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ESPEasyWifi.cpp
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#include "../ESPEasyCore/ESPEasyWifi.h"
#include "../../ESPEasy-Globals.h"
#include "../DataStructs/TimingStats.h"
#include "../ESPEasyCore/ESPEasyNetwork.h"
#include "../ESPEasyCore/ESPEasyWiFiEvent.h"
#include "../ESPEasyCore/ESPEasyWifi_ProcessEvent.h"
#include "../ESPEasyCore/ESPEasy_Log.h"
#include "../ESPEasyCore/Serial.h"
#include "../Globals/ESPEasyWiFiEvent.h"
#include "../Globals/EventQueue.h"
#include "../Globals/NetworkState.h"
#include "../Globals/RTC.h"
#include "../Globals/SecuritySettings.h"
#include "../Globals/Services.h"
#include "../Globals/Settings.h"
#include "../Globals/WiFi_AP_Candidates.h"
#include "../Helpers/ESPEasy_time_calc.h"
#include "../Helpers/Misc.h"
#include "../Helpers/Networking.h"
#include "../Helpers/StringConverter.h"
#include "../Helpers/StringGenerator_WiFi.h"
// ********************************************************************************
// WiFi state
// ********************************************************************************
/*
WiFi STA states:
1 STA off => ESPEASY_WIFI_DISCONNECTED
2 STA connecting
3 STA connected => ESPEASY_WIFI_CONNECTED
4 STA got IP => ESPEASY_WIFI_GOT_IP
5 STA connected && got IP => ESPEASY_WIFI_SERVICES_INITIALIZED
N.B. the states are flags, meaning both "connected" and "got IP" must be set
to be considered ESPEASY_WIFI_SERVICES_INITIALIZED
The flag wifiConnectAttemptNeeded indicates whether a new connect attempt is needed.
This is set to true when:
- Security settings have been saved with AP mode enabled. FIXME TD-er, this may not be the best check.
- WiFi connect timeout reached & No client is connected to the AP mode of the node.
- Wifi is reset
- WiFi setup page has been loaded with SSID/pass values.
WiFi AP mode states:
1 AP on => reset AP disable timer
2 AP client connect/disconnect => reset AP disable timer
3 AP off => AP disable timer = 0;
AP mode will be disabled when both apply:
- AP disable timer (timerAPoff) expired
- No client is connected to the AP.
AP mode will be enabled when at least one applies:
- No valid WiFi settings
- Start AP timer (timerAPstart) expired
Start AP timer is set or cleared at:
- Set timerAPstart when "valid WiFi connection" state is observed.
- Disable timerAPstart when ESPEASY_WIFI_SERVICES_INITIALIZED wifi state is reached.
For the first attempt to connect after a cold boot (RTC values are 0), a WiFi scan will be
performed to find the strongest known SSID.
This will set RTC.lastBSSID and RTC.lastWiFiChannel
Quick reconnect (using BSSID/channel of last connection) when both apply:
- If wifi_connect_attempt < 3
- RTC.lastBSSID is known
- RTC.lastWiFiChannel != 0
Change of wifi settings when both apply:
- "other" settings valid
- (wifi_connect_attempt % 2) == 0
Reset of wifi_connect_attempt to 0 when both apply:
- connection successful
- Connection stable (connected for > 5 minutes)
*/
// ********************************************************************************
// Check WiFi connected status
// This is basically the state machine to switch between states:
// - Initiate WiFi reconnect
// - Start/stop of AP mode
// ********************************************************************************
bool WiFiConnected() {
START_TIMER;
static bool recursiveCall = false;
if (WiFiEventData.unprocessedWifiEvents()) { return false; }
bool wifi_isconnected = false;
#ifdef ESP8266
// Perform check on SDK function, see: https://github.com/esp8266/Arduino/issues/7432
station_status_t status = wifi_station_get_connect_status();
switch(status) {
case STATION_GOT_IP:
wifi_isconnected = true;
break;
case STATION_NO_AP_FOUND:
case STATION_CONNECT_FAIL:
case STATION_WRONG_PASSWORD:
wifi_isconnected = false;
break;
case STATION_IDLE:
case STATION_CONNECTING:
wifi_isconnected = WiFiEventData.WiFiServicesInitialized();
break;
default:
wifi_isconnected = false;
break;
}
#endif
#ifdef ESP32
if (WiFi.isConnected()) {
wifi_isconnected = true;
}
#endif
if (recursiveCall) return wifi_isconnected;
recursiveCall = true;
// For ESP82xx, do not rely on WiFi.status() with event based wifi.
