Orquidea AI - V 2.2

#include <Arduino.h>
#include <WiFi.h>
#include <ESPmDNS.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <ArduinoJson.h>
#include <DHT.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <LittleFS.h>
#include <ArduinoOTA.h>
#include <WiFiClientSecure.h>
#include <HTTPClient.h>
#include <time.h>

// Orquidea IA — Seeed Studio XIAO ESP32-S3
#define WIFI_SSID "Vodafone-42D2E7"
#define WIFI_PASS "UcyXUx8aFNg8dTcY"
#define DHT_PIN 8  // XIAO D9 (GPIO8): DHT22 DATA/S
#define MIST_EN_PIN 10 // GPIO10: Grove atomizador EN; LOW desliga, HIGH liga
#define WATER_SIG_PIN 1
#define WATER_PWR_PIN 2
#define OLED_SDA 5
#define OLED_SCL 6
#define LED_RED_PIN 7
#define FAN_PWM_PIN 3
#define FAN_TACH_PIN 9
#define FAN_PWM_HZ 25000
#define FAN_PWM_BITS 8
#define FAN_TACH_PULSES_PER_REV 2
#define FAN_TACH_SAMPLE_MS 5000UL
// A NF-A4x10 PWM está ligada com o fio verde TACH e pull-up externo de 10 kΩ
// para 3,3 V; assim o painel pode mostrar rotações reais e detetar paragem.
#define FAN_TACH_CONNECTED true
#define DHTTYPE DHT22
#define LOW_WATER 20.0f
#define CRITICAL_WATER 10.0f
#define READ_MS 5000UL
#define HISTORY_MS 600000UL


// Forward declarations

// Forward declarations
String telegramEncode(const String& value);

void updateClock();
void saveSettings();
void loadSettings();
void setMist(bool enabled);
void setFanSpeed(int percent);
void IRAM_ATTR onFanTach();
void updateFanRpm();
float readWater();
void saveHistory();
String daysJson();
String historyJson(const String& day);
void broadcast();
void readControl();
void drawMain();
void drawPrediction();
void drawStartup(const String& status);
void maintainWiFi();
void startMdns();
void evaluateTelegramAlerts();
void queueTelegram(const String& message);
void serviceTelegram();
void onWs(AsyncWebSocket*,AsyncWebSocketClient*,AwsEventType type,void*,uint8_t* data,size_t len);

DHT dht(DHT_PIN, DHTTYPE);
Adafruit_SSD1306 oled(128, 64, &Wire, -1);
AsyncWebServer server(80);
AsyncWebSocket ws("/ws");

float tempMin=20, tempMax=28, humMin=60, humMax=70;
float temperature=NAN, humidity=NAN, waterPct=0;
float previousHum=NAN, humTrend=0, previousTemp=NAN, tempTrend=0;
// Valor filtrado para controlo: o DHT22 varia em passos pequenos e não deve
// comutar o relé por uma única leitura de 0,1 %.
float controlHumidity=NAN, controlTemperature=NAN;
int rawEmpty=0, rawFull=3200;
bool mist=false, manual=false, manualMistOn=false, lowWater=false, predictionPage=false;
bool fanManual=false;
int fanSpeed=0, fanManualSpeed=0, fanRpm=0;
volatile uint32_t fanTachPulses=0;
uint32_t lastTachPulses=0;
bool fanFault=false;
unsigned long mistSeconds=0, mistStart=0, lastRead=0, lastHistory=0, lastPage=0, lastTachSample=0;
unsigned long lastMistAutoChange=0;
const unsigned long MIST_MIN_SWITCH_MS=120000UL; // evita ciclos rápidos do atomizador
unsigned long lastWiFiAttempt=0;
bool mdnsRunning=false;
const unsigned long WIFI_RETRY_MS=15000UL;

// Credenciais Telegram guardadas localmente em LittleFS e nunca devolvidas pela API Web.
String telegramToken="", telegramChatId="", telegramPending="", telegramStatus="Não configurado";
bool telegramBusy=false, criticalWaterAlertSent=false, fanAlertSent=false, humidityAlertSent=false, temperatureAlertSent=false, cleaningAlertSent=false;
unsigned long fanFaultSince=0, humidityOutSince=0, temperatureOutSince=0;
const unsigned long PERSISTENT_ALERT_MS=15UL*60UL*1000UL;
char dayKey[11]="", dateText[11]="--/--/----", timeText[9]="--:--:--";

void updateClock(){
  tm info;
  if(getLocalTime(&info)){
    strftime(dayKey,sizeof(dayKey),"%Y-%m-%d",&info);
    strftime(dateText,sizeof(dateText),"%d/%m/%Y",&info);
    strftime(timeText,sizeof(timeText),"%H:%M:%S",&info);
  }
}

// Reposição de rede independente do controlo ambiental. Nunca bloqueia o loop:
// se o router falhar, o humidificador, sensores e histórico continuam ativos.
void startMdns(){
  if(mdnsRunning || WiFi.status()!=WL_CONNECTED)return;
  if(MDNS.begin("orquidea-ia")){
    MDNS.addService("http","tcp",80);
    mdnsRunning=true;
    Serial.print("mDNS ativo em http://orquidea-ia.local — IP: ");
    Serial.println(WiFi.localIP());
  }
}
void maintainWiFi(){
  if(WiFi.status()==WL_CONNECTED){
    startMdns();
    return;
  }
  // mDNS perde a associação juntamente com o Wi-Fi; será criado de novo
  // quando a placa receber outro endereço IP.
  if(mdnsRunning){
    MDNS.end();
    mdnsRunning=false;
  }
  unsigned long now=millis();
  if(now-lastWiFiAttempt>=WIFI_RETRY_MS){
    lastWiFiAttempt=now;
    Serial.println("Wi-Fi desligado; a tentar reconectar...");
    WiFi.disconnect(false, false);
    WiFi.begin(WIFI_SSID,WIFI_PASS);
  }
}
void saveSettings(){
  JsonDocument doc;
  doc["rawEmpty"]=rawEmpty; doc["rawFull"]=rawFull;
  doc["tempMin"]=tempMin; doc["tempMax"]=tempMax;
  doc["humMin"]=humMin; doc["humMax"]=humMax;
  doc["mistSeconds"]=mistSeconds;
  doc["fanManual"]=fanManual; doc["fanManualSpeed"]=fanManualSpeed;
  doc["telegramToken"]=telegramToken; doc["telegramChatId"]=telegramChatId;
  File f=LittleFS.open("/settings.json","w");
  if(f){serializeJson(doc,f);f.close();}
}
void loadSettings(){
  File f=LittleFS.open("/settings.json","r");
  if(!f)return;
  JsonDocument doc;
  if(deserializeJson(doc,f)==DeserializationError::Ok){
    rawEmpty=doc["rawEmpty"]|0; rawFull=doc["rawFull"]|3200;
    tempMin=doc["tempMin"]|20.0f; tempMax=doc["tempMax"]|28.0f;
    humMin=doc["humMin"]|60.0f; humMax=doc["humMax"]|70.0f;
    mistSeconds=doc["mistSeconds"]|0UL;
    fanManual=doc["fanManual"]|false; fanManualSpeed=doc["fanManualSpeed"]|0;
    telegramToken=doc["telegramToken"]|""; telegramChatId=doc["telegramChatId"]|"";
  }
  f.close();
}
// Coloca a mensagem numa fila de uma posição. Assim os alertas não se repetem
// nem bloqueiam a leitura do sensor; o envio é tratado mais tarde no loop.
