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esphome/esphome/components/wifi/wifi_component_libretiny.cpp

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#include "wifi_component.h"
#ifdef USE_WIFI
#ifdef USE_LIBRETINY
#include <cinttypes>
#include <utility>
#include <algorithm>
#include "lwip/ip_addr.h"
#include "lwip/err.h"
#include "lwip/dns.h"
#include <FreeRTOS.h>
#include <queue.h>
#include "esphome/core/application.h"
#include "esphome/core/hal.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
#include "esphome/core/util.h"
namespace esphome::wifi {
static const char *const TAG = "wifi_lt";
// Thread-safe event handling for LibreTiny WiFi
//
// LibreTiny's WiFi.onEvent() callback runs in the WiFi driver's thread context,
// not the main ESPHome loop. Without synchronization, modifying shared state
// (like connection status flags) from the callback causes race conditions:
// - The main loop may never see state changes (values cached in registers)
// - State changes may be visible in inconsistent order
// - LibreTiny targets (BK7231, RTL8720) lack atomic instructions (no LDREX/STREX)
//
// Solution: Queue events in the callback and process them in the main loop.
// This is the same approach used by ESP32 IDF's wifi_process_event_().
// All state modifications happen in the main loop context, eliminating races.
static constexpr size_t EVENT_QUEUE_SIZE = 16; // Max pending WiFi events before overflow
static QueueHandle_t s_event_queue = nullptr; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
static volatile uint32_t s_event_queue_overflow_count =
0; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
// Event structure for queued WiFi events - contains a copy of event data
// to avoid lifetime issues with the original event data from the callback
struct LTWiFiEvent {
arduino_event_id_t event_id;
union {
struct {
uint8_t ssid[33];
uint8_t ssid_len;
uint8_t bssid[6];
uint8_t channel;
uint8_t authmode;
} sta_connected;
struct {
uint8_t ssid[33];
uint8_t ssid_len;
uint8_t bssid[6];
uint8_t reason;
} sta_disconnected;
struct {
uint8_t old_mode;
uint8_t new_mode;
} sta_authmode_change;
struct {
uint32_t status;
uint8_t number;
uint8_t scan_id;
} scan_done;
struct {
uint8_t mac[6];
int rssi;
} ap_probe_req;
} data;
};
// Connection state machine - only modified from main loop after queue processing
enum class LTWiFiSTAState : uint8_t {
IDLE, // Not connecting
CONNECTING, // Connection in progress
CONNECTED, // Successfully connected with IP
ERROR_NOT_FOUND, // AP not found (probe failed)
ERROR_FAILED, // Connection failed (auth, timeout, etc.)
};
static LTWiFiSTAState s_sta_state = LTWiFiSTAState::IDLE; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
// Count of ignored disconnect events during connection - too many indicates real failure
static uint8_t s_ignored_disconnect_count = 0; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
// Threshold for ignored disconnect events before treating as connection failure
// LibreTiny sends spurious "Association Leave" events, but more than this many
// indicates the connection is failing repeatedly. Value of 3 balances fast failure
// detection with tolerance for occasional spurious events on successful connections.
