WLED/wled00/wled.cpp

#include "wled.h"
#include <Arduino.h>
#include "wled_led.h"
#include "wled_ir.h"
#include "wled_notify.h"
#include "wled_alexa.h"
#include "wled_overlay.h"
#include "wled_file.h"
#include "wled_button.h"
#include "wled_ntp.h"
#include "wled_usermod.h"
#include "wled_blynk.h"
#include "wled_hue.h"
#include "wled_mqtt.h"
#include "wled_eeprom.h"
#include "wled_server.h"
// Global Variable definitions
char versionString[] = "0.9.1";

//AP and OTA default passwords (for maximum change them!)
char apPass[65] = DEFAULT_AP_PASS;
char otaPass[33] = DEFAULT_OTA_PASS;

//Hardware CONFIG (only changeble HERE, not at runtime)
//LED strip pin, button pin and IR pin changeable in NpbWrapper.h!

byte auxDefaultState = 0;                       //0: input 1: high 2: low
byte auxTriggeredState = 0;                     //0: input 1: high 2: low
char ntpServerName[33] = "0.wled.pool.ntp.org"; //NTP server to use

//WiFi CONFIG (all these can be changed via web UI, no need to set them here)
char clientSSID[33] = CLIENT_SSID;
char clientPass[65] = CLIENT_PASS;
char cmDNS[33] = "x";                       //mDNS address (placeholder, will be replaced by wledXXXXXXXXXXXX.local)
char apSSID[33] = "";                       //AP off by default (unless setup)
byte apChannel = 1;                         //2.4GHz WiFi AP channel (1-13)
byte apHide = 0;                            //hidden AP SSID
byte apBehavior = AP_BEHAVIOR_BOOT_NO_CONN; //access point opens when no connection after boot by default
IPAddress staticIP(0, 0, 0, 0);             //static IP of ESP
IPAddress staticGateway(0, 0, 0, 0);        //gateway (router) IP
IPAddress staticSubnet(255, 255, 255, 0);   //most common subnet in home networks
bool noWifiSleep = false;                   //disabling modem sleep modes will increase heat output and power usage, but may help with connection issues

//LED CONFIG
uint16_t ledCount = 30;            //overcurrent prevented by ABL
bool useRGBW = false;              //SK6812 strips can contain an extra White channel
#define ABL_MILLIAMPS_DEFAULT 850; //auto lower brightness to stay close to milliampere limit
bool turnOnAtBoot = true;          //turn on LEDs at power-up
byte bootPreset = 0;               //save preset to load after power-up

byte col[]{255, 160, 0, 0}; //current RGB(W) primary color. col[] should be updated if you want to change the color.
byte colSec[]{0, 0, 0, 0};  //current RGB(W) secondary color
byte briS = 128;            //default brightness

byte nightlightTargetBri = 0; //brightness after nightlight is over
byte nightlightDelayMins = 60;
bool nightlightFade = true;       //if enabled, light will gradually dim towards the target bri. Otherwise, it will instantly set after delay over
bool nightlightColorFade = false; //if enabled, light will gradually fade color from primary to secondary color.
bool fadeTransition = true;       //enable crossfading color transition
uint16_t transitionDelay = 750;   //default crossfade duration in ms

bool skipFirstLed = false; //ignore first LED in strip (useful if you need the LED as signal repeater)
byte briMultiplier = 100;  //% of brightness to set (to limit power, if you set it to 50 and set bri to 255, actual brightness will be 127)

//User Interface CONFIG
char serverDescription[33] = "WLED"; //Name of module
bool syncToggleReceive = false;      //UIs which only have a single button for sync should toggle send+receive if this is true, only send otherwise

