CYD Desk Buddy! with DHT11

// DeskBuddy for ESP32-2432S028R (Cheap Yellow Display), landscape
#include <Arduino.h>
#include <Arduino_GFX_Library.h>
#include <XPT2046_Touchscreen.h>
#include <ArduinoJson.h>
#include <HTTPClient.h>
#include <WiFiClientSecure.h>
#include <WiFi.h>
#include <WebServer.h>
#include <Preferences.h>
#include <time.h>
#include <esp_sntp.h>
#include <math.h>
#include "secrets.h"

enum Page { FACE, CLOCK, WEATHER, FORECAST, SUN, MOON, INDOOR, SETUP, CONFIRM };

// Global state variables needed before function definitions
Page page = FACE;
bool dhtOK = false;

// Forward declarations
int dashboardPageCount();
bool isDashboardPage();

bool readDHT11();
void drawDht();

void centered(const String &s,int y,uint8_t n,uint16_t c);
void title(const String &s);
void footer();
String unitTemp();
String unitWind();
String format12Hour(const String &time24);
void applyTime();
void load();
void save();
String selected(const String &v,const String &wanted);
String form();
void setTimeZone(const String &choice);
void beginStation();
void startPortal();
bool getWeather();
void drawFace();
void drawClock();
void drawWeather();
void drawForecast();
void drawWeatherIcon(int x, int y, int code);
void drawSun();
void drawMoon();
void drawSetup();
void drawConfirm();
void render();
void readTouch();

int dashboardPageCount(){ return dhtOK ? 7 : 6; }
bool isDashboardPage(){ return (int)page >= (int)FACE && (int)page < dashboardPageCount(); }

constexpr int MY_TFT_CS=15, MY_TFT_DC=2, MY_TFT_SCLK=14, MY_TFT_MOSI=13, MY_TFT_MISO=12, MY_TFT_BL=21;
constexpr int TOUCH_CS=33, TOUCH_IRQ=36, TOUCH_SCK=25, TOUCH_MOSI=32, TOUCH_MISO=39;
constexpr int DHT_PIN=27, W=320, H=240;
constexpr uint16_t BG=0x0000, FG=0xFFFF, DIM=0x7BEF, CYAN=0x07FF;
Arduino_DataBus *bus=new Arduino_HWSPI(MY_TFT_DC,MY_TFT_CS,MY_TFT_SCLK,MY_TFT_MOSI,MY_TFT_MISO);
Arduino_GFX *gfx=new Arduino_ILI9341(bus,GFX_NOT_DEFINED,1);
SPIClass touchSPI(VSPI); XPT2046_Touchscreen touch(TOUCH_CS,TOUCH_IRQ);
WebServer web(80); Preferences store;

String ssid, pass, city, tzRule="CST6CDT,M3.2.0/2,M11.1.0/2", tzLabel="Central", units="imperial", weatherLabel="Waiting";
float lat=DESKBUDDY_DEFAULT_LAT, lon=DESKBUDDY_DEFAULT_LON, temperature=NAN;
float indoorTemperature=NAN, indoorHumidity=NAN;
String dayName[4], dayText[4]; float dayHigh[4], dayLow[4];
String sunriseTime="--:--", sunsetTime="--:--";
bool portal=false, webStarted=false, weatherOK=false, blink=false, dirty=true, wasConnected=false, timeSynced=false, reconnectPending=false; int renderedPage=-1;
String networkStatus="Starting Wi-Fi";
uint32_t lastWeather=0, lastWeatherAttempt=0, lastTimeAttempt=0, lastWiFiAttempt=0, wifiConnectStarted=0, reconnectAfter=0, lastBlink=0, lastPageCycle=0, lastDhtRead=0;

void centered(const String &s,int y,uint8_t n=1,uint16_t c=FG){gfx->setTextSize(n);gfx->setTextColor(c);gfx->setCursor((W-(int)s.length()*6*n)/2,y);gfx->print(s);}
void title(const String &s){gfx->fillScreen(BG);gfx->drawFastHLine(0,25,W,DIM);gfx->setTextSize(1);gfx->setTextColor(CYAN);gfx->setCursor(9,8);gfx->print(s);}
void footer(){
  gfx->setTextSize(1); gfx->setTextColor(DIM); gfx->setCursor(8,226); gfx->print("Swipe pages");