static constexpr uint8_t IGNORED_DISCONNECT_THRESHOLD = 3;
bool WiFiComponent::wifi_mode_(optional<bool> sta, optional<bool> ap) {
uint8_t current_mode = WiFi.getMode();
bool current_sta = current_mode & 0b01;
bool current_ap = current_mode & 0b10;
bool enable_sta = sta.value_or(current_sta);
bool enable_ap = ap.value_or(current_ap);
if (current_sta == enable_sta && current_ap == enable_ap)
return true;
if (enable_sta && !current_sta) {
ESP_LOGV(TAG, "Enabling STA");
} else if (!enable_sta && current_sta) {
ESP_LOGV(TAG, "Disabling STA");
}
if (enable_ap && !current_ap) {
ESP_LOGV(TAG, "Enabling AP");
} else if (!enable_ap && current_ap) {
ESP_LOGV(TAG, "Disabling AP");
}
uint8_t mode = 0;
if (enable_sta)
mode |= 0b01;
if (enable_ap)
mode |= 0b10;
bool ret = WiFi.mode(static_cast<wifi_mode_t>(mode));
if (!ret) {
ESP_LOGW(TAG, "Setting mode failed");
return false;
}
this->ap_started_ = enable_ap;
return ret;
}
bool WiFiComponent::wifi_apply_output_power_(float output_power) {
int8_t val = static_cast<int8_t>(output_power * 4);
return WiFi.setTxPower(val);
}
bool WiFiComponent::wifi_sta_pre_setup_() {
if (!this->wifi_mode_(true, {}))
return false;
WiFi.setAutoReconnect(false);
delay(10);
return true;
}
bool WiFiComponent::wifi_apply_power_save_() {
bool success = WiFi.setSleep(this->power_save_ != WIFI_POWER_SAVE_NONE);
#ifdef USE_WIFI_POWER_SAVE_LISTENERS
if (success) {
for (auto *listener : this->power_save_listeners_) {
listener->on_wifi_power_save(this->power_save_);
}
}
#endif
return success;
}
bool WiFiComponent::wifi_sta_ip_config_(const optional<ManualIP> &manual_ip) {
// enable STA
if (!this->wifi_mode_(true, {}))
return false;
if (!manual_ip.has_value()) {
return true;
}
WiFi.config(manual_ip->static_ip, manual_ip->gateway, manual_ip->subnet, manual_ip->dns1, manual_ip->dns2);
return true;
}
network::IPAddresses WiFiComponent::wifi_sta_ip_addresses() {
if (!this->has_sta())
return {};
network::IPAddresses addresses;
addresses[0] = WiFi.localIP();
#if USE_NETWORK_IPV6
int i = 1;
auto v6_addresses = WiFi.allLocalIPv6();
for (auto address : v6_addresses) {
addresses[i++] = network::IPAddress(address.toString().c_str());
}
#endif /* USE_NETWORK_IPV6 */
return addresses;
}
bool WiFiComponent::wifi_apply_hostname_() {
// setting is done in SYSTEM_EVENT_STA_START callback too
WiFi.setHostname(App.get_name().c_str());
return true;
}
bool WiFiComponent::wifi_sta_connect_(const WiFiAP &ap) {
// enable STA
if (!this->wifi_mode_(true, {}))
return false;
String ssid = WiFi.SSID();
if (ssid && strcmp(ssid.c_str(), ap.get_ssid().c_str()) != 0) {
WiFi.disconnect();
}
#ifdef USE_WIFI_MANUAL_IP
if (!this->wifi_sta_ip_config_(ap.get_manual_ip())) {
return false;
}
#else
if (!this->wifi_sta_ip_config_({})) {
return false;
}
#endif
this->wifi_apply_hostname_();
// Reset state machine and disconnect counter before connecting
s_sta_state = LTWiFiSTAState::CONNECTING;
s_ignored_disconnect_count = 0;
WiFiStatus status = WiFi.begin(ap.get_ssid().c_str(), ap.get_password().empty() ? NULL : ap.get_password().c_str(),
ap.get_channel(), // 0 = auto
ap.has_bssid() ? ap.get_bssid().data() : NULL);
if (status != WL_CONNECTED) {
ESP_LOGW(TAG, "esp_wifi_connect failed: %d", status);
return false;
}