void queueTelegram(const String& message){
  if(telegramToken.length()<20 || telegramChatId.length()==0){
    telegramStatus="Configure o token e o Chat ID";
    return;
  }
  if(telegramPending.length()==0)telegramPending=message;
}
String telegramEncode(const String& value){
  const char* hex="0123456789ABCDEF"; String out;
  for(size_t i=0;i<value.length();i++){
    uint8_t c=(uint8_t)value[i];
    if((c>='a'&&c<='z')||(c>='A'&&c<='Z')||(c>='0'&&c<='9')||c=='-'||c=='_'||c=='.')out+=(char)c;
    else {out+='%';out+=hex[c>>4];out+=hex[c&15];}
  }
  return out;
}
void serviceTelegram(){
  if(telegramBusy || telegramPending.length()==0 || WiFi.status()!=WL_CONNECTED)return;
  telegramBusy=true;
  String message=telegramPending; telegramPending="";
  WiFiClientSecure client; client.setInsecure(); client.setTimeout(1500);
  HTTPClient http; http.setConnectTimeout(1500); http.setTimeout(1500);
  String url="https://api.telegram.org/bot"+telegramToken+"/sendMessage";
  bool started=http.begin(client,url);
  int result=-1;
  if(started){
    http.addHeader("Content-Type","application/x-www-form-urlencoded");
    result=http.POST("chat_id="+telegramEncode(telegramChatId)+"&text="+telegramEncode(message));
    http.end();
  }
  telegramStatus=result==200?"Último envio Telegram concluído":"Falha Telegram (verifique Wi-Fi, token e Chat ID)";
  telegramBusy=false;
  broadcast();
}
void evaluateTelegramAlerts(){
  unsigned long now=millis();
  if(waterPct<CRITICAL_WATER){
    if(!criticalWaterAlertSent){queueTelegram("Orquidea IA: nivel de agua criticamente baixo ("+String((int)waterPct)+"%). Nebulizador desligado por seguranca.");criticalWaterAlertSent=true;}
  }else criticalWaterAlertSent=false;
  if(fanFault){
    if(fanFaultSince==0)fanFaultSince=now;
    if(now-fanFaultSince>=PERSISTENT_ALERT_MS && !fanAlertSent){queueTelegram("Orquidea IA: falha persistente da ventoinha. Ha comando, mas nao foram detetados RPM durante 15 minutos.");fanAlertSent=true;}
  }else {fanFaultSince=0;fanAlertSent=false;}
  bool humOut=!isnan(humidity)&&(humidity<humMin || humidity>humMax);
  if(humOut){
    if(humidityOutSince==0)humidityOutSince=now;
    if(now-humidityOutSince>=PERSISTENT_ALERT_MS && !humidityAlertSent){queueTelegram("Orquidea IA: humidade fora dos limites durante 15 minutos ("+String(humidity,1)+"%, limites "+String(humMin,0)+"-"+String(humMax,0)+"%).");humidityAlertSent=true;}
  }else {humidityOutSince=0;humidityAlertSent=false;}
  bool tempOut=!isnan(temperature)&&(temperature<tempMin || temperature>tempMax);
  if(tempOut){
    if(temperatureOutSince==0)temperatureOutSince=now;
    if(now-temperatureOutSince>=PERSISTENT_ALERT_MS && !temperatureAlertSent){queueTelegram("Orquidea IA: temperatura fora dos limites durante 15 minutos ("+String(temperature,1)+" C, limites "+String(tempMin,0)+"-"+String(tempMax,0)+" C).");temperatureAlertSent=true;}
  }else {temperatureOutSince=0;temperatureAlertSent=false;}
  float hours=(mistSeconds+(mist?(millis()-mistStart)/1000UL:0))/3600.0f;
  if(hours>=100.0f && !cleaningAlertSent){queueTelegram("Orquidea IA: manutencao recomendada. O nebulizador atingiu 100 horas de funcionamento; limpe-o antes de continuar.");cleaningAlertSent=true;}
}
void setMist(bool enabled){
  if(enabled==mist)return;
  // O EN do Grove tem pull-down interno: LOW pára a névoa e HIGH ativa-a.
  digitalWrite(MIST_EN_PIN, enabled ? HIGH : LOW);
  if(enabled)mistStart=millis();
  else{mistSeconds+=(millis()-mistStart)/1000UL;saveSettings();}
  mist=enabled;
}
void setFanSpeed(int percent){
  percent=constrain(percent,0,100);
  if(percent==fanSpeed)return;
  // O 2N7000 inverte o sinal: GPIO alto puxa PWM a GND.
  uint32_t gateDuty=map(100-percent,0,100,0,(1<<FAN_PWM_BITS)-1);
  ledcWrite(FAN_PWM_PIN,gateDuty);
  fanSpeed=percent;
}
void IRAM_ATTR onFanTach(){
  fanTachPulses++;
}
void updateFanRpm(){
  // Sem uma ventoinha ligada, o pino TACH pode apanhar ruído e parecer que
  // existem rotações. Não apresenta RPM nem assinala avaria até a ligação ser
  // instalada e esta opção ser ativada.