  const int gx=298,gy=220; gfx->drawCircle(gx,gy,9,CYAN); gfx->drawCircle(gx,gy,3,CYAN);
  for(int i=0;i<8;i++){float a=i*PI/4;gfx->drawLine(gx+(int)(10*cos(a)),gy+(int)(10*sin(a)),gx+(int)(13*cos(a)),gy+(int)(13*sin(a)),CYAN);}
}
String unitTemp(){return units=="metric"?"C":"F";}
String unitWind(){return units=="metric"?"km/h":"mph";}
String format12Hour(const String &time24){
  if(time24.length()!=5 || time24.charAt(2)!=':') return "--:--";
  int hour=time24.substring(0,2).toInt();
  int minute=time24.substring(3,5).toInt();
  if(hour<0 || hour>23 || minute<0 || minute>59) return "--:--";
  const char *suffix=hour>=12?"PM":"AM";
  int hour12=hour%12;
  if(hour12==0) hour12=12;
  char out[12];
  snprintf(out,sizeof(out),"%d:%02d %s",hour12,minute,suffix);
  return String(out);
}
void applyTime(){
  configTzTime(tzRule.c_str(), "time.cloudflare.com", "time.google.com", "pool.ntp.org");
  sntp_set_sync_interval(300000UL);
  lastTimeAttempt=millis();
}
void load(){
  store.begin("deskbuddy",false); ssid=store.getString("ssid",DESKBUDDY_WIFI_SSID); pass=store.getString("pass",DESKBUDDY_WIFI_PASSWORD);
  city=store.getString("city",DESKBUDDY_DEFAULT_CITY); lat=store.getFloat("lat",DESKBUDDY_DEFAULT_LAT); lon=store.getFloat("lon",DESKBUDDY_DEFAULT_LON);
  tzRule=store.getString("tz",tzRule); tzLabel=store.getString("tzlabel",tzLabel); units=store.getString("units",units);

  if(store.getUInt("weatherLocVer",0) < 2){
    city="Bella Vista, AR";
    lat=36.4637f;
    lon=-94.2344f;
    store.putString("city",city);
    store.putFloat("lat",lat);
    store.putFloat("lon",lon);
    store.putUInt("weatherLocVer",2);
    weatherOK=false;
    lastWeather=0;
    lastWeatherAttempt=0;
  }
}
void save(){store.putString("ssid",ssid);store.putString("pass",pass);store.putString("city",city);store.putFloat("lat",lat);store.putFloat("lon",lon);store.putString("tz",tzRule);store.putString("tzlabel",tzLabel);store.putString("units",units);}
String selected(const String &v,const String &wanted){return v==wanted?" selected":"";}
String form(){
  String h="<!doctype html><meta name=viewport content='width=device-width,initial-scale=1'><style>body{font-family:sans-serif;background:#101418;color:#eee;max-width:520px;margin:2em auto;padding:1em}input,select{width:100%;padding:.7em;box-sizing:border-box;margin:.35em 0}button{padding:.8em;background:#00bcd4;border:0;font-weight:bold}small{color:#bbb}</style><h1>DeskBuddy Setup Center</h1><p>Settings are stored on DeskBuddy.</p><form action=/save>Wi-Fi name<input name=ssid value='"+ssid+"'>Wi-Fi password <small>(leave blank to keep current password)</small><input type=password name=pass>City label<input name=city value='"+city+"'>Latitude<input name=lat value='"+String(lat,4)+"'>Longitude<input name=lon value='"+String(lon,4)+"'>Time zone<select name=tz>";