return true;
}
const char *get_auth_mode_str(uint8_t mode) {
switch (mode) {
case WIFI_AUTH_OPEN:
return "OPEN";
case WIFI_AUTH_WEP:
return "WEP";
case WIFI_AUTH_WPA_PSK:
return "WPA PSK";
case WIFI_AUTH_WPA2_PSK:
return "WPA2 PSK";
case WIFI_AUTH_WPA_WPA2_PSK:
return "WPA/WPA2 PSK";
default:
return "UNKNOWN";
}
}
const char *get_op_mode_str(uint8_t mode) {
switch (mode) {
case WIFI_OFF:
return "OFF";
case WIFI_STA:
return "STA";
case WIFI_AP:
return "AP";
case WIFI_AP_STA:
return "AP+STA";
default:
return "UNKNOWN";
}
}
const char *get_disconnect_reason_str(uint8_t reason) {
switch (reason) {
case WIFI_REASON_AUTH_EXPIRE:
return "Auth Expired";
case WIFI_REASON_AUTH_LEAVE:
return "Auth Leave";
case WIFI_REASON_ASSOC_EXPIRE:
return "Association Expired";
case WIFI_REASON_ASSOC_TOOMANY:
return "Too Many Associations";
case WIFI_REASON_NOT_AUTHED:
return "Not Authenticated";
case WIFI_REASON_NOT_ASSOCED:
return "Not Associated";
case WIFI_REASON_ASSOC_LEAVE:
return "Association Leave";
case WIFI_REASON_ASSOC_NOT_AUTHED:
return "Association not Authenticated";
case WIFI_REASON_DISASSOC_PWRCAP_BAD:
return "Disassociate Power Cap Bad";
case WIFI_REASON_DISASSOC_SUPCHAN_BAD:
return "Disassociate Supported Channel Bad";
case WIFI_REASON_IE_INVALID:
return "IE Invalid";
case WIFI_REASON_MIC_FAILURE:
return "Mic Failure";
case WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT:
return "4-Way Handshake Timeout";
case WIFI_REASON_GROUP_KEY_UPDATE_TIMEOUT:
return "Group Key Update Timeout";
case WIFI_REASON_IE_IN_4WAY_DIFFERS:
return "IE In 4-Way Handshake Differs";
case WIFI_REASON_GROUP_CIPHER_INVALID:
return "Group Cipher Invalid";
case WIFI_REASON_PAIRWISE_CIPHER_INVALID:
return "Pairwise Cipher Invalid";
case WIFI_REASON_AKMP_INVALID:
return "AKMP Invalid";
case WIFI_REASON_UNSUPP_RSN_IE_VERSION:
return "Unsupported RSN IE version";
case WIFI_REASON_INVALID_RSN_IE_CAP:
return "Invalid RSN IE Cap";
case WIFI_REASON_802_1X_AUTH_FAILED:
return "802.1x Authentication Failed";
case WIFI_REASON_CIPHER_SUITE_REJECTED:
return "Cipher Suite Rejected";
case WIFI_REASON_BEACON_TIMEOUT:
return "Beacon Timeout";
case WIFI_REASON_NO_AP_FOUND:
return "AP Not Found";
case WIFI_REASON_AUTH_FAIL:
return "Authentication Failed";
case WIFI_REASON_ASSOC_FAIL:
return "Association Failed";
case WIFI_REASON_HANDSHAKE_TIMEOUT:
return "Handshake Failed";
case WIFI_REASON_CONNECTION_FAIL:
return "Connection Failed";
case WIFI_REASON_UNSPECIFIED:
default:
return "Unspecified";
}
}
#define ESPHOME_EVENT_ID_WIFI_READY ARDUINO_EVENT_WIFI_READY
#define ESPHOME_EVENT_ID_WIFI_SCAN_DONE ARDUINO_EVENT_WIFI_SCAN_DONE
#define ESPHOME_EVENT_ID_WIFI_STA_START ARDUINO_EVENT_WIFI_STA_START
#define ESPHOME_EVENT_ID_WIFI_STA_STOP ARDUINO_EVENT_WIFI_STA_STOP
#define ESPHOME_EVENT_ID_WIFI_STA_CONNECTED ARDUINO_EVENT_WIFI_STA_CONNECTED
#define ESPHOME_EVENT_ID_WIFI_STA_DISCONNECTED ARDUINO_EVENT_WIFI_STA_DISCONNECTED
#define ESPHOME_EVENT_ID_WIFI_STA_AUTHMODE_CHANGE ARDUINO_EVENT_WIFI_STA_AUTHMODE_CHANGE
#define ESPHOME_EVENT_ID_WIFI_STA_GOT_IP ARDUINO_EVENT_WIFI_STA_GOT_IP
#define ESPHOME_EVENT_ID_WIFI_STA_GOT_IP6 ARDUINO_EVENT_WIFI_STA_GOT_IP6
#define ESPHOME_EVENT_ID_WIFI_STA_LOST_IP ARDUINO_EVENT_WIFI_STA_LOST_IP