  if(!FAN_TACH_CONNECTED){
    noInterrupts(); fanTachPulses=0; interrupts();
    lastTachPulses=0;
    fanRpm=0;
    fanFault=false;
    fanFaultSince=0;
    return;
  }
  unsigned long now=millis();
  if(now-lastTachSample<FAN_TACH_SAMPLE_MS)return;
  uint32_t pulses;
  noInterrupts(); pulses=fanTachPulses; interrupts();
  uint32_t newPulses=pulses-lastTachPulses;
  unsigned long elapsed=now-lastTachSample;
  fanRpm=(int)((newPulses*60000UL)/(FAN_TACH_PULSES_PER_REV*elapsed));
  fanFault=(fanSpeed>=30 && fanRpm<100);
  lastTachPulses=pulses;
  lastTachSample=now;
}
float readWater(){
  digitalWrite(WATER_PWR_PIN,HIGH);delay(10);
  int raw=analogRead(WATER_SIG_PIN);
  digitalWrite(WATER_PWR_PIN,LOW);
  if(rawFull<=rawEmpty)return 0;
  return constrain((raw-rawEmpty)*100.0f/(rawFull-rawEmpty),0.0f,100.0f);
}
void saveHistory(){
  updateClock();
  if(!dayKey[0]||isnan(temperature)||isnan(humidity))return;
  File f=LittleFS.open(String("/data/")+dayKey+".csv","a");
  if(f){f.printf("%s,%.1f,%.1f\n",timeText,temperature,humidity);f.close();}
}
String daysJson(){
  JsonDocument doc;JsonArray a=doc.to<JsonArray>();
  File dir=LittleFS.open("/data");
  if(dir&&dir.isDirectory())for(File f=dir.openNextFile();f;f=dir.openNextFile()){
    String n=f.name();
    if(n.endsWith(".csv")){
      int slash=n.lastIndexOf('/');
      a.add(n.substring(slash+1,n.length()-4)); // only YYYY-MM-DD, never the LittleFS /data/ path
    }
  }
  String out;serializeJson(doc,out);return out;
}
String historyJson(const String& day){
  JsonDocument doc;JsonArray labels=doc["labels"].to<JsonArray>();
  JsonArray temps=doc["temps"].to<JsonArray>();JsonArray hums=doc["hums"].to<JsonArray>();
  File f=LittleFS.open(String("/data/")+day+".csv","r");
  if(!f){doc["error"]="Sem dados";String out;serializeJson(doc,out);return out;}
  while(f.available()){
    String s=f.readStringUntil('\n');int a=s.indexOf(','),b=s.indexOf(',',a+1);
    if(a>0&&b>a){labels.add(s.substring(0,a));temps.add(s.substring(a+1,b).toFloat());hums.add(s.substring(b+1).toFloat());}
  }
  f.close();String out;serializeJson(doc,out);return out;
}
void broadcast(){
  updateClock();JsonDocument doc;
  doc["temp"]=isnan(temperature)?0:temperature;doc["hum"]=isnan(humidity)?0:humidity;
  doc["water"]=(int)waterPct;doc["mist"]=mist;doc["manual"]=manual;doc["manualMistOn"]=manualMistOn;doc["waterAlert"]=lowWater;
  doc["fanSpeed"]=fanSpeed;doc["fanManual"]=fanManual;doc["fanManualSpeed"]=fanManualSpeed;
  doc["fanRpm"]=fanRpm;doc["fanFault"]=fanFault;doc["fanTachConnected"]=FAN_TACH_CONNECTED;
  doc["tempMin"]=tempMin;doc["tempMax"]=tempMax;doc["humMin"]=humMin;doc["humMax"]=humMax;
  doc["trend"]=humTrend;doc["future"]=isnan(humidity)?0:humidity+humTrend*2.0f;
  doc["tempTrend"]=tempTrend;doc["tempFuture"]=isnan(temperature)?0:temperature+tempTrend*2.0f;
  doc["hours"]=(mistSeconds+(mist?(millis()-mistStart)/1000UL:0))/3600.0f;
  doc["cleaningDue"]=(doc["hours"].as<float>()>=100.0f);
  doc["rawEmpty"]=rawEmpty;doc["rawFull"]=rawFull;doc["ssid"]=WiFi.SSID();doc["ip"]=WiFi.localIP().toString();
  doc["telegramConfigured"]=(telegramToken.length()>=20 && telegramChatId.length()>0);doc["telegramStatus"]=telegramStatus;
  doc["date"]=dateText;doc["time"]=timeText;
  String out;serializeJson(doc,out);ws.textAll(out);
}
void readControl(){
  // The water sensor must remain independent of the DHT: a failed DHT read
  // must never freeze water indication or the low-water safety cut-off.
  waterPct=readWater();
  lowWater=waterPct<LOW_WATER;

  float h=dht.readHumidity();
  float t=dht.readTemperature();
  bool dhtValid=!isnan(h)&&!isnan(t);
  if(dhtValid){
    temperature=t;
    humidity=h;
    // Média exponencial: cada leitura nova contribui apenas 25 %. Isto reduz
    // o ruído normal do DHT22 sem ignorar uma alteração ambiental sustentada.
    if(isnan(controlHumidity)) controlHumidity=h;
    else controlHumidity+=0.25f*(h-controlHumidity);
    if(isnan(controlTemperature)) controlTemperature=t;
    else controlTemperature+=0.25f*(t-controlTemperature);

    // A tendência usa os valores filtrados e também é suavizada. Uma leitura
    // isolada de 0,1 % deixa de ser interpretada como uma mudança brusca.
    if(!isnan(previousHum)){
      float instantHumTrend=(controlHumidity-previousHum)*12.0f;
      humTrend=0.75f*humTrend+0.25f*instantHumTrend;
      humTrend=constrain(humTrend,-3.0f,3.0f);
    }
    if(!isnan(previousTemp)){
      float instantTempTrend=(controlTemperature-previousTemp)*12.0f;
      tempTrend=0.75f*tempTrend+0.25f*instantTempTrend;
      tempTrend=constrain(tempTrend,-3.0f,3.0f);
    }
    previousHum=controlHumidity;
    previousTemp=controlTemperature;
  }else{
    Serial.println("Falha na leitura do DHT22; nivel de agua continua ativo.");
  }

  // Never run the mist maker with critically low water. Humidity control only
  // runs after a valid DHT measurement, so NaN cannot cause a false decision.
  if(waterPct<CRITICAL_WATER){
    // A proteção de água tem sempre prioridade, inclusive no modo manual.
    setMist(false);
  }else if(manual){
    setMist(manualMistOn);
  }else if(dhtValid){
    // A previsão serve apenas para antecipar uma tendência estável. O valor
    // filtrado tem de estar realmente fora da zona normal antes de comutar.
    float predicted=controlHumidity+humTrend*2.0f;
    bool wantsMist=!mist && controlHumidity<humMin && predicted<humMin+0.2f;
    bool wantsStop=mist && (controlHumidity>=humMax || predicted>=humMax+0.6f);
    unsigned long now=millis();
    // Depois de uma mudança automática, mantém o relé nesse estado pelo
    // menos dois minutos. A proteção de água acima continua imediata.
    if((wantsMist || wantsStop) &&
       (lastMistAutoChange==0 || now-lastMistAutoChange>=MIST_MIN_SWITCH_MS)){
      setMist(wantsMist);
      lastMistAutoChange=now;
    }
  }
  if(dhtValid){
    int automaticFan=0;
    if(h>=humMax || t>=tempMax){
      automaticFan=30;
      if(h>=humMax+2 || t>=tempMax+2) automaticFan=60;
      if(h>=humMax+5 || t>=tempMax+5) automaticFan=100;
    }
    setFanSpeed(fanManual ? fanManualSpeed : automaticFan);
  }
  evaluateTelegramAlerts();
  broadcast();
}
void drawMain(){
  updateClock();oled.clearDisplay();oled.setTextSize(1);oled.setTextColor(SSD1306_WHITE);
  oled.setCursor(1,0);oled.print("Orquidea IA v2.2");oled.drawLine(0,9,127,9,1);
  oled.setCursor(0,12);oled.printf("Temp: %.1f C",temperature);oled.setCursor(84,12);oled.printf("%d-%d",(int)tempMin,(int)tempMax);
  oled.setCursor(0,23);oled.printf("Hum:  %.1f %%",humidity);oled.setCursor(84,23);oled.printf("%d-%d",(int)humMin,(int)humMax);
  oled.drawLine(0,33,127,33,1);oled.setCursor(0,36);oled.print(mist?"NEBULIZ: ON":"NEBULIZ: OFF");
  oled.setCursor(78,36);oled.print(fanSpeed>0?"FAN: ON":"FAN: OFF");
  oled.setCursor(0,45);oled.printf("H2O:%d%%",(int)waterPct);oled.drawRect(48,44,48,8,1);oled.fillRect(49,45,(int)(46*waterPct/100),6,1);
  if(lowWater){oled.fillTriangle(112,43,104,52,120,52,1);oled.setTextColor(SSD1306_BLACK);oled.setCursor(109,45);oled.print("!");oled.setTextColor(SSD1306_WHITE);}
  oled.drawLine(0,54,127,54,1);oled.setCursor(0,56);oled.print(dateText);oled.setCursor(75,56);oled.print(timeText);oled.display();
}
void drawPrediction(){
  updateClock();oled.clearDisplay();oled.setTextSize(1);oled.setTextColor(SSD1306_WHITE);
  oled.setCursor(1,0);oled.print("Orquidea IA Previsao");oled.drawLine(0,9,127,9,1);
  // As duas previsões usam a velocidade de variação entre leituras DHT
  // válidas, projetada para aproximadamente os próximos dois minutos.