  h+="<option value=central"+selected(tzLabel,"Central")+">US Central (DST automatic)</option><option value=eastern"+selected(tzLabel,"Eastern")+">US Eastern (DST automatic)</option><option value=mountain"+selected(tzLabel,"Mountain")+">US Mountain (DST automatic)</option><option value=pacific"+selected(tzLabel,"Pacific")+">US Pacific (DST automatic)</option><option value=utc"+selected(tzLabel,"UTC")+">UTC</option></select>Units<select name=units><option value=imperial"+selected(units,"imperial")+">Imperial (F, mph)</option><option value=metric"+selected(units,"metric")+">Metric (C, km/h)</option></select><button>Save settings</button></form>";
  return h;
}
void setTimeZone(const String &choice){
  if(choice=="eastern"){tzLabel="Eastern";tzRule="EST5EDT,M3.2.0/2,M11.1.0/2";}
  else if(choice=="mountain"){tzLabel="Mountain";tzRule="MST7MDT,M3.2.0/2,M11.1.0/2";}
  else if(choice=="pacific"){tzLabel="Pacific";tzRule="PST8PDT,M3.2.0/2,M11.1.0/2";}
  else if(choice=="utc"){tzLabel="UTC";tzRule="UTC0";}
  else {tzLabel="Central";tzRule="CST6CDT,M3.2.0/2,M11.1.0/2";}
}
void beginStation(){
  if(ssid.isEmpty()){networkStatus="No Wi-Fi configured"; return;}
  WiFi.mode(WIFI_STA);
  WiFi.disconnect(false, false);
  delay(100);
  Serial.printf("Wi-Fi: joining '%s'\n", ssid.c_str());
  networkStatus="Connecting to Wi-Fi";
  WiFi.begin(ssid.c_str(),pass.c_str());
  lastWiFiAttempt=millis();
  if(wifiConnectStarted==0) wifiConnectStarted=lastWiFiAttempt;
}
void startPortal(){
  reconnectPending=false;
  portal=true;
  WiFi.disconnect(true, false);
  WiFi.softAPdisconnect(true);
  WiFi.mode(WIFI_AP);
  delay(100);
  WiFi.softAP("DeskBuddy-Setup","deskbuddy");
  networkStatus="Setup Wi-Fi ready: 192.168.4.1";
  wifiConnectStarted=0;
  page=SETUP;
  if(!webStarted){
    web.on("/",[](){web.send(200,"text/html",form());});
    web.on("/save",[](){
      ssid=web.arg("ssid"); String newPass=web.arg("pass"); if(!newPass.isEmpty())pass=newPass;
      city=web.arg("city"); lat=web.arg("lat").toFloat(); lon=web.arg("lon").toFloat(); units=web.arg("units")=="metric"?"metric":"imperial";
      store.putUInt("weatherLocVer",2);
      setTimeZone(web.arg("tz")); save(); weatherOK=false; lastWeather=0; lastWeatherAttempt=0; applyTime(); page=CONFIRM; dirty=true;
      web.send(200,"text/html","<h1>Saved</h1><p>DeskBuddy will reconnect in a moment. This setup Wi-Fi will turn off after it joins your saved network. Return to the gear screen for its local Wi-Fi address.</p>");
      reconnectPending=true; reconnectAfter=millis()+1500;
    });
    web.begin();
    webStarted=true;
  }
  dirty=true;
}
bool getWeather(){
  if(WiFi.status()!=WL_CONNECTED)return false;
  String tempUnit=units=="metric"?"celsius":"fahrenheit", windUnit=units=="metric"?"kmh":"mph";
  String u="https://api.open-meteo.com/v1/forecast?latitude="+String(lat,4)+"&longitude="+String(lon,4)+"&current=temperature_2m,weather_code&daily=weather_code,temperature_2m_max,temperature_2m_min,sunrise,sunset&temperature_unit="+tempUnit+"&wind_speed_unit="+windUnit+"&timezone=auto&forecast_days=4";
  WiFiClientSecure client;
  client.setInsecure();
  HTTPClient h;
  h.setConnectTimeout(10000);
  h.setTimeout(15000);
  h.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
  Serial.println("Weather: requesting Open-Meteo");
  if(!h.begin(client,u)){networkStatus="Weather connection failed"; Serial.println("Weather: client begin failed"); return false;}