#define ESPHOME_EVENT_ID_WIFI_AP_START ARDUINO_EVENT_WIFI_AP_START
#define ESPHOME_EVENT_ID_WIFI_AP_STOP ARDUINO_EVENT_WIFI_AP_STOP
#define ESPHOME_EVENT_ID_WIFI_AP_STACONNECTED ARDUINO_EVENT_WIFI_AP_STACONNECTED
#define ESPHOME_EVENT_ID_WIFI_AP_STADISCONNECTED ARDUINO_EVENT_WIFI_AP_STADISCONNECTED
#define ESPHOME_EVENT_ID_WIFI_AP_STAIPASSIGNED ARDUINO_EVENT_WIFI_AP_STAIPASSIGNED
#define ESPHOME_EVENT_ID_WIFI_AP_PROBEREQRECVED ARDUINO_EVENT_WIFI_AP_PROBEREQRECVED
#define ESPHOME_EVENT_ID_WIFI_AP_GOT_IP6 ARDUINO_EVENT_WIFI_AP_GOT_IP6
using esphome_wifi_event_id_t = arduino_event_id_t;
using esphome_wifi_event_info_t = arduino_event_info_t;
// Event callback - runs in WiFi driver thread context
// Only queues events for processing in main loop, no logging or state changes here
void WiFiComponent::wifi_event_callback_(esphome_wifi_event_id_t event, esphome_wifi_event_info_t info) {
if (s_event_queue == nullptr) {
return;
}
// Allocate on heap and fill directly to avoid extra memcpy
auto *to_send = new LTWiFiEvent{}; // NOLINT(cppcoreguidelines-owning-memory)
to_send->event_id = event;
// Copy event-specific data
switch (event) {
case ESPHOME_EVENT_ID_WIFI_STA_CONNECTED: {
auto &it = info.wifi_sta_connected;
to_send->data.sta_connected.ssid_len = it.ssid_len;
memcpy(to_send->data.sta_connected.ssid, it.ssid,
std::min(static_cast<size_t>(it.ssid_len), sizeof(to_send->data.sta_connected.ssid) - 1));
memcpy(to_send->data.sta_connected.bssid, it.bssid, 6);
to_send->data.sta_connected.channel = it.channel;
to_send->data.sta_connected.authmode = it.authmode;
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_DISCONNECTED: {
auto &it = info.wifi_sta_disconnected;
to_send->data.sta_disconnected.ssid_len = it.ssid_len;
memcpy(to_send->data.sta_disconnected.ssid, it.ssid,
std::min(static_cast<size_t>(it.ssid_len), sizeof(to_send->data.sta_disconnected.ssid) - 1));
memcpy(to_send->data.sta_disconnected.bssid, it.bssid, 6);
to_send->data.sta_disconnected.reason = it.reason;
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_AUTHMODE_CHANGE: {
auto &it = info.wifi_sta_authmode_change;
to_send->data.sta_authmode_change.old_mode = it.old_mode;
to_send->data.sta_authmode_change.new_mode = it.new_mode;
break;
}
case ESPHOME_EVENT_ID_WIFI_SCAN_DONE: {
auto &it = info.wifi_scan_done;
to_send->data.scan_done.status = it.status;
to_send->data.scan_done.number = it.number;
to_send->data.scan_done.scan_id = it.scan_id;
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_PROBEREQRECVED: {
auto &it = info.wifi_ap_probereqrecved;
memcpy(to_send->data.ap_probe_req.mac, it.mac, 6);
to_send->data.ap_probe_req.rssi = it.rssi;
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_STACONNECTED: {
auto &it = info.wifi_sta_connected;
memcpy(to_send->data.sta_connected.bssid, it.bssid, 6);
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_STADISCONNECTED: {
auto &it = info.wifi_sta_disconnected;
memcpy(to_send->data.sta_disconnected.bssid, it.bssid, 6);
break;
}
case ESPHOME_EVENT_ID_WIFI_READY:
case ESPHOME_EVENT_ID_WIFI_STA_START:
case ESPHOME_EVENT_ID_WIFI_STA_STOP:
case ESPHOME_EVENT_ID_WIFI_STA_GOT_IP:
case ESPHOME_EVENT_ID_WIFI_STA_GOT_IP6:
case ESPHOME_EVENT_ID_WIFI_STA_LOST_IP:
case ESPHOME_EVENT_ID_WIFI_AP_START:
case ESPHOME_EVENT_ID_WIFI_AP_STOP:
case ESPHOME_EVENT_ID_WIFI_AP_STAIPASSIGNED:
// No additional data needed
break;
default:
// Unknown event, don't queue
delete to_send; // NOLINT(cppcoreguidelines-owning-memory)
return;
}
// Queue event (don't block if queue is full)
if (xQueueSend(s_event_queue, &to_send, 0) != pdPASS) {
delete to_send; // NOLINT(cppcoreguidelines-owning-memory)
s_event_queue_overflow_count++;
}
}
// Process a single event from the queue - runs in main loop context
void WiFiComponent::wifi_process_event_(LTWiFiEvent *event) {
switch (event->event_id) {
case ESPHOME_EVENT_ID_WIFI_READY: {
ESP_LOGV(TAG, "Ready");
break;
}
case ESPHOME_EVENT_ID_WIFI_SCAN_DONE: {
auto &it = event->data.scan_done;
ESP_LOGV(TAG, "Scan done: status=%" PRIu32 " number=%u scan_id=%u", it.status, it.number, it.scan_id);
this->wifi_scan_done_callback_();
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_START: {
ESP_LOGV(TAG, "STA start");
WiFi.setHostname(App.get_name().c_str());
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_STOP: {
ESP_LOGV(TAG, "STA stop");
s_sta_state = LTWiFiSTAState::IDLE;
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_CONNECTED: {
auto &it = event->data.sta_connected;
char bssid_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
format_mac_addr_upper(it.bssid, bssid_buf);
ESP_LOGV(TAG, "Connected ssid='%.*s' bssid=" LOG_SECRET("%s") " channel=%u, authmode=%s", it.ssid_len,
(const char *) it.ssid, bssid_buf, it.channel, get_auth_mode_str(it.authmode));
// Note: We don't set CONNECTED state here yet - wait for GOT_IP
// This matches ESP32 IDF behavior where s_sta_connected is set but
// wifi_sta_connect_status_() also checks got_ipv4_address_
#ifdef USE_WIFI_CONNECT_STATE_LISTENERS
for (auto *listener : this->connect_state_listeners_) {
listener->on_wifi_connect_state(StringRef(it.ssid, it.ssid_len), it.bssid);
}
#endif
// For static IP configurations, GOT_IP event may not fire, so set connected state here
#ifdef USE_WIFI_MANUAL_IP
if (const WiFiAP *config = this->get_selected_sta_(); config && config->get_manual_ip().has_value()) {
s_sta_state = LTWiFiSTAState::CONNECTED;
#ifdef USE_WIFI_IP_STATE_LISTENERS
for (auto *listener : this->ip_state_listeners_) {
listener->on_ip_state(this->wifi_sta_ip_addresses(), this->get_dns_address(0), this->get_dns_address(1));
}
#endif
}
#endif
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_DISCONNECTED: {
auto &it = event->data.sta_disconnected;
// LibreTiny can send spurious disconnect events with empty ssid/bssid during connection.
// These are typically "Association Leave" events that don't indicate actual failures:
// [W][wifi_lt]: Disconnected ssid='' bssid=00:00:00:00:00:00 reason='Association Leave'
// [W][wifi_lt]: Disconnected ssid='' bssid=00:00:00:00:00:00 reason='Association Leave'
// [V][wifi_lt]: Connected ssid='WIFI' bssid=... channel=3, authmode=WPA2 PSK
// Without this check, the spurious events would transition state to ERROR_FAILED,
// causing wifi_sta_connect_status_() to return an error. The main loop would then
// call retry_connect(), aborting a connection that may succeed moments later.
// Only ignore benign reasons - real failures like NO_AP_FOUND should still be processed.