  float predictedTemp=isnan(temperature)?NAN:temperature+tempTrend*2.0f;
  float predictedHum=isnan(humidity)?NAN:humidity+humTrend*2.0f;
  oled.setCursor(0,16);oled.printf("Previsto T: %.1f C",predictedTemp);
  oled.setCursor(0,27);oled.printf("Previsto H: %.1f %%",predictedHum);
  // Estado explícito: identifica se o valor está abaixo, dentro ou acima
  // dos limites configurados, sem ocupar mais do que uma linha no OLED.
  const char* tempState=isnan(temperature)?"--":(temperature<tempMin?"Baixa":(temperature>tempMax?"Alta":"OK"));
  const char* humState=isnan(humidity)?"--":(humidity<humMin?"Baixa":(humidity>humMax?"Alta":"OK"));
  oled.setCursor(0,39);oled.printf("T:%s H:%s",tempState,humState);
  oled.drawLine(0,52,127,52,1);oled.setCursor(0,55);oled.print(dateText);oled.setCursor(75,55);oled.print(timeText);oled.display();
}
void drawStartup(const String& status){
  oled.clearDisplay();
  // O nome é a peça principal: faixa alta, invertida e centrada numa só linha.
  oled.fillRoundRect(2,3,124,23,4,SSD1306_WHITE);
  oled.setTextColor(SSD1306_BLACK);oled.setTextSize(1);
  oled.setCursor(13,11);oled.print("Orquidea IA v2.2");
  oled.setTextColor(SSD1306_WHITE);
  oled.drawLine(4,33,123,33,SSD1306_WHITE);
  // Apenas o estado de rede fica abaixo do título.
  oled.setCursor(4,43);oled.print(status);
  oled.display();
}
const char PAGE[] PROGMEM=R"HTML(<!doctype html><html lang='pt'><head><meta charset='UTF-8'><meta name='viewport' content='width=device-width,initial-scale=1'><title>Orquídea IA v2.2</title></head><style>body{max-width:560px;margin:auto;background:#121212;color:#eee;font:16px Arial;padding:12px}.card{background:#202020;border-radius:12px;padding:12px;margin:10px 0}.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.big{font-size:2em;color:#70c6ff}input{width:100%}button{background:#1976d2;color:white;border:0;border-radius:6px;padding:9px;margin:3px}.alert{display:none;background:#b71c1c;border-radius:8px;padding:10px}canvas{display:block;width:100%;height:auto;aspect-ratio:13/4;background:#181818;border-radius:4px;touch-action:none;cursor:crosshair}</style><body><h2>🌸 Orquidea IA <small>v2.2</small></h2><div id='alert' class='alert'></div><div class='grid'><div class='card'>Temperatura<div id='temp' class='big'>--</div><span id='tr'></span></div><div class='card'>Humidade<div id='hum' class='big'>--</div><span id='hr'></span></div></div><div class='card' id='overviewStats'><div class='sectionHead'><div><span class='eyebrow'>REGISTOS LOCAIS</span><b>Extremos de hoje</b></div><span class='liveDot'>Atualiza automaticamente</span></div><div id='overviewStatsBody' class='statsBody'>A carregar registos…</div><div class='chartBlock'><div class='chartTitle'><span class='chartSwatch tempSwatch'></span><b>Temperatura</b><small>Últimas 12 horas</small></div><div class='chartFrame'><canvas id='overviewTempChart' width='520' height='160'></canvas></div></div><div class='chartBlock'><div class='chartTitle'><span class='chartSwatch humSwatch'></span><b>Humidade</b><small>Últimas 12 horas</small></div><div class='chartFrame'><canvas id='overviewHumChart' width='520' height='160'></canvas></div></div></div><div class='card'>Água: <b id='water'></b>%<progress id='bar' max='100' style='width:100%'></progress>Nebulizador: <b id='mist'></b> · Modo: <b id='mistMode'></b><br><button onclick='send("mistAuto")'>Automático</button><button onclick='send("mistOn")'>Ligar manualmente</button><button onclick='send("mistStop")'>Parar</button><br>Horas: <span id='hours'></span>/100 h <button id='cleanReset' style='display:none' onclick='if(confirm("Já limpou o nebulizador? Isto vai reiniciar o contador de manutenção."))send("cleanReset")'>Limpeza concluída — repor contador</button></div><div class='card'><b>Limites e valores atuais</b><div class='grid' style='margin:8px 0'><div>Temperatura agora: <b id='tempLimit'>--</b></div><div>Humidade agora: <b id='humLimit'>--</b></div></div>Temp mín: <b><span id='tminValue'>--</span> °C</b><input type='range' id='tmin' min='0' max='50' oninput='sliderValue("tmin",this.value);set("tmin",this.value)'>Temp máx: <b><span id='tmaxValue'>--</span> °C</b><input type='range' id='tmax' min='0' max='50' oninput='sliderValue("tmax",this.value);set("tmax",this.value)'>Hum mín: <b><span id='hminValue'>--</span> %</b><input type='range' id='hmin' min='30' max='95' oninput='sliderValue("hmin",this.value);set("hmin",this.value)'>Hum máx: <b><span id='hmaxValue'>--</span> %</b><input type='range' id='hmax' min='30' max='95' oninput='sliderValue("hmax",this.value);set("hmax",this.value)'></div><div class='card'>🔮 Tendência T: <span id='tempTrend'></span>°C/min · Prevista em 2 min: <span id='tempFuture'></span>°C<br>Tendência H: <span id='trend'></span>%/min · Prevista em 2 min: <span id='future'></span>%</div><div class='card'><b>Ventilação no topo</b><br>Estado: <b id='fan'></b> · Modo: <b id='fanMode'></b><br>Rotação real: <b id='fanRpm'>--</b> RPM <span id='fanWarn'></span><br><button onclick='send("fanAuto")'>Automático</button><button onclick='send("fanOff")'>Parar</button><button onclick='send("fanMax")'>100%</button><br>Velocidade manual <input type='range' id='fanSlider' min='0' max='100' oninput='set("fanSpeed",this.value)'></div><div class='card'>Calibrar sensor: <button onclick='send("empty")'>Vazio</button><button onclick='send("full")'>Cheio</button><br>RAW: <span id='empty'></span> / <span id='full'></span></div><div class='card'><div class='sectionHead'><div><span class='eyebrow'>HISTÓRICO</span><b>Leituras