const int32_t wifi_rssi = WiFi.RSSI();
bool validWiFi = (wifi_rssi < 0) && wifi_isconnected && hasIPaddr();
/*
if (validWiFi && WiFi.channel() != WiFiEventData.usedChannel) {
validWiFi = false;
}
*/
if (validWiFi != WiFiEventData.WiFiServicesInitialized()) {
// else wifiStatus is no longer in sync.
if (checkAndResetWiFi()) {
// Wifi has been reset, so no longer valid WiFi
validWiFi = false;
}
}
if (validWiFi) {
// Connected, thus disable any timer to start AP mode. (except when in WiFi setup mode)
if (!WiFiEventData.wifiSetupConnect) {
WiFiEventData.timerAPstart.clear();
}
STOP_TIMER(WIFI_ISCONNECTED_STATS);
recursiveCall = false;
// Only return true after some time since it got connected.
SetWiFiTXpower();
return WiFiEventData.wifi_considered_stable || WiFiEventData.lastConnectMoment.timeoutReached(100);
}
if ((WiFiEventData.timerAPstart.isSet()) && WiFiEventData.timerAPstart.timeReached()) {
// Timer reached, so enable AP mode.
if (!WifiIsAP(WiFi.getMode())) {
if (!Settings.DoNotStartAP()) {
setAP(true);
}
}
WiFiEventData.timerAPstart.clear();
}
// When made this far in the code, we apparently do not have valid WiFi connection.
if (!WiFiEventData.timerAPstart.isSet() && !WifiIsAP(WiFi.getMode())) {
// First run we do not have WiFi connection any more, set timer to start AP mode
// Only allow the automatic AP mode in the first N minutes after boot.
if (getUptimeMinutes() < WIFI_ALLOW_AP_AFTERBOOT_PERIOD) {
WiFiEventData.timerAPstart.setMillisFromNow(WIFI_RECONNECT_WAIT);
// Fixme TD-er: Make this more elegant as it now needs to know about the extra time needed for the AP start timer.
WiFiEventData.timerAPoff.setMillisFromNow(WIFI_RECONNECT_WAIT + WIFI_AP_OFF_TIMER_DURATION);
}
}
if (wifiConnectTimeoutReached() && !WiFiEventData.wifiSetup) {
// It took too long to make a connection, set flag we need to try again
//if (!wifiAPmodeActivelyUsed()) {
WiFiEventData.wifiConnectAttemptNeeded = true;
//}
WiFiEventData.wifiConnectInProgress = false;
}
delay(0);
STOP_TIMER(WIFI_NOTCONNECTED_STATS);
recursiveCall = false;
return false;
}
void WiFiConnectRelaxed() {
if (!WiFiEventData.WiFiConnectAllowed() || WiFiEventData.wifiConnectInProgress) {
return; // already connected or connect attempt in progress need to disconnect first
}
if (!WiFiEventData.processedScanDone) {
// Scan is still active, so do not yet connect.
return;
}
if (WiFiEventData.unprocessedWifiEvents()) {
// Still need to process WiFi events
return;
}
if (!WiFiEventData.wifiSetupConnect && wifiAPmodeActivelyUsed()) {
return;
}
// FIXME TD-er: Should not try to prepare when a scan is still busy.
// This is a logic error which may lead to strange issues if some kind of timeout happens and/or RF calibration was not OK.
// Split this function into separate parts, with the last part being the actual connect attempt either after a scan is complete or quick connect is possible.
AttemptWiFiConnect();
}
void AttemptWiFiConnect() {
if (!WiFiEventData.wifiConnectAttemptNeeded) {
return;
}
if (WiFiEventData.wifiSetupConnect) {
// wifiSetupConnect is when run from the setup page.