//Sync CONFIG
bool buttonEnabled = true;
byte irEnabled = 0; //Infrared receiver

uint16_t udpPort = 21324;    //WLED notifier default port
uint16_t udpRgbPort = 19446; //Hyperion port

bool receiveNotificationBrightness = true; //apply brightness from incoming notifications
bool receiveNotificationColor = true;      //apply color
bool receiveNotificationEffects = true;    //apply effects setup
bool notifyDirect = false;                 //send notification if change via UI or HTTP API
bool notifyButton = false;                 //send if updated by button or infrared remote
bool notifyAlexa = false;                  //send notification if updated via Alexa
bool notifyMacro = false;                  //send notification for macro
bool notifyHue = true;                     //send notification if Hue light changes
bool notifyTwice = false;                  //notifications use UDP: enable if devices don't sync reliably

bool alexaEnabled = true;               //enable device discovery by Amazon Echo
char alexaInvocationName[33] = "Light"; //speech control name of device. Choose something voice-to-text can understand

char blynkApiKey[36] = ""; //Auth token for Blynk server. If empty, no connection will be made

uint16_t realtimeTimeoutMs = 2500;      //ms timeout of realtime mode before returning to normal mode
int arlsOffset = 0;                     //realtime LED offset
bool receiveDirect = true;              //receive UDP realtime
bool arlsDisableGammaCorrection = true; //activate if gamma correction is handled by the source
bool arlsForceMaxBri = false;           //enable to force max brightness if source has very dark colors that would be black

#define E131_MAX_UNIVERSE_COUNT 9
uint16_t e131Universe = 1;                               //settings for E1.31 (sACN) protocol (only DMX_MODE_MULTIPLE_* can span over consequtive universes)
uint8_t DMXMode = DMX_MODE_MULTIPLE_RGB;                 //DMX mode (s.a.)
uint16_t DMXAddress = 1;                                 //DMX start address of fixture, a.k.a. first Channel [for E1.31 (sACN) protocol]
uint8_t DMXOldDimmer = 0;                                //only update brightness on change
uint8_t e131LastSequenceNumber[E131_MAX_UNIVERSE_COUNT]; //to detect packet loss
bool e131Multicast = false;                              //multicast or unicast
bool e131SkipOutOfSequence = false;                      //freeze instead of flickering

bool mqttEnabled = false;
char mqttDeviceTopic[33] = "";        //main MQTT topic (individual per device, default is wled/mac)
char mqttGroupTopic[33] = "wled/all"; //second MQTT topic (for example to group devices)
char mqttServer[33] = "";             //both domains and IPs should work (no SSL)
char mqttUser[41] = "";               //optional: username for MQTT auth
char mqttPass[41] = "";               //optional: password for MQTT auth
char mqttClientID[41] = "";           //override the client ID
uint16_t mqttPort = 1883;

bool huePollingEnabled = false;    //poll hue bridge for light state
uint16_t huePollIntervalMs = 2500; //low values (< 1sec) may cause lag but offer quicker response
char hueApiKey[47] = "api";        //key token will be obtained from bridge
byte huePollLightId = 1;           //ID of hue lamp to sync to. Find the ID in the hue app ("about" section)
IPAddress hueIP = (0, 0, 0, 0);    //IP address of the bridge
bool hueApplyOnOff = true;
bool hueApplyBri = true;
bool hueApplyColor = true;

//Time CONFIG
bool ntpEnabled = false;  //get internet time. Only required if you use clock overlays or time-activated macros
bool useAMPM = false;     //12h/24h clock format
byte currentTimezone = 0; //Timezone ID. Refer to timezones array in wled10_ntp.ino
int utcOffsetSecs = 0;    //Seconds to offset from UTC before timzone calculation

byte overlayDefault = 0;                        //0: no overlay 1: analog clock 2: single-digit clocl 3: cronixie
byte overlayMin = 0, overlayMax = ledCount - 1; //boundaries of overlay mode

byte analogClock12pixel = 0;          //The pixel in your strip where "midnight" would be
bool analogClockSecondsTrail = false; //Display seconds as trail of LEDs instead of a single pixel
bool analogClock5MinuteMarks = false; //Light pixels at every 5-minute position

char cronixieDisplay[7] = "HHMMSS"; //Cronixie Display mask. See wled13_cronixie.ino
bool cronixieBacklight = true;      //Allow digits to be back-illuminated

bool countdownMode = false;                  //Clock will count down towards date
byte countdownYear = 20, countdownMonth = 1; //Countdown target date, year is last two digits
byte countdownDay = 1, countdownHour = 0;
byte countdownMin = 0, countdownSec = 0;

byte macroBoot = 0; //macro loaded after startup
byte macroNl = 0;   //after nightlight delay over
byte macroCountdown = 0;
byte macroAlexaOn = 0, macroAlexaOff = 0;
byte macroButton = 0, macroLongPress = 0, macroDoublePress = 0;