  int status=h.GET();
  if(status!=HTTP_CODE_OK){networkStatus="Weather HTTP error "+String(status); Serial.printf("Weather HTTP status: %d\n",status);h.end();return false;}
  JsonDocument d;
  String payload=h.getString();
  bool ok=!deserializeJson(d,payload);
  h.end();
  if(!ok){networkStatus="Weather data parse failed"; Serial.println("Weather JSON parse failed");return false;}
  temperature=d["current"]["temperature_2m"].as<float>(); int code=d["current"]["weather_code"].as<int>(); weatherLabel=code==0?"Clear":code<=3?"Cloudy":code<=67?"Rain / fog":code<=77?"Snow":"Showers";
  JsonArray times=d["daily"]["time"].as<JsonArray>(), highs=d["daily"]["temperature_2m_max"].as<JsonArray>(), lows=d["daily"]["temperature_2m_min"].as<JsonArray>(), codes=d["daily"]["weather_code"].as<JsonArray>();
  for(int i=0;i<4;i++){
    struct tm dayTm;
    time_t base=time(nullptr) + (time_t)i*86400;
    localtime_r(&base,&dayTm);
    static const char *weekdays[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
    dayName[i]=i==0?"Today":String(weekdays[dayTm.tm_wday]);
    dayHigh[i]=highs[i]|NAN;dayLow[i]=lows[i]|NAN;int c=codes[i]|-1;dayText[i]=c==0?"Clear":c<=3?"Cloud":c<=67?"Rain":c<=77?"Snow":"Show";
  }
  String rise=d["daily"]["sunrise"][0] | "";
  String set=d["daily"]["sunset"][0] | "";
  sunriseTime=rise.length()>=16 ? format12Hour(rise.substring(11,16)) : "--:--";
  sunsetTime=set.length()>=16 ? format12Hour(set.substring(11,16)) : "--:--";
  weatherOK=true;
  networkStatus="Weather updated";
  Serial.printf("Weather: updated %.1f %s at %.4f, %.4f\n", temperature, unitTemp().c_str(), lat, lon);
  lastWeather=millis();
  dirty=true;
  return true;
}
void drawFace(){title("DESKBUDDY / FACE");gfx->drawRoundRect(37,43,246,154,22,DIM);if(blink){gfx->drawFastHLine(76,106,60,FG);gfx->drawFastHLine(185,106,60,FG);}else{gfx->fillRoundRect(67,72,74,68,26,FG);gfx->fillRoundRect(179,72,74,68,26,FG);gfx->fillCircle(104,106,13,BG);gfx->fillCircle(216,106,13,BG);}gfx->drawCircle(160,157,24,FG);gfx->fillRect(136,139,48,18,BG);if(WiFi.status()!=WL_CONNECTED)centered(networkStatus,201,1,DIM);else if(!timeSynced)centered("Connected - syncing clock...",201,1,CYAN);else if(!weatherOK)centered(networkStatus,201,1,CYAN);else centered("DeskBuddy ready",201,1,DIM);footer();}
void drawClock(){title("CLOCK / DATE");struct tm t;if(getLocalTime(&t,10)){char a[16],b[32];strftime(a,sizeof(a),"%I:%M %p",&t);strftime(b,sizeof(b),"%A, %d %b %Y",&t);centered(a,66,5);centered(b,159,2,CYAN);centered(tzLabel+" time",195,1,DIM);}else if(WiFi.status()==WL_CONNECTED){centered("Connected to Wi-Fi",88,2,CYAN);centered("Syncing time from network...",126,2);centered("Please wait",164,1,DIM);}else{centered(networkStatus,98,2);centered("Configure Wi-Fi with the gear",136,1,DIM);}footer();}
void drawWeather(){title("OPEN-METEO / "+city);if(weatherOK){centered(String(temperature,1)+" "+unitTemp(),65,7);centered(weatherLabel,151,3,CYAN);centered("Location: "+city,194,1,DIM);}else centered(WiFi.status()==WL_CONNECTED?"Updating weather...":"Wi-Fi not connected",104,2);footer();}
void drawWeatherIcon(int x,int y,int code){