RTC.clearLastWiFi(); // Force slow connect
WiFiEventData.wifi_connect_attempt = 0;
WiFiEventData.wifiSetupConnect = false;
if (WiFiEventData.timerAPoff.isSet()) {
WiFiEventData.timerAPoff.setMillisFromNow(WIFI_RECONNECT_WAIT + WIFI_AP_OFF_TIMER_DURATION);
}
}
if (WiFi_AP_Candidates.getNext(WiFiScanAllowed())) {
const WiFi_AP_Candidate& candidate = WiFi_AP_Candidates.getCurrent();
if (loglevelActiveFor(LOG_LEVEL_INFO)) {
String log = F("WIFI : Connecting ");
log += candidate.toString();
log += F(" attempt #");
log += WiFiEventData.wifi_connect_attempt;
addLog(LOG_LEVEL_INFO, log);
}
WiFiEventData.markWiFiBegin();
if (prepareWiFi()) {
float tx_pwr = 0; // Will be set higher based on RSSI when needed.
// FIXME TD-er: Must check WiFiEventData.wifi_connect_attempt to increase TX power
if (Settings.UseMaxTXpowerForSending()) {
tx_pwr = Settings.getWiFi_TX_power();
}
SetWiFiTXpower(tx_pwr, candidate.rssi);
if (candidate.allowQuickConnect()) {
WiFi.begin(candidate.ssid.c_str(), candidate.key.c_str(), candidate.channel, candidate.bssid);
} else {
WiFi.begin(candidate.ssid.c_str(), candidate.key.c_str());
}
// Start connect attempt now, so no longer needed to attempt new connection.
WiFiEventData.wifiConnectAttemptNeeded = false;
}
} else {
if (!wifiAPmodeActivelyUsed() || WiFiEventData.wifiSetupConnect) {
if (!prepareWiFi()) {
return;
}
// Maybe not scan async to give the ESP some slack in power consumption?
const bool async = true;
WifiScan(async);
}
}
logConnectionStatus();
}
// ********************************************************************************
// Set Wifi config
// ********************************************************************************
bool prepareWiFi() {
if (!WiFi_AP_Candidates.hasKnownCredentials()) {
if (!WiFiEventData.warnedNoValidWiFiSettings) {
addLog(LOG_LEVEL_ERROR, F("WIFI : No valid wifi settings"));
WiFiEventData.warnedNoValidWiFiSettings = true;
}
WiFiEventData.last_wifi_connect_attempt_moment.clear();
WiFiEventData.wifi_connect_attempt = 1;
WiFiEventData.wifiConnectAttemptNeeded = false;
// No need to wait longer to start AP mode.
if (!Settings.DoNotStartAP()) {
setAP(true);
}
return false;
}
WiFiEventData.warnedNoValidWiFiSettings = false;
setSTA(true);
char hostname[40];
safe_strncpy(hostname, NetworkCreateRFCCompliantHostname().c_str(), sizeof(hostname));
#if defined(ESP8266)
wifi_station_set_hostname(hostname);
#endif // if defined(ESP8266)
#if defined(ESP32)
WiFi.setHostname(hostname);
WiFi.config(INADDR_NONE, INADDR_NONE, INADDR_NONE);
#endif // if defined(ESP32)
setConnectionSpeed();
setupStaticIPconfig();
return true;
}
bool checkAndResetWiFi() {
#ifdef ESP8266
station_status_t status = wifi_station_get_connect_status();
switch(status) {
case STATION_GOT_IP:
if (WiFi.RSSI() < 0 && NetworkLocalIP().isSet()) {
//if (WiFi.channel() == WiFiEventData.usedChannel || WiFiEventData.usedChannel == 0) {
// This is a valid status, no need to reset
return false;
//}
}
break;
case STATION_NO_AP_FOUND:
case STATION_CONNECT_FAIL:
case STATION_WRONG_PASSWORD:
// Reason to reset WiFi
break;
case STATION_IDLE:
case STATION_CONNECTING:
if (!WiFiEventData.last_wifi_connect_attempt_moment.timeoutReached(15000)) {
return false;
}
break;
}
#endif
#ifdef ESP32
if (WiFi.isConnected()) {
//if (WiFi.channel() == WiFiEventData.usedChannel || WiFiEventData.usedChannel == 0) {
return false;
//}
}
if (!WiFiEventData.last_wifi_connect_attempt_moment.timeoutReached(15000)) {
return false;
}
#endif
String log = F("WiFi : WiFiConnected() out of sync: ");
log += ESPeasyWifiStatusToString();
log += F(" RSSI: ");
log += String(WiFi.RSSI());
#ifdef ESP8266
log += F(" status: ");
log += SDKwifiStatusToString(status);
#endif
// Call for reset first, to make sure a syslog call will not try to send.