//Security CONFIG
bool otaLock = false;    //prevents OTA firmware updates without password. ALWAYS enable if system exposed to any public networks
bool wifiLock = false;   //prevents access to WiFi settings when OTA lock is enabled
bool aOtaEnabled = true; //ArduinoOTA allows easy updates directly from the IDE. Careful, it does not auto-disable when OTA lock is on

uint16_t userVar0 = 0, userVar1 = 0;

#ifdef WLED_ENABLE_DMX
//dmx CONFIG
byte DMXChannels = 7; // number of channels per fixture
byte DMXFixtureMap[15] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
// assigns the different channels to different functions. See wled21_dmx.ino for more information.
uint16_t DMXGap = 10;   // gap between the fixtures. makes addressing easier because you don't have to memorize odd numbers when climbing up onto a rig.
uint16_t DMXStart = 10; // start address of the first fixture
#endif

//internal global variable declarations
//wifi
bool apActive = false;
bool forceReconnect = false;
uint32_t lastReconnectAttempt = 0;
bool interfacesInited = false;
bool wasConnected = false;

//color
byte colOld[]{0, 0, 0, 0}; //color before transition
byte colT[]{0, 0, 0, 0};   //color that is currently displayed on the LEDs
byte colIT[]{0, 0, 0, 0};  //color that was last sent to LEDs
byte colSecT[]{0, 0, 0, 0};
byte colSecOld[]{0, 0, 0, 0};
byte colSecIT[]{0, 0, 0, 0};

byte lastRandomIndex = 0; //used to save last random color so the new one is not the same

//transitions
bool transitionActive = false;
uint16_t transitionDelayDefault = transitionDelay;
uint16_t transitionDelayTemp = transitionDelay;
unsigned long transitionStartTime;
float tperLast = 0; //crossfade transition progress, 0.0f - 1.0f
bool jsonTransitionOnce = false;

//nightlight
bool nightlightActive = false;
bool nightlightActiveOld = false;
uint32_t nightlightDelayMs = 10;
uint8_t nightlightDelayMinsDefault = nightlightDelayMins;
unsigned long nightlightStartTime;
byte briNlT = 0;           //current nightlight brightness
byte colNlT[]{0, 0, 0, 0}; //current nightlight color

//brightness
unsigned long lastOnTime = 0;
bool offMode = !turnOnAtBoot;
byte bri = briS;
byte briOld = 0;
byte briT = 0;
byte briIT = 0;
byte briLast = 128;   //brightness before turned off. Used for toggle function
byte whiteLast = 128; //white channel before turned off. Used for toggle function

//button
bool buttonPressedBefore = false;
bool buttonLongPressed = false;
unsigned long buttonPressedTime = 0;
unsigned long buttonWaitTime = 0;

//notifications
bool notifyDirectDefault = notifyDirect;
bool receiveNotifications = true;
unsigned long notificationSentTime = 0;
byte notificationSentCallMode = NOTIFIER_CALL_MODE_INIT;
bool notificationTwoRequired = false;

//effects
byte effectCurrent = 0;
byte effectSpeed = 128;
byte effectIntensity = 128;
byte effectPalette = 0;

//network
bool udpConnected = false, udpRgbConnected = false;

//ui style
bool showWelcomePage = false;