  if(code==0){
    gfx->drawCircle(x,y,11,CYAN);
    for(int i=0;i<8;i++){float a=i*PI/4;gfx->drawLine(x+(int)(14*cos(a)),y+(int)(14*sin(a)),x+(int)(19*cos(a)),y+(int)(19*sin(a)),CYAN);}
  }else if(code<=3){
    gfx->fillCircle(x-7,y+3,7,FG);gfx->fillCircle(x+2,y-2,10,FG);gfx->fillCircle(x+12,y+4,6,FG);gfx->fillRect(x-13,y+4,31,7,FG);
  }else if(code<=77){
    gfx->fillCircle(x-7,y,7,FG);gfx->fillCircle(x+2,y-5,10,FG);gfx->fillCircle(x+12,y+1,6,FG);gfx->fillRect(x-13,y+1,31,7,FG);
    gfx->drawLine(x-8,y+13,x-11,y+19,CYAN);gfx->drawLine(x+2,y+13,x-1,y+19,CYAN);gfx->drawLine(x+11,y+13,x+8,y+19,CYAN);
  }else{
    gfx->fillCircle(x-7,y,7,FG);gfx->fillCircle(x+2,y-5,10,FG);gfx->fillCircle(x+12,y+1,6,FG);gfx->fillRect(x-13,y+1,31,7,FG);
    for(int i=-8;i<=10;i+=9){gfx->drawLine(x+i-3,y+14,x+i+3,y+20,CYAN);gfx->drawLine(x+i+3,y+14,x+i-3,y+20,CYAN);}
  }
}
void drawForecast(){
  title("4 DAY FORECAST / "+city);
  if(!weatherOK){centered("Weather data is updating...",108,2);footer();return;}
  for(int i=0;i<4;i++){
    int x=4+i*79, c=x+36;
    gfx->drawRoundRect(x,36,75,171,5,DIM);
    gfx->setTextSize(1);gfx->setTextColor(CYAN);gfx->setCursor(x+8,43);gfx->print(dayName[i]);
    int code=dayText[i]=="Clear"?0:dayText[i]=="Cloud"?2:dayText[i]=="Rain"?61:dayText[i]=="Snow"?71:80;
    drawWeatherIcon(c,76,code);
    gfx->setTextSize(1);gfx->setTextColor(FG);gfx->setCursor(x+11,105);gfx->print(dayText[i]);
    gfx->setTextSize(2);gfx->setTextColor(FG);gfx->setCursor(x+11,124);gfx->print(String(dayHigh[i],0));
    gfx->setTextSize(1);gfx->print(" "+unitTemp());
    gfx->setTextSize(2);gfx->setTextColor(DIM);gfx->setCursor(x+11,148);gfx->print(String(dayLow[i],0));
    gfx->setTextSize(1);gfx->print(" "+unitTemp());
  }
  centered("HIGH / LOW",214,1,DIM);footer();
}
void drawSun(){
  title("SUNRISE / SUNSET / "+city);
  if(!weatherOK){
    centered("Weather data is updating...",104,2,CYAN);
    footer();
    return;
  }
  gfx->drawCircle(80,91,24,CYAN);
  for(int i=0;i<8;i++){float a=i*PI/4;gfx->drawLine(80+(int)(29*cos(a)),91+(int)(29*sin(a)),80+(int)(37*cos(a)),91+(int)(37*sin(a)),CYAN);}
  gfx->drawFastHLine(38,126,84,DIM);
  gfx->setTextSize(2); gfx->setTextColor(CYAN); gfx->setCursor(36,145); gfx->print("SUNRISE");
  gfx->setTextSize(3); gfx->setTextColor(FG); gfx->setCursor(18,171); gfx->print(sunriseTime);
  gfx->fillCircle(240,91,24,FG);
  gfx->fillCircle(250,82,24,BG);
  gfx->drawFastHLine(198,126,84,DIM);
  gfx->setTextSize(2); gfx->setTextColor(CYAN); gfx->setCursor(198,145); gfx->print("SUNSET");
  gfx->setTextSize(3); gfx->setTextColor(FG); gfx->setCursor(188,171); gfx->print(sunsetTime);
  centered("Today, local time",207,1,DIM);
  footer();
}
bool readDHT11(){
  uint8_t raw[5]={0,0,0,0,0};
  pinMode(DHT_PIN, OUTPUT); digitalWrite(DHT_PIN, LOW); delay(20);
  digitalWrite(DHT_PIN, HIGH); delayMicroseconds(40); pinMode(DHT_PIN, INPUT_PULLUP);
  auto waitLevel=[](int level, uint32_t timeout){ uint32_t start=micros(); while(digitalRead(DHT_PIN)==level){ if((uint32_t)(micros()-start)>timeout) return false; } return true; };
  if(!waitLevel(HIGH,120) || !waitLevel(LOW,120) || !waitLevel(HIGH,120)){ Serial.println("DHT11: no response"); return false; }