resetWiFi();
addLog(LOG_LEVEL_INFO, log);
return true;
}
void resetWiFi() {
//if (wifiAPmodeActivelyUsed()) return;
if (WiFiEventData.lastWiFiResetMoment.isSet() && !WiFiEventData.lastWiFiResetMoment.timeoutReached(1000)) {
// Don't reset WiFi too often
return;
}
FeedSW_watchdog();
WiFiEventData.clearAll();
WifiDisconnect();
// Send this log only after WifiDisconnect() or else sending to syslog may cause issues
addLog(LOG_LEVEL_INFO, String(F("Reset WiFi.")));
// setWifiMode(WIFI_OFF);
initWiFi();
}
void initWiFi()
{
#ifdef ESP8266
// See https://github.com/esp8266/Arduino/issues/5527#issuecomment-460537616
// FIXME TD-er: Do not destruct WiFi object, it may cause crashes with queued UDP traffic.
WiFi.~ESP8266WiFiClass();
WiFi = ESP8266WiFiClass();
#endif // ifdef ESP8266
WiFi.persistent(false); // Do not use SDK storage of SSID/WPA parameters
// The WiFi.disconnect() ensures that the WiFi is working correctly. If this is not done before receiving WiFi connections,
// those WiFi connections will take a long time to make or sometimes will not work at all.
WiFi.disconnect(true);
setWifiMode(WIFI_OFF);
#if defined(ESP32)
wm_event_id = WiFi.onEvent(WiFiEvent);
#endif
#ifdef ESP8266
// WiFi event handlers
stationConnectedHandler = WiFi.onStationModeConnected(onConnected);
stationDisconnectedHandler = WiFi.onStationModeDisconnected(onDisconnect);
stationGotIpHandler = WiFi.onStationModeGotIP(onGotIP);
stationModeDHCPTimeoutHandler = WiFi.onStationModeDHCPTimeout(onDHCPTimeout);
stationModeAuthModeChangeHandler = WiFi.onStationModeAuthModeChanged(onStationModeAuthModeChanged);
APModeStationConnectedHandler = WiFi.onSoftAPModeStationConnected(onConnectedAPmode);
APModeStationDisconnectedHandler = WiFi.onSoftAPModeStationDisconnected(onDisconnectedAPmode);
#endif
}
// ********************************************************************************
// Configure WiFi TX power
// ********************************************************************************
void SetWiFiTXpower() {
SetWiFiTXpower(0.0f); // Just some minimal value, will be adjusted in SetWiFiTXpower
}
void SetWiFiTXpower(float dBm) {
SetWiFiTXpower(dBm, WiFi.RSSI());
}
void SetWiFiTXpower(float dBm, float rssi) {
const WiFiMode_t cur_mode = WiFi.getMode();
if (cur_mode == WIFI_OFF) {
return;
}
if (Settings.UseMaxTXpowerForSending()) {
dBm = 30; // Just some max, will be limited later
}
// Range ESP32 : 2dBm - 20dBm
// Range ESP8266: 0dBm - 20.5dBm
float maxTXpwr;
float threshold = GetRSSIthreshold(maxTXpwr);
float minTXpwr = 0;
threshold += Settings.WiFi_sensitivity_margin; // Margin in dBm on top of threshold
// Assume AP sends with max set by ETSI standard.
// 2.4 GHz: 100 mWatt (20 dBm)
// US and some other countries allow 1000 mW (30 dBm)
// We cannot send with over 20 dBm, thus it makes no sense to force higher TX power all the time.