//hue
byte hueError = HUE_ERROR_INACTIVE;
//uint16_t hueFailCount = 0;
float hueXLast = 0, hueYLast = 0;
uint16_t hueHueLast = 0, hueCtLast = 0;
byte hueSatLast = 0, hueBriLast = 0;
unsigned long hueLastRequestSent = 0;
bool hueAuthRequired = false;
bool hueReceived = false;
bool hueStoreAllowed = false, hueNewKey = false;

//overlays
byte overlayCurrent = overlayDefault;
byte overlaySpeed = 200;
unsigned long overlayRefreshMs = 200;
unsigned long overlayRefreshedTime;

//cronixie
byte dP[]{0, 0, 0, 0, 0, 0};
bool cronixieInit = false;

//countdown
unsigned long countdownTime = 1514764800L;
bool countdownOverTriggered = true;

//timer
byte lastTimerMinute = 0;
byte timerHours[] = {0, 0, 0, 0, 0, 0, 0, 0};
byte timerMinutes[] = {0, 0, 0, 0, 0, 0, 0, 0};
byte timerMacro[] = {0, 0, 0, 0, 0, 0, 0, 0};
byte timerWeekday[] = {255, 255, 255, 255, 255, 255, 255, 255}; //weekdays to activate on
//bit pattern of arr elem: 0b11111111: sun,sat,fri,thu,wed,tue,mon,validity

//blynk
bool blynkEnabled = false;

//preset cycling
bool presetCyclingEnabled = false;
byte presetCycleMin = 1, presetCycleMax = 5;
uint16_t presetCycleTime = 1250;
unsigned long presetCycledTime = 0;
byte presetCycCurr = presetCycleMin;
bool presetApplyBri = true;
bool saveCurrPresetCycConf = false;

//realtime
byte realtimeMode = REALTIME_MODE_INACTIVE;
IPAddress realtimeIP = (0, 0, 0, 0);
unsigned long realtimeTimeout = 0;

//mqtt
long lastMqttReconnectAttempt = 0;
long lastInterfaceUpdate = 0;
byte interfaceUpdateCallMode = NOTIFIER_CALL_MODE_INIT;
char mqttStatusTopic[40] = ""; //this must be global because of async handlers

#if AUXPIN >= 0
    //auxiliary debug pin
byte auxTime = 0;
unsigned long auxStartTime = 0;
bool auxActive = false, auxActiveBefore = false;
#endif

//alexa udp
String escapedMac;
#ifndef WLED_DISABLE_ALEXA
Espalexa espalexa;
EspalexaDevice *espalexaDevice;
#endif

//dns server
DNSServer dnsServer;

//network time
bool ntpConnected = false;
time_t local = 0;
unsigned long ntpLastSyncTime = 999000000L;
unsigned long ntpPacketSentTime = 999000000L;
IPAddress ntpServerIP;
uint16_t ntpLocalPort = 2390;
#define NTP_PACKET_SIZE 48

//maximum number of LEDs - MAX_LEDS is coming from the JSON response getting too big, MAX_LEDS_DMA will become a timing issue
#define MAX_LEDS 1500
#define MAX_LEDS_DMA 500

//string temp buffer (now stored in stack locally)
#define OMAX 2048
char *obuf;
uint16_t olen = 0;

//presets
uint16_t savedPresets = 0;
int8_t currentPreset = -1;
bool isPreset = false;

byte errorFlag = 0;

String messageHead, messageSub;
byte optionType;

bool doReboot = false; //flag to initiate reboot from async handlers
bool doPublishMqtt = false;

//server library objects
AsyncWebServer server(80);
AsyncClient *hueClient = NULL;
AsyncMqttClient *mqtt = NULL;

//function prototypes
void colorFromUint32(uint32_t, bool = false);
void serveMessage(AsyncWebServerRequest *, uint16_t, String, String, byte);
void handleE131Packet(e131_packet_t *, IPAddress);
void arlsLock(uint32_t, byte);
void handleOverlayDraw();

//udp interface objects
WiFiUDP notifierUdp, rgbUdp;
WiFiUDP ntpUdp;
ESPAsyncE131 e131(handleE131Packet);
bool e131NewData = false;

//led fx library object
WS2812FX strip = WS2812FX();