// However, if we get too many of these events (IGNORED_DISCONNECT_THRESHOLD), treat it
// as a real connection failure to avoid waiting the full timeout for a failing connection.
if (it.ssid_len == 0 && s_sta_state == LTWiFiSTAState::CONNECTING && it.reason != WIFI_REASON_NO_AP_FOUND) {
s_ignored_disconnect_count++;
if (s_ignored_disconnect_count >= IGNORED_DISCONNECT_THRESHOLD) {
ESP_LOGW(TAG, "Too many disconnect events (%u) while connecting, treating as failure (reason=%s)",
s_ignored_disconnect_count, get_disconnect_reason_str(it.reason));
s_sta_state = LTWiFiSTAState::ERROR_FAILED;
WiFi.disconnect();
this->error_from_callback_ = true;
// Don't break - fall through to notify listeners
} else {
ESP_LOGV(TAG, "Ignoring disconnect event with empty ssid while connecting (reason=%s, count=%u)",
get_disconnect_reason_str(it.reason), s_ignored_disconnect_count);
break;
}
}
if (it.reason == WIFI_REASON_NO_AP_FOUND) {
ESP_LOGW(TAG, "Disconnected ssid='%.*s' reason='Probe Request Unsuccessful'", it.ssid_len,
(const char *) it.ssid);
s_sta_state = LTWiFiSTAState::ERROR_NOT_FOUND;
} else {
char bssid_s[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
format_mac_addr_upper(it.bssid, bssid_s);
ESP_LOGW(TAG, "Disconnected ssid='%.*s' bssid=" LOG_SECRET("%s") " reason='%s'", it.ssid_len,
(const char *) it.ssid, bssid_s, get_disconnect_reason_str(it.reason));
s_sta_state = LTWiFiSTAState::ERROR_FAILED;
}
uint8_t reason = it.reason;
if (reason == WIFI_REASON_AUTH_EXPIRE || reason == WIFI_REASON_BEACON_TIMEOUT ||
reason == WIFI_REASON_NO_AP_FOUND || reason == WIFI_REASON_ASSOC_FAIL ||
reason == WIFI_REASON_HANDSHAKE_TIMEOUT) {
WiFi.disconnect();
this->error_from_callback_ = true;
}
#ifdef USE_WIFI_CONNECT_STATE_LISTENERS
static constexpr uint8_t EMPTY_BSSID[6] = {};
for (auto *listener : this->connect_state_listeners_) {
listener->on_wifi_connect_state(StringRef(), EMPTY_BSSID);
}
#endif
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_AUTHMODE_CHANGE: {
auto &it = event->data.sta_authmode_change;
ESP_LOGV(TAG, "Authmode Change old=%s new=%s", get_auth_mode_str(it.old_mode), get_auth_mode_str(it.new_mode));
// Mitigate CVE-2020-12638
// https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors
if (it.old_mode != WIFI_AUTH_OPEN && it.new_mode == WIFI_AUTH_OPEN) {
ESP_LOGW(TAG, "Potential Authmode downgrade detected, disconnecting");
WiFi.disconnect();
this->error_from_callback_ = true;
s_sta_state = LTWiFiSTAState::ERROR_FAILED;
}
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_GOT_IP: {
char ip_buf[network::IP_ADDRESS_BUFFER_SIZE], gw_buf[network::IP_ADDRESS_BUFFER_SIZE];
ESP_LOGV(TAG, "static_ip=%s gateway=%s", network::IPAddress(WiFi.localIP()).str_to(ip_buf),
network::IPAddress(WiFi.gatewayIP()).str_to(gw_buf));
s_sta_state = LTWiFiSTAState::CONNECTED;
#ifdef USE_WIFI_IP_STATE_LISTENERS
for (auto *listener : this->ip_state_listeners_) {
listener->on_ip_state(this->wifi_sta_ip_addresses(), this->get_dns_address(0), this->get_dns_address(1));
}
#endif
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_GOT_IP6: {
ESP_LOGV(TAG, "Got IPv6");
#ifdef USE_WIFI_IP_STATE_LISTENERS
for (auto *listener : this->ip_state_listeners_) {
listener->on_ip_state(this->wifi_sta_ip_addresses(), this->get_dns_address(0), this->get_dns_address(1));
}
#endif
break;
}
case ESPHOME_EVENT_ID_WIFI_STA_LOST_IP: {