const float newrssi = rssi - 20;
if (newrssi < threshold) {
minTXpwr = threshold - newrssi;
}
if (minTXpwr > maxTXpwr) {
minTXpwr = maxTXpwr;
}
if (dBm > maxTXpwr) {
dBm = maxTXpwr;
} else if (dBm < minTXpwr) {
dBm = minTXpwr;
}
#ifdef ESP32
wifi_power_t val = WIFI_POWER_MINUS_1dBm;
if (dBm < 0) {
val = WIFI_POWER_MINUS_1dBm;
dBm = -1;
} else if (dBm < 3.5) {
val = WIFI_POWER_2dBm;
dBm = 2;
} else if (dBm < 6) {
val = WIFI_POWER_5dBm;
dBm = 5;
} else if (dBm < 8) {
val = WIFI_POWER_7dBm;
dBm = 7;
} else if (dBm < 10) {
val = WIFI_POWER_8_5dBm;
dBm = 8.5;
} else if (dBm < 12) {
val = WIFI_POWER_11dBm;
dBm = 11;
} else if (dBm < 14) {
val = WIFI_POWER_13dBm;
dBm = 13;
} else if (dBm < 16) {
val = WIFI_POWER_15dBm;
dBm = 15;
} else if (dBm < 17.75) {
val = WIFI_POWER_17dBm;
dBm = 17;
} else if (dBm < 18.75) {
val = WIFI_POWER_18_5dBm;
dBm = 18.5;
} else if (dBm < 19.25) {
val = WIFI_POWER_19dBm;
dBm = 19;
} else {
val = WIFI_POWER_19_5dBm;
dBm = 19.5;
}
esp_wifi_set_max_tx_power(val);
//esp_wifi_get_max_tx_power(&val);
// dBm = static_cast<float>(val);
// dBm /= 4.0f;
#endif
#ifdef ESP8266
WiFi.setOutputPower(dBm);
#endif
if (WiFiEventData.wifi_TX_pwr < dBm) {
// Will increase the TX power, give power supply of the unit some rest
delay(1);
}
WiFiEventData.wifi_TX_pwr = dBm;
delay(0);
#ifndef BUILD_NO_DEBUG
if (loglevelActiveFor(LOG_LEVEL_DEBUG)) {
const int TX_pwr_int = WiFiEventData.wifi_TX_pwr * 4;
const int maxTXpwr_int = maxTXpwr * 4;
if (TX_pwr_int != maxTXpwr_int) {
static int last_log = -1;
if (TX_pwr_int != last_log) {
last_log = TX_pwr_int;
String log = F("WiFi : Set TX power to ");
log += String(dBm, 0);
log += F("dBm");
log += F(" sensitivity: ");
log += String(threshold, 0);
log += F("dBm");
if (rssi < 0) {
log += F(" RSSI: ");
log += String(rssi, 0);
log += F("dBm");
}
addLog(LOG_LEVEL_DEBUG, log);
}
}
}
#endif
}
float GetRSSIthreshold(float& maxTXpwr) {
maxTXpwr = Settings.getWiFi_TX_power();
float threshold = -72;
switch (getConnectionProtocol()) {
case WiFiConnectionProtocol::WiFi_Protocol_11b:
threshold = -91;
break;
case WiFiConnectionProtocol::WiFi_Protocol_11g:
threshold = -75;
if (maxTXpwr > 17) maxTXpwr = 17;
break;
case WiFiConnectionProtocol::WiFi_Protocol_11n:
threshold = -72;
if (maxTXpwr > 14) maxTXpwr = 14;
break;
case WiFiConnectionProtocol::Unknown:
break;
}
return threshold;
}
WiFiConnectionProtocol getConnectionProtocol() {
if (WiFi.RSSI() < 0) {
#ifdef ESP8266
switch (wifi_get_phy_mode()) {
case PHY_MODE_11B:
return WiFiConnectionProtocol::WiFi_Protocol_11b;
case PHY_MODE_11G:
return WiFiConnectionProtocol::WiFi_Protocol_11g;
case PHY_MODE_11N:
return WiFiConnectionProtocol::WiFi_Protocol_11n;
}
#endif
#ifdef ESP32
uint8_t protocol;
esp_wifi_get_protocol(WIFI_IF_STA, &protocol);
if (protocol & WIFI_PROTOCOL_11N) {
return WiFiConnectionProtocol::WiFi_Protocol_11n;
}
if (protocol & WIFI_PROTOCOL_11G) {
return WiFiConnectionProtocol::WiFi_Protocol_11g;
}
if (protocol & WIFI_PROTOCOL_11B) {
return WiFiConnectionProtocol::WiFi_Protocol_11b;
}
#endif
}
return WiFiConnectionProtocol::Unknown;
}
// ********************************************************************************
// Disconnect from Wifi AP
// ********************************************************************************
void WifiDisconnect()
{
#if defined(ESP32)
WiFi.disconnect();
WiFi.removeEvent(wm_event_id);
#else // if defined(ESP32)
ETS_UART_INTR_DISABLE();
wifi_station_disconnect();