#define WLED_CONNECTED (WiFi.status() == WL_CONNECTED)
#define WLED_WIFI_CONFIGURED (strlen(clientSSID) >= 1 && strcmp(clientSSID, DEFAULT_CLIENT_SSID) != 0)

//debug macros
#ifdef WLED_DEBUG
#define DEBUG_PRINT(x) Serial.print(x)
#define DEBUG_PRINTLN(x) Serial.println(x)
#define DEBUG_PRINTF(x) Serial.printf(x)
unsigned long debugTime = 0;
int lastWifiState = 3;
unsigned long wifiStateChangedTime = 0;
int loops = 0;
#else
#define DEBUG_PRINT(x)
#define DEBUG_PRINTLN(x)
#define DEBUG_PRINTF(x)
#endif



WLED::WLED() {

}

//turns all LEDs off and restarts ESP
void WLED::reset()
{
    briT = 0;
    long dly = millis();
    while (millis() - dly < 250)
    {
        yield(); //enough time to send response to client
    }
    setAllLeds();
    DEBUG_PRINTLN("MODULE RESET");
    ESP.restart();
}

bool oappendi(int i)
{
    char s[11];
    sprintf(s, "%ld", i);
    return oappend(s);
}

bool oappend(const char *txt)
{
    uint16_t len = strlen(txt);
    if (olen + len >= OMAX)
        return false; //buffer full
    strcpy(obuf + olen, txt);
    olen += len;
    return true;
}

void WLED::loop()
{
    handleIR(); //2nd call to function needed for ESP32 to return valid results -- should be good for ESP8266, too
    handleConnection();
    handleSerial();
    handleNotifications();
    handleTransitions();
#ifdef WLED_ENABLE_DMX
    handleDMX();
#endif
    userLoop();

    yield();
    handleIO();
    handleIR();
    handleNetworkTime();
    handleAlexa();

    handleOverlays();
    yield();
#ifdef WLED_USE_ANALOG_LEDS
    strip.setRgbwPwm();
#endif

    if (doReboot)
        reset();

    if (!realtimeMode) //block stuff if WARLS/Adalight is enabled
    {
        if (apActive)
            dnsServer.processNextRequest();
#ifndef WLED_DISABLE_OTA
        if (WLED_CONNECTED && aOtaEnabled)
            ArduinoOTA.handle();
#endif
        handleNightlight();
        yield();

        handleHue();
        handleBlynk();

        yield();
        if (!offMode)
            strip.service();
    }
    yield();
#ifdef ESP8266
    MDNS.update();
#endif
    if (millis() - lastMqttReconnectAttempt > 30000)
        initMqtt();

//DEBUG serial logging
#ifdef WLED_DEBUG
    if (millis() - debugTime > 9999)
    {
        DEBUG_PRINTLN("---DEBUG INFO---");
        DEBUG_PRINT("Runtime: ");
        DEBUG_PRINTLN(millis());
        DEBUG_PRINT("Unix time: ");
        DEBUG_PRINTLN(now());
        DEBUG_PRINT("Free heap: ");
        DEBUG_PRINTLN(ESP.getFreeHeap());
        DEBUG_PRINT("Wifi state: ");
        DEBUG_PRINTLN(WiFi.status());
        if (WiFi.status() != lastWifiState)
        {
            wifiStateChangedTime = millis();
        }
        lastWifiState = WiFi.status();
        DEBUG_PRINT("State time: ");
        DEBUG_PRINTLN(wifiStateChangedTime);
        DEBUG_PRINT("NTP last sync: ");
        DEBUG_PRINTLN(ntpLastSyncTime);
        DEBUG_PRINT("Client IP: ");
        DEBUG_PRINTLN(WiFi.localIP());
        DEBUG_PRINT("Loops/sec: ");
        DEBUG_PRINTLN(loops / 10);
        loops = 0;
        debugTime = millis();
    }
    loops++;
#endif // WLED_DEBU
}

void WLED::wledInit()
{
    EEPROM.begin(EEPSIZE);
    ledCount = EEPROM.read(229) + ((EEPROM.read(398) << 8) & 0xFF00);
    if (ledCount > MAX_LEDS || ledCount == 0)
        ledCount = 30;