guardadas</b></div></div><div class='historyTools'><select id='day'></select><button onclick='history()'>Ver</button><button onclick='download()'>CSV</button></div><div class='chartFrame historyChart'><canvas id='chart' width='520' height='160'></canvas></div><div id='chartStats' class='statsBody'></div></div><script>let ws,latestTelegramState=null;function renderTelegramState(d){latestTelegramState=d;let ti=document.getElementById('telegramInfo');if(ti){let configured=!!d.telegramConfigured;let status=(typeof d.telegramStatus==='string'&&d.telegramStatus.length)?d.telegramStatus:(configured?'Estado Telegram recebido do ESP32.':'Telegram ainda não configurado.');ti.textContent=(configured?'Telegram configurado. ':'Telegram ainda não configurado. ')+status}}async function refreshTelegramState(){try{let d=await fetch('/telegram-status',{cache:'no-store'}).then(r=>{if(!r.ok)throw new Error('estado indisponível');return r.json()});renderTelegramState(d)}catch(e){let ti=document.getElementById('telegramInfo');if(ti&&!latestTelegramState)ti.textContent='Ainda não foi possível obter o estado do ESP32.'}}function enableChartCursor(c,x,d,px,pyT,pyH,base){let active=false;function restore(){x.putImageData(base,0,0)}function show(e){let r=c.getBoundingClientRect(),mx=(e.clientX-r.left)*c.width/r.width,i=Math.round((mx-24)*Math.max(1,d.temps.length-1)/(c.width-24-36));i=Math.max(0,Math.min(d.temps.length-1,i));restore();let X=px(i),t=d.temps[i],h=d.hums[i];x.strokeStyle='#e8e8e8';x.lineWidth=1;x.setLineDash([3,3]);x.beginPath();x.moveTo(X,6);x.lineTo(X,c.height-24);x.stroke();x.setLineDash([]);x.fillStyle='#e7a36b';x.beginPath();x.arc(X,pyT(t),3,0,Math.PI*2);x.fill();x.fillStyle='#58c6b0';x.beginPath();x.arc(X,pyH(h),3,0,Math.PI*2);x.fill();let lines=[d.labels[i],t.toFixed(1)+' °C',h.toFixed(1)+' %'],bw=106,bh=48,bx=X+8>c.width-bw?X-bw-8:X+8,by=8;x.save();x.shadowColor='rgba(0,0,0,.38)';x.shadowBlur=10;x.fillStyle='rgba(10,28,20,.96)';x.strokeStyle='rgba(157,229,185,.38)';x.lineWidth=1;x.beginPath();x.roundRect(bx,by,bw,bh,7);x.fill();x.stroke();x.restore();x.fillStyle='#dff5e7';x.font='600 10px system-ui';lines.forEach((v,n)=>{if(n===1)x.fillStyle='#f1bd8f';else if(n===2)x.fillStyle='#75d8c5';else x.fillStyle='#dff5e7';x.fillText(v,bx+8,by+13+n*12)});active=true}c.onpointermove=show;c.onpointerdown=e=>{c.setPointerCapture&&c.setPointerCapture(e.pointerId);show(e)};c.onpointerleave=()=>{if(active)restore();active=false};c.onpointerup=()=>{if(active)restore();active=false}}function cmd(o){if(ws&&ws.readyState===1){ws.send(JSON.stringify(o));return true}return false}function send(c){cmd({cmd:c})}function set(c,v){cmd({cmd:c,v:+v})}function sliderValue(id,value){let label=document.getElementById(id+'Value');if(label)label.textContent=value}function connect(){ws=new WebSocket('ws://'+location.host+'/ws');ws.onclose=()=>setTimeout(connect,2000);ws.onmessage=e=>{let d=JSON.parse(e.data);temp.textContent=d.temp.toFixed(1)+' C';hum.textContent=d.hum.toFixed(1)+' %';tempLimit.textContent=d.temp.toFixed(1)+' C';humLimit.textContent=d.hum.toFixed(1)+' %';water.textContent=d.water;bar.value=d.water;mist.textContent=d.mist?'ON':'OFF';mistMode.textContent=d.manual?(d.manualMistOn?'Ligado manualmente':'Parado manualmente'):'Automático';hours.textContent=d.hours.toFixed(1);let cleanReset=document.getElementById('cleanReset');if(cleanReset)cleanReset.style.display=d.cleaningDue?'inline-block':'none';trend.textContent=d.trend.toFixed(1);future.textContent=d.future.toFixed(1);tempTrend.textContent=d.tempTrend.toFixed(2);tempFuture.textContent=d.tempFuture.toFixed(1);tr.textContent=d.tempMin+'-'+d.tempMax+' C';hr.textContent=d.humMin+'-'+d.humMax+' %';tmin.value=d.tempMin;tmax.value=d.tempMax;hmin.value=d.humMin;hmax.value=d.humMax;sliderValue('tmin',d.tempMin);sliderValue('tmax',d.tempMax);sliderValue('hmin',d.humMin);sliderValue('hmax',d.humMax);empty.textContent=d.rawEmpty;full.textContent=d.rawFull;let ssidEl=document.getElementById('ssid'),ipEl=document.getElementById('ip');if(ssidEl)ssidEl.textContent=d.ssid;if(ipEl)ipEl.textContent=d.ip;fan.textContent=d.fanSpeed+'%';fanMode.textContent=d.fanManual?'Manual':'Automático';fanSlider.value=d.fanManualSpeed;fanRpm.textContent=d.fanTachConnected?d.fanRpm:'--';fanWarn.textContent=!d.fanTachConnected?'(ventoinha ainda não ligada)':(d.fanFault?'⚠ Ventoinha sem rotação':'');alert.style.display=(d.waterAlert||d.fanFault)?'block':'none';alert.textContent=d.waterAlert?'⚠ Nível de água baixo — reabastece o depósito.':(d.fanFault?'⚠ A ventoinha recebeu comando mas não foram detetados RPM. 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function buildTabs(){
  const directCards=Array.from(document.body.children).filter(e=>e.classList&&e.classList.contains('card'));
  const overviewGrid=document.body.querySelector(':scope > .grid');
  const overviewStats=directCards[0],water=directCards[1],limits=directCards[2],prediction=directCards[3],fan=directCards[4],calibration=directCards[5],historyCard=directCards[6];
  if(!overviewGrid||!overviewStats||!water||!limits||!prediction||!fan||!calibration||!historyCard)return;
  const wifiCard=document.createElement('div');
  wifiCard.className='card';
  wifiCard.innerHTML='<b>Rede e acesso</b><br>Wi-Fi: <span id="ssid"></span><br>IP local: <span id="ip"></span><br><small>Acesso remoto apenas através de VPN.</small>';
  const telegramCard=document.createElement('div');
  telegramCard.className='card';
