// https://forum.arduino.cc/t/sending-data-from-arduino-to-esp8266-via-i2c-communication/1040331/4
//https://randomnerdtutorials.com/esp32-esp8266-i2c-lcd-arduino-ide/

#include <ESP8266WiFi.h>
#include <WiFiClient.h> 
#include <ESP8266WebServer.h>
#include <ESP8266HTTPClient.h>
#include <LiquidCrystal_I2C.h>

#define D0    16
#define D1    5
#define D2    4
#define D3    0
#define D4    2
#define D5    14
#define D6    12
#define D7    13
#define D8    15
#define D9    3
#define D10   1

int lcdColumns = 16;
int lcdRows = 2;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows); 

int SwA=14;
int SwB=12;
int Push=15;
int Led=16;
int pHSense = 0; //A0
int samples = 10;
///float adc_resolution = 1024.0;
float adc_resolution = 1024.0;




float ph (float voltage) {
  if(voltage< 4.2){
    return 7;
  }else if(voltage< 4.4) {
    return 5;
  }else{
    return 4;
  }
}
const char *ssid = "TP-Link_688A";
const char *password = "debarbamiguel";
const int http_port = 8080;
int Ph,Luz;

WiFiClient client;

void setup() {
  lcd.init();
  lcd.backlight();

  pinMode(Push,INPUT);
  pinMode(SwA,OUTPUT);  
  pinMode(SwB,OUTPUT);
  pinMode(Led,OUTPUT);
  Serial.begin(115200);
  WiFi.mode(WIFI_OFF);delay(1000);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);Serial.println(".");
  Serial.print("Conectando...");
  lcd.clear();      
  lcd.setCursor(0,0);
  lcd.print("Conectando WiFi");
  int col=0;
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);Serial.print(".");
    col++;
    lcd.setCursor(col,1);
    lcd.print("."); 
    }
    
    Serial.println ("");
    Serial.print ("Conectado a ");Serial.println (ssid);
    lcd.setCursor(0,0);
    lcd.print ("Conectado a ");
    lcd.setCursor(0,1);
    lcd.println (ssid);
    delay(3000);
    
    lcd.clear();

    Serial.print ("Endereço IP: ");Serial.println (WiFi.localIP ());
    lcd.setCursor(0,0);
    lcd.print ("End. IP:");
    lcd.setCursor(0,1);
    lcd.println (WiFi.localIP());
    Serial.print("MAC: ");    Serial.println(WiFi.macAddress());    
    delay(3000);
}
void envia(String postData){
    HTTPClient http;
    http.begin(client,"http://mpt.migueldebarba.com.br/piloto_insert.php");
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");
    int httpCode = http.POST(postData);
    String payload = http.getString();
    Serial.println("httpCode:"+String(httpCode));
    Serial.println("payload:"+payload);
    http.end();
    if (payload=="OK"){digitalWrite(D0,HIGH);delay(1000);}
    digitalWrite(D0,LOW);
  }

void calibra(){
      int measurings=0;
    for (int i=0;i<samples; i++){
        measurings += analogRead(pHSense);
        delay(10);}
    float voltage = 5 / adc_resolution * measurings/samples;
    Serial.print("pH= ");
    Ph=(ph(voltage));        
    
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print ("Ph "+String(Ph));
      Serial.println ("Ph "+String(Ph));
      delay(1000);
}  
  
void leitura(){
      lcd.clear();      
      Serial.println("Push Leitura");
      lcd.setCursor(0,0);
      lcd.print("Push Leitura");
      delay(1000);
      int measurings=0;

    for (int i=0;i<samples; i++){
        measurings += analogRead(pHSense);
        delay(10);}
    float voltage = 5 / adc_resolution * measurings/samples;
    Serial.print("pH= ");
    Ph=(ph(voltage));        
     
      digitalWrite(SwA,0);
      digitalWrite(SwB,0);
      delay(500);
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print ("Ph "+String(Ph));
      
      delay(500);
      digitalWrite(SwA,1);
      digitalWrite(SwB,1);
      digitalWrite(Led,HIGH);
      Luz=analogRead(0);
      lcd.setCursor(0,1);
      lcd.print ("Luz "+String(Luz));
      delay(100);
      digitalWrite(Led,LOW);

      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print ("Gravando BD...");
      lcd.setCursor(0,1);
      lcd.print ("Gravado sucesso!");
      delay(1000);
      
}  


void loop() {
    if (digitalRead(Push)==1){
     leitura();
//      calibra();
      String Mac=WiFi.macAddress();     
      String postData = "MMac="+String(Mac)+"&PPh="+String(Ph)+"&LLuz="+String(Luz);
     envia(postData); 
      }
      lcd.setCursor(0,0);
      lcd.print ("IFSC/OI3/2024_1");      
      lcd.setCursor(0,1);
      lcd.print ("Qualidade H2O");      
      delay(1000);
 
}