ESP_LOGV(TAG, "Lost IP");
// Don't change state to IDLE - let the disconnect event handle that
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_START: {
ESP_LOGV(TAG, "AP start");
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_STOP: {
ESP_LOGV(TAG, "AP stop");
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_STACONNECTED: {
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
auto &it = event->data.sta_connected;
char mac_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
format_mac_addr_upper(it.bssid, mac_buf);
ESP_LOGV(TAG, "AP client connected MAC=%s", mac_buf);
#endif
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_STADISCONNECTED: {
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
auto &it = event->data.sta_disconnected;
char mac_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
format_mac_addr_upper(it.bssid, mac_buf);
ESP_LOGV(TAG, "AP client disconnected MAC=%s", mac_buf);
#endif
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_STAIPASSIGNED: {
ESP_LOGV(TAG, "AP client assigned IP");
break;
}
case ESPHOME_EVENT_ID_WIFI_AP_PROBEREQRECVED: {
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
auto &it = event->data.ap_probe_req;
char mac_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
format_mac_addr_upper(it.mac, mac_buf);
ESP_LOGVV(TAG, "AP receive Probe Request MAC=%s RSSI=%d", mac_buf, it.rssi);
#endif
break;
}
default:
break;
}
}
void WiFiComponent::wifi_pre_setup_() {
// Create event queue for thread-safe event handling
// Events are pushed from WiFi callback thread and processed in main loop
s_event_queue = xQueueCreate(EVENT_QUEUE_SIZE, sizeof(LTWiFiEvent *));
if (s_event_queue == nullptr) {
ESP_LOGE(TAG, "Failed to create event queue");
return;
}
auto f = std::bind(&WiFiComponent::wifi_event_callback_, this, std::placeholders::_1, std::placeholders::_2);
WiFi.onEvent(f);
// Make sure WiFi is in clean state before anything starts
this->wifi_mode_(false, false);
}
WiFiSTAConnectStatus WiFiComponent::wifi_sta_connect_status_() {
// Use state machine instead of querying WiFi.status() directly
// State is updated in main loop from queued events, ensuring thread safety
switch (s_sta_state) {
case LTWiFiSTAState::CONNECTED:
return WiFiSTAConnectStatus::CONNECTED;
case LTWiFiSTAState::ERROR_NOT_FOUND:
return WiFiSTAConnectStatus::ERROR_NETWORK_NOT_FOUND;
case LTWiFiSTAState::ERROR_FAILED:
return WiFiSTAConnectStatus::ERROR_CONNECT_FAILED;
case LTWiFiSTAState::CONNECTING:
return WiFiSTAConnectStatus::CONNECTING;
case LTWiFiSTAState::IDLE:
default:
return WiFiSTAConnectStatus::IDLE;
}
}
bool WiFiComponent::wifi_scan_start_(bool passive) {
// enable STA
if (!this->wifi_mode_(true, {}))
return false;
// need to use WiFi because of WiFiScanClass allocations :(
int16_t err = WiFi.scanNetworks(true, true, passive, 200);
if (err != WIFI_SCAN_RUNNING) {
ESP_LOGV(TAG, "WiFi.scanNetworks failed: %d", err);
return false;
}
return true;
}
void WiFiComponent::wifi_scan_done_callback_() {
this->scan_result_.clear();
this->scan_done_ = true;
int16_t num = WiFi.scanComplete();
if (num < 0)
return;
this->scan_result_.init(static_cast<unsigned int>(num));
for (int i = 0; i < num; i++) {
String ssid = WiFi.SSID(i);
wifi_auth_mode_t authmode = WiFi.encryptionType(i);
int32_t rssi = WiFi.RSSI(i);
uint8_t *bssid = WiFi.BSSID(i);
int32_t channel = WiFi.channel(i);