  telegramCard.innerHTML='<b>Notificações Telegram</b><br><small>O ESP32 usa apenas uma ligação HTTPS de saída; não abras portas no router.</small><br><label>Token do bot<input id="telegramToken" type="password" autocomplete="off" placeholder="Cole o token do BotFather"></label><label>Chat ID<input id="telegramChatId" inputmode="numeric" autocomplete="off" placeholder="Ex.: 123456789"></label><button id="saveTelegram">Guardar Telegram</button><button id="testTelegram">Testar Telegram</button><br><small id="telegramInfo">A aguardar estado do ESP32…</small>'; 
  const nav=document.createElement('nav');nav.className='tabNav';nav.setAttribute('aria-label','Menu do painel');
  const pages={};
  const definitions=[['overview','Visão geral',[overviewGrid,overviewStats]],['settings','Ajustes',[limits,water,fan,wifiCard,telegramCard]],['history','Histórico',[prediction,historyCard]],['calibration','Calibração',[calibration]]];
  definitions.forEach(([id,label,nodes])=>{let b=document.createElement('button'),page=document.createElement('section');b.type='button';b.textContent=label;b.dataset.tab=id;page.className='tabPage';page.id='tab-'+id;nodes.forEach(n=>page.appendChild(n));b.onclick=()=>openTab(id);nav.appendChild(b);document.body.appendChild(page);pages[id]={b,page};});
  document.querySelector('h2').insertAdjacentElement('afterend',nav);
  function openTab(id){Object.entries(pages).forEach(([key,item])=>{let active=key===id;item.b.classList.toggle('active',active);item.page.classList.toggle('active',active)});localStorage.setItem('orquidea-tab',id);window.scrollTo({top:0,behavior:'smooth'});}
  openTab(localStorage.getItem('orquidea-tab') in pages?localStorage.getItem('orquidea-tab'):'overview');
  document.getElementById('saveTelegram').onclick=()=>{let token=document.getElementById('telegramToken').value.trim(),chatId=document.getElementById('telegramChatId').value.trim();if(!token||!chatId){document.getElementById('telegramInfo').textContent='Introduz o token e o Chat ID antes de guardar.';return}cmd({cmd:'telegramSave',token:token,chatId:chatId});document.getElementById('telegramToken').value='';document.getElementById('telegramChatId').value='';};
  document.getElementById('testTelegram').onclick=()=>{let info=document.getElementById('telegramInfo');if(!cmd({cmd:'telegramTest'})){info.textContent='O painel perdeu a ligação ao ESP32. Aguarda alguns segundos e atualiza a página.';return}info.textContent='Pedido de teste enviado ao ESP32; a enviar mensagem Telegram…';};
  // O cartão é criado depois da ligação WebSocket. Mostra já o último estado
  // recebido, em vez de ficar preso no texto de espera até à próxima leitura.
  if(latestTelegramState)renderTelegramState(latestTelegramState);
  refreshTelegramState();
}
async function refreshOverviewStats(){const out=q('overviewStatsBody');try{let days=await fetch('/days').then(r=>r.json());days.sort().reverse();if(!days.length){out.textContent='Ainda não há registos válidos para apresentar.';return}let today=days[0],yesterday=days[1];let current=await fetch('/history?day='+encodeURIComponent(today)).then(r=>r.json());if(!current.temps||!current.temps.length){out.textContent='Ainda não há registos válidos para apresentar.';return}let stat=a=>({min:Math.min(...a),max:Math.max(...a)}),ct=stat(current.temps),ch=stat(current.hums);let previous=null;if(yesterday){let prior=await fetch('/history?day='+encodeURIComponent(yesterday)).then(r=>r.json());if(prior.temps&&prior.temps.length)previous={t:stat(prior.temps),h:stat(prior.hums)}}let delta=(v,old,unit)=>{if(!old)return '<span style="color:#aaa">sem comparação</span>';let d=v-old;if(Math.abs(d)<0.05)return '<span style="color:#aaa">= igual a ontem</span>';return d>0?'<span style="color:#edb07e">▲ +'+d.toFixed(1)+unit+' vs. ontem</span>':'<span style="color:#72cfbf">▼ '+d.toFixed(1)+unit+' vs. ontem</span>'};out.innerHTML='<small>'+today+'</small><br><b>Temperatura</b>: mín. '+ct.min.toFixed(1)+' °C '+delta(ct.min,previous&&previous.t.min,' °C')+'<br>Temperatura: máx. '+ct.max.toFixed(1)+' °C '+delta(ct.max,previous&&previous.t.max,' °C')+'<br><b>Humidade</b>: mín. '+ch.min.toFixed(1)+' % '+delta(ch.min,previous&&previous.h.min,' %')+'<br>Humidade: máx. '+ch.max.toFixed(1)+' % '+delta(ch.max,previous&&previous.h.max,' %')}catch(e){out.textContent='Não foi possível carregar o resumo dos registos.'}}function drawOverviewLine(canvasId,points,color,unit){let c=q(canvasId),x=c.getContext('2d'),w=c.width,h=c.height,p=30,right=10,bottom=22;x.clearRect(0,0,w,h);if(!points.length){x.fillStyle='#bbb';x.font='12px Arial';x.fillText('Ainda não há leituras válidas nas últimas 12 horas.',12,28);return}let values=points.map(v=>v.value),lo=Math.floor(Math.min(...values)-1),hi=Math.ceil(Math.max(...values)+1),range=Math.max(1,hi-lo),px=i=>p+i*(w-p-right)/Math.max(1,points.length-1),py=v=>h-bottom-(v-lo)*(h-bottom-12)/range;x.strokeStyle='#555';x.beginPath();x.moveTo(p,6);x.lineTo(p,h-bottom);x.lineTo(w-right,h-bottom);x.stroke();x.fillStyle='#72d59a';x.font='600 10px system-ui';x.fillText(hi+unit,1,12);x.fillText(lo+unit,1,h-bottom);x.fillStyle='#9fb9aa';x.fillText(points[0].label,p,h-5);x.fillText(points[points.length-1].label,w-42,h-5);x.strokeStyle=color;x.lineWidth=2;x.beginPath();points.forEach((v,i)=>i?x.lineTo(px(i),py(v.value)):x.moveTo(px(i),py(v.value)));x.stroke();let base=x.getImageData(0,0,w,h),active=false;function show(e){let r=c.getBoundingClientRect(),mx=(e.clientX-r.left)*w/r.width,i=Math.round((mx-p)*Math.max(1,points.length-1)/(w-p-right));i=Math.max(0,Math.min(points.length-1,i));x.putImageData(base,0,0);let