ETS_UART_INTR_ENABLE();
#endif // if defined(ESP32)
WiFiEventData.setWiFiDisconnected();
WiFiEventData.markDisconnect(WIFI_DISCONNECT_REASON_ASSOC_LEAVE);
delay(1);
}
// ********************************************************************************
// Scan WiFi network
// ********************************************************************************
void WiFiScanPeriodical() {
WiFi_AP_Candidates.purge_expired();
if (!Settings.PeriodicalScanWiFi()) {
return;
}
if (active_network_medium == NetworkMedium_t::Ethernet) {
return;
}
const bool async = true;
WifiScan(async);
}
bool WiFiScanAllowed() {
if (WiFi_AP_Candidates.scanComplete() == WIFI_SCAN_RUNNING) {
return false;
}
if (!WiFiEventData.processedScanDone) {
processScanDone();
}
if (WiFiEventData.unprocessedWifiEvents()) {
handle_unprocessedNetworkEvents();
}
if (WiFiEventData.unprocessedWifiEvents()) {
if (loglevelActiveFor(LOG_LEVEL_ERROR)) {
String log = F("WiFi : Scan not allowed, unprocessed WiFi events: ");
if (!WiFiEventData.processedConnect) {
log += F(" conn");
}
if (!WiFiEventData.processedDisconnect) {
log += F(" disconn");
}
if (!WiFiEventData.processedGotIP) {
log += F(" gotIP");
}
if (!WiFiEventData.processedDHCPTimeout) {
log += F(" DHCP_t/o");
}
addLog(LOG_LEVEL_ERROR, log);
}
return false;
}
/*
if (!wifiAPmodeActivelyUsed() && !NetworkConnected()) {
return true;
}
*/
WiFi_AP_Candidates.purge_expired();
if (WiFiEventData.wifiConnectInProgress) {
return false;
}
if (NetworkConnected() && WiFi_AP_Candidates.getBestCandidate().usable()) {
addLog(LOG_LEVEL_ERROR, F("WiFi : Scan not needed, good candidate present"));
return false;
}
if (WiFiEventData.lastDisconnectMoment.isSet() && WiFiEventData.lastDisconnectMoment.millisPassedSince() < WIFI_RECONNECT_WAIT) {
if (!NetworkConnected()) {
return true;
}
}
if (WiFiEventData.lastScanMoment.isSet()) {
const LongTermTimer::Duration scanInterval = wifiAPmodeActivelyUsed() ? WIFI_SCAN_INTERVAL_AP_USED : WIFI_SCAN_INTERVAL_MINIMAL;
if (WiFiEventData.lastScanMoment.millisPassedSince() < scanInterval) {
return false;
}
}
return true;
}
void WifiScan(bool async, uint8_t channel) {
if (!WiFiScanAllowed()) {
return;
}
START_TIMER;
WiFiEventData.lastScanMoment.setNow();
if (loglevelActiveFor(LOG_LEVEL_INFO)) {
if (channel == 0) {
addLog(LOG_LEVEL_INFO, F("WiFi : Start network scan all channels"));
} else {
String log;
log = F("WiFi : Start network scan channel ");
log += channel;
addLog(LOG_LEVEL_INFO, log);
}
}
bool show_hidden = true;
WiFiEventData.processedScanDone = false;
WiFiEventData.lastGetScanMoment.setNow();
WiFiEventData.lastScanChannel = channel;
unsigned int nrScans = 1 + (async ? 0 : Settings.NumberExtraWiFiScans);
while (nrScans > 0) {
if (!async) {
WiFi_AP_Candidates.begin_sync_scan();
FeedSW_watchdog();
}
--nrScans;
#ifdef ESP8266
WiFi.scanNetworks(async, show_hidden, channel);
#endif
#ifdef ESP32
const bool passive = false;
const uint32_t max_ms_per_chan = 300;
WiFi.scanNetworks(async, show_hidden, passive, max_ms_per_chan /*, channel */);
#endif
if (!async) {
FeedSW_watchdog();
processScanDone();
}
}
STOP_TIMER(async ? WIFI_SCAN_ASYNC : WIFI_SCAN_SYNC);
}
// ********************************************************************************
// Scan all Wifi Access Points
// ********************************************************************************
void WifiScan()
{
// Direct Serial is allowed here, since this function will only be called from serial input.