this->scan_result_.emplace_back(bssid_t{bssid[0], bssid[1], bssid[2], bssid[3], bssid[4], bssid[5]},
std::string(ssid.c_str()), channel, rssi, authmode != WIFI_AUTH_OPEN,
ssid.length() == 0);
}
WiFi.scanDelete();
#ifdef USE_WIFI_SCAN_RESULTS_LISTENERS
for (auto *listener : this->scan_results_listeners_) {
listener->on_wifi_scan_results(this->scan_result_);
}
#endif
}
#ifdef USE_WIFI_AP
bool WiFiComponent::wifi_ap_ip_config_(const optional<ManualIP> &manual_ip) {
// enable AP
if (!this->wifi_mode_({}, true))
return false;
if (manual_ip.has_value()) {
return WiFi.softAPConfig(manual_ip->static_ip, manual_ip->gateway, manual_ip->subnet);
} else {
return WiFi.softAPConfig(IPAddress(192, 168, 4, 1), IPAddress(192, 168, 4, 1), IPAddress(255, 255, 255, 0));
}
}
bool WiFiComponent::wifi_start_ap_(const WiFiAP &ap) {
// enable AP
if (!this->wifi_mode_({}, true))
return false;
#ifdef USE_WIFI_MANUAL_IP
if (!this->wifi_ap_ip_config_(ap.get_manual_ip())) {
ESP_LOGV(TAG, "wifi_ap_ip_config_ failed");
return false;
}
#else
if (!this->wifi_ap_ip_config_({})) {
ESP_LOGV(TAG, "wifi_ap_ip_config_ failed");
return false;
}
#endif
yield();
return WiFi.softAP(ap.get_ssid().c_str(), ap.get_password().empty() ? NULL : ap.get_password().c_str(),
ap.has_channel() ? ap.get_channel() : 1, ap.get_hidden());
}
network::IPAddress WiFiComponent::wifi_soft_ap_ip() { return {WiFi.softAPIP()}; }
#endif // USE_WIFI_AP
bool WiFiComponent::wifi_disconnect_() {
// Reset state first so disconnect events aren't ignored
// and wifi_sta_connect_status_() returns IDLE instead of CONNECTING
s_sta_state = LTWiFiSTAState::IDLE;
return WiFi.disconnect();
}
bssid_t WiFiComponent::wifi_bssid() {
bssid_t bssid{};
uint8_t *raw_bssid = WiFi.BSSID();
if (raw_bssid != nullptr) {
for (size_t i = 0; i < bssid.size(); i++)
bssid[i] = raw_bssid[i];
}
return bssid;
}
std::string WiFiComponent::wifi_ssid() { return WiFi.SSID().c_str(); }
const char *WiFiComponent::wifi_ssid_to(std::span<char, SSID_BUFFER_SIZE> buffer) {
// TODO: Find direct LibreTiny API to avoid Arduino String allocation
String ssid = WiFi.SSID();
size_t len = std::min(static_cast<size_t>(ssid.length()), SSID_BUFFER_SIZE - 1);
memcpy(buffer.data(), ssid.c_str(), len);
buffer[len] = '\0';
return buffer.data();
}
int8_t WiFiComponent::wifi_rssi() { return WiFi.status() == WL_CONNECTED ? WiFi.RSSI() : WIFI_RSSI_DISCONNECTED; }
int32_t WiFiComponent::get_wifi_channel() { return WiFi.channel(); }
network::IPAddress WiFiComponent::wifi_subnet_mask_() { return {WiFi.subnetMask()}; }
network::IPAddress WiFiComponent::wifi_gateway_ip_() { return {WiFi.gatewayIP()}; }
network::IPAddress WiFiComponent::wifi_dns_ip_(int num) { return {WiFi.dnsIP(num)}; }
void WiFiComponent::wifi_loop_() {
// Process all pending events from the queue
if (s_event_queue == nullptr) {
return;
}
// Check for dropped events due to queue overflow
if (s_event_queue_overflow_count > 0) {
ESP_LOGW(TAG, "Event queue overflow, %" PRIu32 " events dropped", s_event_queue_overflow_count);
s_event_queue_overflow_count = 0;
}
while (true) {
LTWiFiEvent *event;
if (xQueueReceive(s_event_queue, &event, 0) != pdTRUE) {
// No more events
break;
}
wifi_process_event_(event);
delete event; // NOLINT(cppcoreguidelines-owning-memory)
}
}
} // namespace esphome::wifi
#endif // USE_LIBRETINY
#endif
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