#ifdef ESP8266
#if LEDPIN == 3
    if (ledCount > MAX_LEDS_DMA)
        ledCount = MAX_LEDS_DMA; //DMA method uses too much ram
#endif
#endif
    Serial.begin(115200);
    Serial.setTimeout(50);
    DEBUG_PRINTLN();
    DEBUG_PRINT("---WLED ");
    DEBUG_PRINT(versionString);
    DEBUG_PRINT(" ");
    DEBUG_PRINT(VERSION);
    DEBUG_PRINTLN(" INIT---");
#ifdef ARDUINO_ARCH_ESP32
    DEBUG_PRINT("esp32 ");
    DEBUG_PRINTLN(ESP.getSdkVersion());
#else
    DEBUG_PRINT("esp8266 ");
    DEBUG_PRINTLN(ESP.getCoreVersion());
#endif
    int heapPreAlloc = ESP.getFreeHeap();
    DEBUG_PRINT("heap ");
    DEBUG_PRINTLN(ESP.getFreeHeap());

    strip.init(EEPROM.read(372), ledCount, EEPROM.read(2204)); //init LEDs quickly
    strip.setBrightness(0);

    DEBUG_PRINT("LEDs inited. heap usage ~");
    DEBUG_PRINTLN(heapPreAlloc - ESP.getFreeHeap());

#ifndef WLED_DISABLE_FILESYSTEM
#ifdef ARDUINO_ARCH_ESP32
    SPIFFS.begin(true);
#endif
    SPIFFS.begin();
#endif

    DEBUG_PRINTLN("Load EEPROM");
    loadSettingsFromEEPROM(true);
    beginStrip();
    userSetup();
    if (strcmp(clientSSID, DEFAULT_CLIENT_SSID) == 0)
        showWelcomePage = true;
    WiFi.persistent(false);

    if (macroBoot > 0)
        applyMacro(macroBoot);
    Serial.println("Ada");

    //generate module IDs
    escapedMac = WiFi.macAddress();
    escapedMac.replace(":", "");
    escapedMac.toLowerCase();
    if (strcmp(cmDNS, "x") == 0) //fill in unique mdns default
    {
        strcpy(cmDNS, "wled-");
        sprintf(cmDNS + 5, "%*s", 6, escapedMac.c_str() + 6);
    }
    if (mqttDeviceTopic[0] == 0)
    {
        strcpy(mqttDeviceTopic, "wled/");
        sprintf(mqttDeviceTopic + 5, "%*s", 6, escapedMac.c_str() + 6);
    }
    if (mqttClientID[0] == 0)
    {
        strcpy(mqttClientID, "WLED-");
        sprintf(mqttClientID + 5, "%*s", 6, escapedMac.c_str() + 6);
    }

    strip.service();

#ifndef WLED_DISABLE_OTA
    if (aOtaEnabled)
    {
        ArduinoOTA.onStart([]() {
#ifdef ESP8266
            wifi_set_sleep_type(NONE_SLEEP_T);
#endif
            DEBUG_PRINTLN("Start ArduinoOTA");
        });
        if (strlen(cmDNS) > 0)
            ArduinoOTA.setHostname(cmDNS);
    }
#endif
#ifdef WLED_ENABLE_DMX
    dmx.init(512); // initialize with bus length
#endif
    //HTTP server page init
    initServer();
}

void WLED::beginStrip()
{
    // Initialize NeoPixel Strip and button
    strip.setShowCallback(handleOverlayDraw);

#ifdef BTNPIN
    pinMode(BTNPIN, INPUT_PULLUP);
#endif

    if (bootPreset > 0)
        applyPreset(bootPreset, turnOnAtBoot);
    colorUpdated(NOTIFIER_CALL_MODE_INIT);