serialPrintln(F("WIFI : SSID Scan start"));
if (WiFi_AP_Candidates.scanComplete() <= 0) {
WiFiMode_t cur_wifimode = WiFi.getMode();
WifiScan(false);
setWifiMode(cur_wifimode);
}
const int8_t scanCompleteStatus = WiFi_AP_Candidates.scanComplete();
if (scanCompleteStatus <= 0) {
serialPrintln(F("WIFI : No networks found"));
}
else
{
serialPrint(F("WIFI : "));
serialPrint(String(scanCompleteStatus));
serialPrintln(F(" networks found"));
int i = 0;
for (auto it = WiFi_AP_Candidates.scanned_begin(); it != WiFi_AP_Candidates.scanned_end(); ++it)
{
++i;
// Print SSID and RSSI for each network found
serialPrint(F("WIFI : "));
serialPrint(String(i));
serialPrint(": ");
serialPrintln(it->toString());
delay(10);
}
}
serialPrintln("");
}
// ********************************************************************************
// Manage Wifi Modes
// ********************************************************************************
void setSTA(bool enable) {
switch (WiFi.getMode()) {
case WIFI_OFF:
if (enable) { setWifiMode(WIFI_STA); }
break;
case WIFI_STA:
if (!enable) { setWifiMode(WIFI_OFF); }
break;
case WIFI_AP:
if (enable) { setWifiMode(WIFI_AP_STA); }
break;
case WIFI_AP_STA:
if (!enable) { setWifiMode(WIFI_AP); }
break;
default:
break;
}
}
void setAP(bool enable) {
WiFiMode_t wifimode = WiFi.getMode();
switch (wifimode) {
case WIFI_OFF:
if (enable) {
WifiScan(false);
setWifiMode(WIFI_AP);
}
break;
case WIFI_STA:
if (enable) { setWifiMode(WIFI_AP_STA); }
break;
case WIFI_AP:
if (!enable) { setWifiMode(WIFI_OFF); }
break;
case WIFI_AP_STA:
if (!enable) { setWifiMode(WIFI_STA); }
break;
default:
break;
}
}
// Only internal scope
void setAPinternal(bool enable)
{
if (enable) {
// create and store unique AP SSID/PW to prevent ESP from starting AP mode with default SSID and No password!
// setup ssid for AP Mode when needed
String softAPSSID = NetworkCreateRFCCompliantHostname();
String pwd = SecuritySettings.WifiAPKey;
IPAddress subnet(DEFAULT_AP_SUBNET);
if (!WiFi.softAPConfig(apIP, apIP, subnet)) {
addLog(LOG_LEVEL_ERROR, F("WIFI : [AP] softAPConfig failed!"));
}
if (WiFi.softAP(softAPSSID.c_str(), pwd.c_str())) {
if (loglevelActiveFor(LOG_LEVEL_INFO)) {
eventQueue.add(F("WiFi#APmodeEnabled"));
String log(F("WIFI : AP Mode ssid will be "));
log += softAPSSID;
log += F(" with address ");
log += WiFi.softAPIP().toString();
addLog(LOG_LEVEL_INFO, log);
}
} else {
if (loglevelActiveFor(LOG_LEVEL_ERROR)) {
String log(F("WIFI : Error while starting AP Mode with SSID: "));
log += softAPSSID;
log += F(" IP: ");
log += apIP.toString();
addLog(LOG_LEVEL_ERROR, log);
}
}
#ifdef ESP32
#else // ifdef ESP32
if (wifi_softap_dhcps_status() != DHCP_STARTED) {
if (!wifi_softap_dhcps_start()) {
addLog(LOG_LEVEL_ERROR, F("WIFI : [AP] wifi_softap_dhcps_start failed!"));
}
}
#endif // ifdef ESP32
WiFiEventData.timerAPoff.setMillisFromNow(WIFI_AP_OFF_TIMER_DURATION);
} else {
#ifdef FEATURE_DNS_SERVER
if (dnsServerActive) {
dnsServerActive = false;
dnsServer.stop();
}
#endif
}
}
String getWifiModeString(WiFiMode_t wifimode)
{
switch (wifimode) {
case WIFI_OFF: return F("OFF");
case WIFI_STA: return F("STA");
case WIFI_AP: return F("AP");
case WIFI_AP_STA: return F("AP+STA");
default:
break;
}
return F("Unknown");
}
void setWifiMode(WiFiMode_t wifimode) {
const WiFiMode_t cur_mode = WiFi.getMode();
if (cur_mode == wifimode) {
return;
}
if (cur_mode == WIFI_OFF) {
#if defined(ESP32)
esp_wifi_set_ps(WIFI_PS_NONE);
#endif
#ifdef ESP8266
// See: https://github.com/esp8266/Arduino/issues/6172#issuecomment-500457407
WiFi.forceSleepWake(); // Make sure WiFi is really active.
