additions and 3 deletions
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esphome/components/wifi/wifi_component_esp8266.cpp
+14 -3
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@@ -664,11 +664,22 @@ bool WiFiComponent::wifi_scan_start_(bool passive) {
config.show_hidden = 1;
#if USE_ARDUINO_VERSION_CODE >= VERSION_CODE(2, 4, 0)
config.scan_type = passive ? WIFI_SCAN_TYPE_PASSIVE : WIFI_SCAN_TYPE_ACTIVE;
// Use shorter dwell times for roaming scans - we only need to detect strong
// nearby APs, not do a thorough survey. This also reduces off-channel time
// which can cause Beacon Timeout disconnects on some APs.
// Roaming times match the ESP32 IDF scan defaults.
static constexpr uint32_t SCAN_PASSIVE_DEFAULT_MS = 500;
static constexpr uint32_t SCAN_PASSIVE_ROAMING_MS = 300;
static constexpr uint32_t SCAN_ACTIVE_MIN_DEFAULT_MS = 400;
static constexpr uint32_t SCAN_ACTIVE_MAX_DEFAULT_MS = 500;
static constexpr uint32_t SCAN_ACTIVE_MIN_ROAMING_MS = 100;
static constexpr uint32_t SCAN_ACTIVE_MAX_ROAMING_MS = 300;
bool roaming = this->roaming_state_ == RoamingState::SCANNING;
if (passive) {
config.scan_time.passive = 500;
config.scan_time.passive = roaming ? SCAN_PASSIVE_ROAMING_MS : SCAN_PASSIVE_DEFAULT_MS;
} else {
config.scan_time.active.min = 400;
config.scan_time.active.max = 500;
config.scan_time.active.min = roaming ? SCAN_ACTIVE_MIN_ROAMING_MS : SCAN_ACTIVE_MIN_DEFAULT_MS;
config.scan_time.active.max = roaming ? SCAN_ACTIVE_MAX_ROAMING_MS : SCAN_ACTIVE_MAX_DEFAULT_MS;
}
#endif
bool ret = wifi_station_scan(&config, &WiFiComponent::s_wifi_scan_done_callback);