//init relay pin
#if RLYPIN >= 0
    pinMode(RLYPIN, OUTPUT);
#if RLYMDE
    digitalWrite(RLYPIN, bri);
#else
    digitalWrite(RLYPIN, !bri);
#endif
#endif

    //disable button if it is "pressed" unintentionally
#ifdef BTNPIN
    if (digitalRead(BTNPIN) == LOW)
        buttonEnabled = false;
#else
    buttonEnabled = false;
#endif
}

void WLED::initAP(bool resetAP)
{
    if (apBehavior == AP_BEHAVIOR_BUTTON_ONLY && !resetAP)
        return;

    if (!apSSID[0] || resetAP)
        strcpy(apSSID, "WLED-AP");
    if (resetAP)
        strcpy(apPass, DEFAULT_AP_PASS);
    DEBUG_PRINT("Opening access point ");
    DEBUG_PRINTLN(apSSID);
    WiFi.softAPConfig(IPAddress(4, 3, 2, 1), IPAddress(4, 3, 2, 1), IPAddress(255, 255, 255, 0));
    WiFi.softAP(apSSID, apPass, apChannel, apHide);

    if (!apActive) //start captive portal if AP active
    {
        DEBUG_PRINTLN("Init AP interfaces");
        server.begin();
        if (udpPort > 0 && udpPort != ntpLocalPort)
        {
            udpConnected = notifierUdp.begin(udpPort);
        }
        if (udpRgbPort > 0 && udpRgbPort != ntpLocalPort && udpRgbPort != udpPort)
        {
            udpRgbConnected = rgbUdp.begin(udpRgbPort);
        }

        dnsServer.setErrorReplyCode(DNSReplyCode::NoError);
        dnsServer.start(53, "*", WiFi.softAPIP());
    }
    apActive = true;
}

void WLED::initConnection()
{
    WiFi.disconnect(); //close old connections
#ifdef ESP8266
    WiFi.setPhyMode(WIFI_PHY_MODE_11N);
#endif

    if (staticIP[0] != 0 && staticGateway[0] != 0)
    {
        WiFi.config(staticIP, staticGateway, staticSubnet, IPAddress(8, 8, 8, 8));
    }
    else
    {
        WiFi.config(0U, 0U, 0U);
    }

    lastReconnectAttempt = millis();

    if (!WLED_WIFI_CONFIGURED)
    {
        DEBUG_PRINT("No connection configured. ");
        if (!apActive)
            initAP(); //instantly go to ap mode
        return;
    }
    else if (!apActive)
    {
        if (apBehavior == AP_BEHAVIOR_ALWAYS)
        {
            initAP();
        }
        else
        {
            DEBUG_PRINTLN("Access point disabled.");
            WiFi.softAPdisconnect(true);
        }
    }
    showWelcomePage = false;

    DEBUG_PRINT("Connecting to ");
    DEBUG_PRINT(clientSSID);
    DEBUG_PRINTLN("...");

#ifdef ESP8266
    WiFi.hostname(serverDescription);
#endif

    WiFi.begin(clientSSID, clientPass);

#ifdef ARDUINO_ARCH_ESP32
    WiFi.setSleep(!noWifiSleep);
    WiFi.setHostname(serverDescription);
#else
    wifi_set_sleep_type((noWifiSleep) ? NONE_SLEEP_T : MODEM_SLEEP_T);
#endif
}

void WLED::initInterfaces()
{
    DEBUG_PRINTLN("Init STA interfaces");

    if (hueIP[0] == 0)
    {
        hueIP[0] = WiFi.localIP()[0];
        hueIP[1] = WiFi.localIP()[1];
        hueIP[2] = WiFi.localIP()[2];
    }

    //init Alexa hue emulation
    if (alexaEnabled)
        alexaInit();

#ifndef WLED_DISABLE_OTA
    if (aOtaEnabled)
        ArduinoOTA.begin();
#endif

    strip.service();
    // Set up mDNS responder:
    if (strlen(cmDNS) > 0)
    {
        if (!aOtaEnabled)
            MDNS.begin(cmDNS);