#endif // ifdef ESP8266
delay(100);
}
addLog(LOG_LEVEL_INFO, String(F("WIFI : Set WiFi to ")) + getWifiModeString(wifimode));
int retry = 2;
while (!WiFi.mode(wifimode) && retry > 0) {
addLog(LOG_LEVEL_INFO, F("WIFI : Cannot set mode!!!!!"));
delay(100);
--retry;
}
retry = 2;
while (WiFi.getMode() != wifimode && retry > 0) {
addLog(LOG_LEVEL_INFO, F("WIFI : mode not yet set"));
delay(100);
--retry;
}
if (wifimode == WIFI_OFF) {
delay(100);
#if defined(ESP32)
esp_wifi_set_ps(WIFI_PS_MAX_MODEM);
#endif
#ifdef ESP8266
WiFi.forceSleepBegin();
#endif // ifdef ESP8266
delay(1);
} else {
// Only set power mode when AP is not enabled
// When AP is enabled, the sleep mode is already set to WIFI_NONE_SLEEP
if (!WifiIsAP(wifimode)) {
if (Settings.WifiNoneSleep()) {
#ifdef ESP8266
WiFi.setSleepMode(WIFI_NONE_SLEEP);
#endif
#ifdef ESP32
WiFi.setSleep(WIFI_PS_NONE);
#endif
} else if (Settings.EcoPowerMode()) {
// Allow light sleep during idle times
#ifdef ESP8266
WiFi.setSleepMode(WIFI_LIGHT_SLEEP);
#endif
#ifdef ESP32
// Maximum modem power saving.
// In this mode, interval to receive beacons is determined by the listen_interval parameter in wifi_sta_config_t
// FIXME TD-er: Must test if this is desired behavior in ESP32.
WiFi.setSleep(WIFI_PS_MAX_MODEM);
#endif
} else {
// Default
#ifdef ESP8266
WiFi.setSleepMode(WIFI_MODEM_SLEEP);
#endif
#ifdef ESP32
// Minimum modem power saving.
// In this mode, station wakes up to receive beacon every DTIM period
WiFi.setSleep(WIFI_PS_MIN_MODEM);
#endif
}
}
SetWiFiTXpower();
if (WifiIsSTA(wifimode)) {
if (!WiFi.getAutoConnect()) {
WiFi.setAutoConnect(true);
}
}
delay(100); // Must allow for some time to init.
}
const bool new_mode_AP_enabled = WifiIsAP(wifimode);
if (WifiIsAP(cur_mode) && !new_mode_AP_enabled) {
eventQueue.add(F("WiFi#APmodeDisabled"));
}
if (WifiIsAP(cur_mode) != new_mode_AP_enabled) {
// Mode has changed
setAPinternal(new_mode_AP_enabled);
}
#ifdef FEATURE_MDNS
#ifdef ESP8266
// notifyAPChange() is not present in the ESP32 MDNSResponder
MDNS.notifyAPChange();
#endif
#endif
}
bool WifiIsAP(WiFiMode_t wifimode)
{
#if defined(ESP32)
return (wifimode == WIFI_MODE_AP) || (wifimode == WIFI_MODE_APSTA);