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Code Issues Releases Wiki Activity

Merge branch 'wifi_sort' into integration

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This commit is contained in:
J. Nick Koston
2025-08-02 12:46:51 -10:00
parent 711eb2d7eb 9c76847aca
commit 56eedad727
2 changed files with 51 additions and 25 deletions
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2
esphome/components/syslog/esphome_syslog.cpp
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@@ -35,7 +35,7 @@ void Syslog::log_(const int level, const char *tag, const char *message, size_t
severity = LOG_LEVEL_TO_SYSLOG_SEVERITY[level];
}
int pri = this->facility_ * 8 + severity;
auto timestamp = this->time_->now().strftime("%b %d %H:%M:%S");
auto timestamp = this->time_->now().strftime("%b %e %H:%M:%S");
size_t len = message_len;
// remove color formatting
if (this->strip_ && message[0] == 0x1B && len > 11) {

74
esphome/components/wifi/wifi_component.cpp
View File

@@ -505,6 +505,54 @@ void WiFiComponent::start_scanning() {
this->state_ = WIFI_COMPONENT_STATE_STA_SCANNING;
}
// Helper function for WiFi scan result comparison
// Returns true if 'a' should be placed before 'b' in the sorted order
static bool wifi_scan_result_is_better(const WiFiScanResult &a, const WiFiScanResult &b) {
// Matching networks always come before non-matching
if (a.get_matches() && !b.get_matches())
return true;
if (!a.get_matches() && b.get_matches())
return false;
if (a.get_matches() && b.get_matches()) {
// For APs with the same SSID, always prefer stronger signal
// This helps with mesh networks and multiple APs
if (a.get_ssid() == b.get_ssid()) {
return a.get_rssi() > b.get_rssi();
}
// For different SSIDs, check priority first
if (a.get_priority() != b.get_priority())
return a.get_priority() > b.get_priority();
// If priorities are equal, prefer stronger signal
return a.get_rssi() > b.get_rssi();
}
// Both don't match - sort by signal strength
return a.get_rssi() > b.get_rssi();
}
// Helper function for insertion sort of WiFi scan results
// Using insertion sort instead of std::stable_sort saves flash memory
// by avoiding template instantiations (std::rotate, std::stable_sort, lambdas)
// IMPORTANT: This sort is stable (preserves relative order of equal elements)
static void insertion_sort_scan_results(std::vector<WiFiScanResult> &results) {
const size_t size = results.size();
for (size_t i = 1; i < size; i++) {
// Make a copy to avoid issues with move semantics during comparison
WiFiScanResult key = results[i];
int32_t j = i - 1;
// Move elements that are worse than key to the right
// For stability, we only move if key is strictly better than results[j]
while (j >= 0 && wifi_scan_result_is_better(key, results[j])) {
results[j + 1] = results[j];
j--;
}
results[j + 1] = key;
}
}
void WiFiComponent::check_scanning_finished() {
if (!this->scan_done_) {
if (millis() - this->action_started_ > 30000) {
@@ -535,30 +583,8 @@ void WiFiComponent::check_scanning_finished() {
}
}
std::stable_sort(this->scan_result_.begin(), this->scan_result_.end(),
[](const WiFiScanResult &a, const WiFiScanResult &b) {
// return true if a is better than b
if (a.get_matches() && !b.get_matches())
return true;
if (!a.get_matches() && b.get_matches())
return false;
if (a.get_matches() && b.get_matches()) {
// For APs with the same SSID, always prefer stronger signal
// This helps with mesh networks and multiple APs
if (a.get_ssid() == b.get_ssid()) {
return a.get_rssi() > b.get_rssi();
}
// For different SSIDs, check priority first
if (a.get_priority() != b.get_priority())
return a.get_priority() > b.get_priority();
// If priorities are equal, prefer stronger signal
return a.get_rssi() > b.get_rssi();
}
return a.get_rssi() > b.get_rssi();
});
// Sort scan results using insertion sort for better memory efficiency
insertion_sort_scan_results(this->scan_result_);
for (auto &res : this->scan_result_) {
char bssid_s[18];