        DEBUG_PRINTLN("mDNS started");
        MDNS.addService("http", "tcp", 80);
        MDNS.addService("wled", "tcp", 80);
        MDNS.addServiceTxt("wled", "tcp", "mac", escapedMac.c_str());
    }
    server.begin();

    if (udpPort > 0 && udpPort != ntpLocalPort)
    {
        udpConnected = notifierUdp.begin(udpPort);
        if (udpConnected && udpRgbPort != udpPort)
            udpRgbConnected = rgbUdp.begin(udpRgbPort);
    }
    if (ntpEnabled)
        ntpConnected = ntpUdp.begin(ntpLocalPort);

    initBlynk(blynkApiKey);
    e131.begin((e131Multicast) ? E131_MULTICAST : E131_UNICAST, e131Universe, E131_MAX_UNIVERSE_COUNT);
    reconnectHue();
    initMqtt();
    interfacesInited = true;
    wasConnected = true;
}

byte stacO = 0;
uint32_t lastHeap;
unsigned long heapTime = 0;

void WLED::handleConnection()
{
    if (millis() < 2000 && (!WLED_WIFI_CONFIGURED || apBehavior == AP_BEHAVIOR_ALWAYS))
        return;
    if (lastReconnectAttempt == 0)
        initConnection();

    //reconnect WiFi to clear stale allocations if heap gets too low
    if (millis() - heapTime > 5000)
    {
        uint32_t heap = ESP.getFreeHeap();
        if (heap < 9000 && lastHeap < 9000)
        {
            DEBUG_PRINT("Heap too low! ");
            DEBUG_PRINTLN(heap);
            forceReconnect = true;
        }
        lastHeap = heap;
        heapTime = millis();
    }

    byte stac = 0;
    if (apActive)
    {
#ifdef ESP8266
        stac = wifi_softap_get_station_num();
#else
        wifi_sta_list_t stationList;
        esp_wifi_ap_get_sta_list(&stationList);
        stac = stationList.num;
#endif
        if (stac != stacO)
        {
            stacO = stac;
            DEBUG_PRINT("Connected AP clients: ");
            DEBUG_PRINTLN(stac);
            if (!WLED_CONNECTED && WLED_WIFI_CONFIGURED)
            { //trying to connect, but not connected
                if (stac)
                    WiFi.disconnect(); //disable search so that AP can work
                else
                    initConnection(); //restart search
            }
        }
    }
    if (forceReconnect)
    {
        DEBUG_PRINTLN("Forcing reconnect.");
        initConnection();
        interfacesInited = false;
        forceReconnect = false;
        wasConnected = false;
        return;
    }
    if (!WLED_CONNECTED)
    {
        if (interfacesInited)
        {
            DEBUG_PRINTLN("Disconnected!");
            interfacesInited = false;
            initConnection();
        }
        if (millis() - lastReconnectAttempt > ((stac) ? 300000 : 20000) && WLED_WIFI_CONFIGURED)
            initConnection();
        if (!apActive && millis() - lastReconnectAttempt > 12000 && (!wasConnected || apBehavior == AP_BEHAVIOR_NO_CONN))
            initAP();
    }
    else if (!interfacesInited)
    { //newly connected
        DEBUG_PRINTLN("");
        DEBUG_PRINT("Connected! IP address: ");
        DEBUG_PRINTLN(WiFi.localIP());
        initInterfaces();
        userConnected();

        //shut down AP
        if (apBehavior != AP_BEHAVIOR_ALWAYS && apActive)
        {
            dnsServer.stop();
            WiFi.softAPdisconnect(true);
            apActive = false;
            DEBUG_PRINTLN("Access point disabled.");
        }
    }
}

//by https://github.com/tzapu/WiFiManager/blob/master/WiFiManager.cpp
int getSignalQuality(int rssi)
{
    int quality = 0;

    if (rssi <= -100)
    {
        quality = 0;
    }
    else if (rssi >= -50)
    {
        quality = 100;
    }
    else
    {
        quality = 2 * (rssi + 100);
    }
    return quality;
}