X=px(i),v=points[i];x.strokeStyle='#eee';x.setLineDash([3,3]);x.beginPath();x.moveTo(X,6);x.lineTo(X,h-bottom);x.stroke();x.setLineDash([]);x.fillStyle=color;x.beginPath();x.arc(X,py(v.value),3,0,Math.PI*2);x.fill();let bw=118,bx=X+bw+8>w?X-bw-8:X+8;x.save();x.shadowColor='rgba(0,0,0,.38)';x.shadowBlur=10;x.fillStyle='rgba(10,28,20,.96)';x.strokeStyle='rgba(157,229,185,.38)';x.lineWidth=1;x.beginPath();x.roundRect(bx,8,bw,32,7);x.fill();x.stroke();x.restore();x.fillStyle='#dff5e7';x.font='600 10px system-ui';x.fillText(v.full,bx+8,20);x.fillStyle='#72d59a';x.font='750 11px system-ui';x.fillText(v.value.toFixed(1)+' '+unit,bx+8,32);active=true}c.onpointermove=show;c.onpointerdown=e=>{c.setPointerCapture&&c.setPointerCapture(e.pointerId);show(e)};c.onpointerleave=()=>{if(active)x.putImageData(base,0,0);active=false};c.onpointerup=()=>{if(active)x.putImageData(base,0,0);active=false}}
async function refreshOverviewCharts(){try{let days=await fetch('/days').then(r=>r.json());days.sort().reverse();let sets=await Promise.all(days.slice(0,2).map(day=>fetch('/history?day='+encodeURIComponent(day)).then(r=>r.json()).then(data=>({day,data}))));let cutoff=Date.now()-12*60*60*1000,temp=[],hum=[];sets.reverse().forEach(s=>{if(!s.data.labels)return;s.data.labels.forEach((label,i)=>{let stamp=new Date(s.day+'T'+label).getTime();if(stamp>=cutoff){let full=s.day.slice(8,10)+'/'+s.day.slice(5,7)+' '+label;temp.push({label,value:s.data.temps[i],full});hum.push({label,value:s.data.hums[i],full})}})});drawOverviewLine('overviewTempChart',temp,'#e7a36b',' °C');drawOverviewLine('overviewHumChart',hum,'#58c6b0',' %')}catch(e){}}
buildTabs();setTimeout(()=>{refreshOverviewStats();refreshOverviewCharts();refreshTelegramState()},400);setInterval(()=>{refreshOverviewStats();refreshOverviewCharts()},15000);setInterval(refreshTelegramState,4000);let st=document.createElement('style');st.textContent=css;document.head.appendChild(st);let panel=document.createElement('div');panel.className='card';panel.innerHTML=`<b>Personalizar painel</b><p style='font-size:.85em'>A escolha fica guardada neste browser.</p><div class='dashOpts'><label>Modo claro <input type='checkbox' id='lightMode'></label></div><p><b>Perfis de humidade</b><br><button id='orchidProfile'>Orquídea 60–70%</button><button id='nightProfile'>Noite 55–65%</button><button id='awayProfile'>Ausente 50–60%</button></p><p><b>Gráficos</b><br><button id='todayGraph'>Hoje / 24 h</button><button id='weekGraph'>Média dos últimos 7 dias</button></p>`;q('tab-history').appendChild(panel);function pref(k,v){localStorage.setItem('orquidea-'+k,v)}let lm=q('lightMode');lm.checked=localStorage.getItem('orquidea-light')==='true';document.body.classList.toggle('lightDash',lm.checked);lm.onchange=()=>{pref('light',lm.checked);document.body.classList.toggle('lightDash',lm.checked)};function profile(a,b){set('hmin',a);set('hmax',b)}q('orchidProfile').onclick=()=>profile(60,70);q('nightProfile').onclick=()=>profile(55,65);q('awayProfile').onclick=()=>profile(50,60);q('todayGraph').onclick=()=>history();q('weekGraph').onclick=async()=>{let days=await fetch('/days').then(r=>r.json());days.sort().reverse();let sets=await Promise.all(days.slice(0,7).map(day=>fetch('/history?day='+encodeURIComponent(day)).then(r=>r.json()).then(x=>({day,x}))));let d={labels:[],temps:[],hums:[]};sets.reverse().forEach(s=>{if(!s.x.temps||!s.x.temps.length)return;s.x.temps.forEach((v,i)=>{d.labels.push(s.day.slice(5)+' '+s.x.labels[i]);d.temps.push(v);d.hums.push(s.x.hums[i])})});let c=q('chart'),x=c.getContext('2d'),w=c.width,h=c.height,p=24,right=36;x.clearRect(0,0,w,h);if(!d.temps.length){x.fillStyle='#ddd';x.fillText('Ainda não há dados para os últimos 7 dias.',12,28);q('chartStats').textContent='Sem valores mínimos ou máximos para apresentar.';return}let tMinVal=Math.min(...d.temps),tMaxVal=Math.max(...d.temps),hMinVal=Math.min(...d.hums),hMaxVal=Math.max(...d.hums);q('chartStats').innerHTML='<b>Resumo dos últimos 7 dias</b><br>Temperatura: mín. '+tMinVal.toFixed(1)+' °C · máx. '+tMaxVal.toFixed(1)+' °C<br>Humidade: mín. '+hMinVal.toFixed(1)+' % · máx. '+hMaxVal.toFixed(1)+' %';let tLo=Math.floor(tMinVal-1),tHi=Math.ceil(tMaxVal+1),hLo=Math.floor(hMinVal-2),hHi=Math.ceil(hMaxVal+2),tRange=Math.max(1,tHi-tLo),hRange=Math.max(1,hHi-hLo),px=i=>p+i*(w-p-right)/Math.max(1,d.temps.length-1),pyT=v=>h-p-(v-tLo)*(h-p-12)/tRange,pyH=v=>h-p-(v-hLo)*(h-p-12)/hRange;x.strokeStyle='#555';x.lineWidth=1;x.beginPath();x.moveTo(p,6);x.lineTo(p,h-p);x.lineTo(w-right,h-p);x.lineTo(w-right,6);x.stroke();x.fillStyle='#72d59a';x.font='600 10px system-ui';x.fillText(tHi+' °C',1,12);x.fillText(tLo+' °C',1,h-p);x.fillStyle='#72d59a';x.fillText(hHi+' %',w-right+3,12);x.fillText(hLo+' %',w-right+3,h-p);x.fillStyle='#9fb9aa';x.fillText(d.labels[0],p,h-4);x.fillText(d.labels[d.labels.length-1],w-right-42,h-4);x.fillText('Últimos 7 dias',w/2-30,h-4);function line(a,color,convert){x.strokeStyle=color;x.lineWidth=2;x.beginPath();a.forEach((v,i)=>{let X=px(i),Y=convert(v);i?x.lineTo(X,Y):x.moveTo(X,Y)});x.stroke()}line(d.temps,'#e7a36b',pyT);line(d.hums,'#58c6b0',pyH);x.fillStyle='#72d59a';x.font='700 10px system-ui';x.fillText('Temperatura',p+16,14);x.fillText('Humidade',p+112,14);enableChartCursor(c,x,d,px,pyT,pyH,x.getImageData(0,0,w,h))}})();</script></body></html>)HTML";
void onWs(AsyncWebSocket*,AsyncWebSocketClient*,AwsEventType type,void*,uint8_t* data,size_t len){
  // Ao abrir o painel, entrega já o estado gravado (incluindo Telegram), sem
  // obrigar o utilizador a esperar pelo próximo ciclo de leitura do sensor.