  for(int i=0;i<40;i++){
    if(!waitLevel(LOW,90)) return false;
    uint32_t highStart=micros();
    if(!waitLevel(HIGH,120)) return false;
    if((uint32_t)(micros()-highStart)>50) raw[i/8]|=(1<<(7-(i%8)));
  }
  if((uint8_t)(raw[0]+raw[1]+raw[2]+raw[3])!=raw[4]){ Serial.println("DHT11: checksum failed"); return false; }
  float humidity=raw[0], celsius=raw[2];
  bool changed=!dhtOK || roundf(humidity)!=roundf(indoorHumidity) || roundf(celsius)!=roundf(indoorTemperature);
  indoorHumidity=humidity; indoorTemperature=celsius; dhtOK=true;
  if(changed && page==INDOOR) dirty=true;
  return true;
}
void drawDht(){
  title("INDOOR / DHT11");
  if(!dhtOK){ centered("Reading indoor sensor...",88,2,CYAN); centered("Check DHT11 3.3V, GND, DATA",126,1,DIM); }
  else{
    float shown=indoorTemperature*9.0f/5.0f+32.0f;
    centered("TEMPERATURE",46,1,CYAN); centered(String(shown,0)+" F",65,5,FG); centered("HUMIDITY",145,1,CYAN); centered(String(indoorHumidity,0)+" % RH",162,4,FG); centered("DHT11 indoor sensor",205,1,DIM); }
  footer();
}
void drawMoon(){title("MOON PHASE");time_t n=time(nullptr);float phase=fmod((n/86400.0f-10957.0f)/29.530588f,1);if(phase<0)phase+=1;int sh=(int)((phase<.5?1:-1)*fabs(.5-phase)*220);gfx->fillCircle(160,112,60,FG);gfx->fillCircle(160+sh,112,60,BG);gfx->drawCircle(160,112,60,DIM);centered(String((int)(phase*29.53f))+" days into lunar cycle",192,2,CYAN);footer();}
void drawSetup(){title("SETUP CENTER");centered("DeskBuddy Setup",43,2,CYAN);if(WiFi.status()==WL_CONNECTED){centered("Wi-Fi connected",73,1,CYAN);centered("Open this address on Wi-Fi:",98,1);centered("http://"+WiFi.localIP().toString(),123,2,FG);centered("Any computer on this network can edit",153,1,DIM);}else{centered("Connect to DeskBuddy-Setup",83,2);centered("Password: deskbuddy",116,2,CYAN);centered("Then open 192.168.4.1",151,2,FG);}centered("Wi-Fi, location, time zone, units",188,1,DIM);footer();}
void drawConfirm(){title("SETTINGS SAVED");centered("Saved on DeskBuddy",62,3,CYAN);centered(city+" / "+tzLabel+" / "+units,111,1);centered("Return to gear for setup address",153,1);centered("Swipe to return",193,1,DIM);footer();}
void render(){switch(page){case FACE:drawFace();break;case CLOCK:drawClock();break;case WEATHER:drawWeather();break;case FORECAST:drawForecast();break;case SUN:drawSun();break;case MOON:drawMoon();break;case INDOOR:drawDht();break;case SETUP:drawSetup();break;default:drawConfirm();}}
void readTouch(){static bool down=false;static int sx,sy,lx,ly;if(touch.touched()){TS_Point p=touch.getPoint();int x=constrain(map(p.x,200,3800,0,W-1),0,W-1),y=constrain(map(p.y,200,3800,0,H-1),0,H-1);if(!down){down=true;sx=x;sy=y;}lx=x;ly=y;return;}if(!down)return;down=false;int dx=lx-sx,dy=ly-sy;if(abs(dx)<24&&abs(dy)<24&&lx>=276&&ly>=198){startPortal();page=SETUP;}else if(abs(dx)>55&&abs(dx)>abs(dy)){const int count=dashboardPageCount();if(isDashboardPage())page=(Page)(((int)page+(dx<0?1:count-1))%count);else page=FACE;}lastPageCycle=millis();dirty=true;}
void setup(){Serial.begin(115200);load();pinMode(MY_TFT_BL,OUTPUT);digitalWrite(MY_TFT_BL,HIGH);gfx->begin(40000000);gfx->invertDisplay(true);touchSPI.begin(TOUCH_SCK,TOUCH_MISO,TOUCH_MOSI,TOUCH_CS);touch.begin(touchSPI);touch.setRotation(1);pinMode(DHT_PIN, INPUT_PULLUP);applyTime();beginStation();}
void loop(){
  if(portal)web.handleClient();
  if(reconnectPending && (int32_t)(millis()-reconnectAfter)>=0){
    reconnectPending=false;
    portal=false;
    WiFi.softAPdisconnect(true);
    WiFi.mode(WIFI_STA);
    wifiConnectStarted=0;
    beginStation();
  }
  readTouch();
  if(millis()-lastDhtRead>=2500){lastDhtRead=millis(); readDHT11();}
  bool connected=WiFi.status()==WL_CONNECTED;
  if(!connected && !portal && !ssid.isEmpty() && millis()-lastWiFiAttempt>=20000){
    networkStatus="Retrying Wi-Fi";
    beginStation();
    dirty=true;
  }
  // With no saved network, immediately provide the recovery/setup access point.
  // With a saved network, provide it after a failed 45-second join attempt.
  if(!connected && !portal && (ssid.isEmpty() ||
      (wifiConnectStarted!=0 && millis()-wifiConnectStarted>=45000))){
    Serial.println(ssid.isEmpty() ? "No Wi-Fi configured; opening setup hotspot" :
                                  "Wi-Fi join timed out; opening setup hotspot");
    startPortal();
    dirty=true;
  }
  if(connected!=wasConnected){
    wasConnected=connected;
    if(connected) wifiConnectStarted=0;
    weatherOK=false;
    timeSynced=false;
    if(connected){
      WiFi.softAPdisconnect(true);
      WiFi.mode(WIFI_STA);
      networkStatus="Connected - syncing clock";
      Serial.print("Wi-Fi connected, IP: "); Serial.println(WiFi.localIP());
      applyTime();
      lastWeatherAttempt=0;
      lastPageCycle=millis();
    }
    if(!connected){networkStatus="Wi-Fi unavailable (retrying)"; Serial.printf("Wi-Fi status: %d\n", WiFi.status());}
    dirty=true;
  }
  if(connected){
    const bool newTimeSynced = time(nullptr) > 1700000000;
    if(newTimeSynced!=timeSynced){
      timeSynced=newTimeSynced;
      if(timeSynced){networkStatus="Clock updated"; Serial.println("NTP time: updated");}
      dirty=true;
    }
    if(!timeSynced && millis()-lastTimeAttempt>=30000){
      Serial.println("NTP: retrying initial sync");
      applyTime();
    }
    if((!weatherOK || millis()-lastWeather>=300000) && millis()-lastWeatherAttempt>30000){lastWeatherAttempt=millis();getWeather();}
  }
  if(connected && isDashboardPage() && millis()-lastPageCycle>=15000){
    page=(Page)(((int)page+1)%dashboardPageCount());
    lastPageCycle=millis();
    dirty=true;
  }
  if(millis()-lastBlink>2500){
    blink=true;
    lastBlink=millis();
    if(page==FACE && !dirty){
      gfx->fillRoundRect(67,72,74,68,26,FG);
      gfx->fillRoundRect(179,72,74,68,26,FG);
      gfx->drawFastHLine(76,106,60,FG);
      gfx->drawFastHLine(185,106,60,FG);
    }
  }
  if(blink&&millis()-lastBlink>130){
    blink=false;
    if(page==FACE && !dirty){
      gfx->fillRoundRect(67,72,74,68,26,FG);
      gfx->fillRoundRect(179,72,74,68,26,FG);
      gfx->fillCircle(104,106,13,BG);
      gfx->fillCircle(216,106,13,BG);
    }
  }
  if(dirty||renderedPage!=(int)page){render();renderedPage=(int)page;dirty=false;}
}