  if(type==WS_EVT_CONNECT){broadcast();return;}
  if(type!=WS_EVT_DATA)return;JsonDocument doc;if(deserializeJson(doc,data,len)!=DeserializationError::Ok)return;
  String c=doc["cmd"]|"";
  if(c=="mistAuto"){manual=false;manualMistOn=false;} else if(c=="mistOn"){manual=true;manualMistOn=true; if(waterPct>=CRITICAL_WATER)setMist(true);} else if(c=="mistStop"){manual=true;manualMistOn=false;setMist(false);} else if(c=="fanAuto"){fanManual=false;} else if(c=="fanOff"){fanManual=true;fanManualSpeed=0;setFanSpeed(0);} else if(c=="fanMax"){fanManual=true;fanManualSpeed=100;setFanSpeed(100);} else if(c=="fanSpeed"){fanManual=true;fanManualSpeed=constrain((int)doc["v"],0,100);setFanSpeed(fanManualSpeed);} else if(c=="tmin")tempMin=constrain((float)doc["v"],0,49); else if(c=="tmax")tempMax=constrain((float)doc["v"],1,50); else if(c=="hmin")humMin=constrain((float)doc["v"],30,94); else if(c=="hmax")humMax=constrain((float)doc["v"],31,95); else if(c=="empty"){digitalWrite(WATER_PWR_PIN,HIGH);delay(10);rawEmpty=analogRead(WATER_SIG_PIN);digitalWrite(WATER_PWR_PIN,LOW);} else if(c=="full"){digitalWrite(WATER_PWR_PIN,HIGH);delay(10);rawFull=analogRead(WATER_SIG_PIN);digitalWrite(WATER_PWR_PIN,LOW);} else if(c=="telegramSave"){String token=doc["token"]|"";String chatId=doc["chatId"]|"";if(token.length()>=20 && chatId.length()>0){telegramToken=token;telegramChatId=chatId;telegramStatus="Configuração Telegram guardada";}else telegramStatus="Token ou Chat ID inválido";} else if(c=="cleanReset"){
    // Só repõe o registo de manutenção; não liga nem desliga o nebulizador.
    // Se estiver ligado, a nova contagem continua a partir deste instante.
    mistSeconds=0;
    if(mist)mistStart=millis();
    cleaningAlertSent=false;
  } else if(c=="telegramTest"){
    if(telegramToken.length()<20 || telegramChatId.length()==0) telegramStatus="Configure o token e o Chat ID antes do teste";
    else {telegramStatus="A enviar teste Telegram…";queueTelegram("Orquidea IA: teste Telegram recebido. As notificacoes estao ativas.");}
  }
  if(tempMin>=tempMax)tempMin=tempMax-1;if(humMin>=humMax)humMin=humMax-1;saveSettings();broadcast();
}
void setup(){
  Serial.begin(115200);
  // Segurança no arranque: mantém a névoa desligada antes de iniciar Wi-Fi,
  // servidor, OLED ou qualquer leitura de sensor.
  pinMode(MIST_EN_PIN,OUTPUT);digitalWrite(MIST_EN_PIN,LOW);
  pinMode(WATER_PWR_PIN,OUTPUT);digitalWrite(WATER_PWR_PIN,LOW);pinMode(LED_RED_PIN,OUTPUT);
  Wire.begin(OLED_SDA,OLED_SCL);oled.begin(SSD1306_SWITCHCAPVCC,0x3C);dht.begin();LittleFS.begin(true);if(!LittleFS.exists("/data"))LittleFS.mkdir("/data");loadSettings();
  // Tal como o nebulizador, a ventoinha nunca retoma um comando manual após
  // reinício: volta logo ao modo automático e a primeira leitura decide a velocidade.
  fanManual=false;
  fanManualSpeed=0;
  ledcAttach(FAN_PWM_PIN,FAN_PWM_HZ,FAN_PWM_BITS);fanSpeed=-1;setFanSpeed(0);
  // O fio TACH da NF-A4x10 está ligado através do pull-up de 10 kΩ a 3,3 V.
  if(FAN_TACH_CONNECTED){
    pinMode(FAN_TACH_PIN,INPUT_PULLUP);
    attachInterrupt(digitalPinToInterrupt(FAN_TACH_PIN),onFanTach,FALLING);
  }else{
    pinMode(FAN_TACH_PIN,INPUT_PULLUP);
  }
  lastTachSample=millis();
  // O ecrã de identidade mantém-se 10 s. Se a rede não estiver disponível,
  // o controlador arranca na mesma e a reconexão automática continua no loop.
  WiFi.mode(WIFI_STA);
  WiFi.setAutoReconnect(true);
  WiFi.persistent(false);
  WiFi.begin(WIFI_SSID,WIFI_PASS);
  lastWiFiAttempt=millis();
  unsigned long startupAt=millis();
  while(millis()-startupAt<10000UL){
    String status=WiFi.status()==WL_CONNECTED ? "IP: "+WiFi.localIP().toString() : "A ligar ao Wi-Fi...";
    drawStartup(status);
    delay(100);
  }
  if(WiFi.status()==WL_CONNECTED){
    drawStartup("IP: "+WiFi.localIP().toString());
    startMdns();
  }
  configTzTime("WET0WEST,M3.5.0/1,M10.5.0","pool.ntp.org");ArduinoOTA.setHostname("orquidea-ia");ArduinoOTA.begin();
  ws.onEvent(onWs);server.addHandler(&ws);server.on("/",HTTP_GET,[](AsyncWebServerRequest*r){AsyncWebServerResponse* response=r->beginResponse_P(200,"text/html; charset=utf-8",PAGE);response->addHeader("Cache-Control","no-store, no-cache, must-revalidate, max-age=0");r->send(response);});server.on("/telegram-status",HTTP_GET,[](AsyncWebServerRequest*r){JsonDocument doc;doc["telegramConfigured"]=(telegramToken.length()>=20 && telegramChatId.length()>0);doc["telegramStatus"]=telegramStatus;String out;serializeJson(doc,out);AsyncWebServerResponse* response=r->beginResponse(200,"application/json",out);response->addHeader("Cache-Control","no-store, no-cache, must-revalidate, max-age=0");r->send(response);});server.on("/days",HTTP_GET,[](AsyncWebServerRequest*r){r->send(200,"application/json",daysJson());});server.on("/history",HTTP_GET,[](AsyncWebServerRequest*r){r->send(200,"application/json",historyJson(r->hasParam("day")?r->getParam("day")->value():""));});server.on("/download",HTTP_GET,[](AsyncWebServerRequest*r){String d=r->hasParam("day")?r->getParam("day")->value():"";String p="/data/"+d+".csv";if(!LittleFS.exists(p)){r->send(404,"text/plain","Sem dados");return;}AsyncWebServerResponse*q=r->beginResponse(LittleFS,p,"text/csv");q->addHeader("Content-Disposition","attachment; filename=orquidea-"+d+".csv");r->send(q);});server.begin();
}
void loop(){
  maintainWiFi();
  serviceTelegram();
  ArduinoOTA.handle();ws.cleanupClients();updateFanRpm();unsigned long now=millis();if(now-lastRead>=READ_MS){lastRead=now;readControl();}if(now-lastHistory>=HISTORY_MS){lastHistory=now;saveHistory();}if(now-lastPage>=5000UL){lastPage=now;predictionPage=!predictionPage;}if(predictionPage)drawPrediction();else drawMain();digitalWrite(LED_RED_PIN,lowWater&&((now/500)%2));
}