// Juan A. Villalpando.
// KIO4.COM
// Pone los LED12 y LED13 en alto o bajo.
// Consulta el estado de los pulsadores.

////////////// Screen LCD I2C ///////////////
#include <LiquidCrystal_I2C.h>
int columnas = 16;
int filas = 2;
LiquidCrystal_I2C lcd(0x27, columnas, filas);  
// LiquidCrystal_I2C lcd(0x3F, columnas, filas); 
////////////////////////////////////////////////
#include "BluetoothSerial.h"

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth no activado! Activa la conexion Bluetooth.
#endif

BluetoothSerial SerialBT;
 
#define LED12  12    // LED en terminal 12
#define LED13  13    // LED en terminal 12
#define pulsa16 16   // Pulsador en terminal 16.
#define pulsa17 17   // Pulsador en terminal 17.
int valor16;
int valor17;
String d12;
String d13;
String p16;
String p17;
String todos = "0,0,0,0";
String palabra = "-";

void setup() {
  lcd.init();      // Screen LCD                    
  lcd.backlight(); // Screen LCD
  Serial.begin(9600);
  pinMode(LED12, OUTPUT);
  pinMode(LED13, OUTPUT);
  pinMode(pulsa16, INPUT);
  pinMode(pulsa17, INPUT);
  
  SerialBT.begin("ESP32test");
}
 
void loop() {
 if(SerialBT.available()) {
     palabra = SerialBT.readStringUntil('\n');   

     // Realiza la peticion del cliente.
          if (palabra == "on12"){digitalWrite(LED12, HIGH);}
          if (palabra == "off12"){digitalWrite(LED12, LOW);}
          if (palabra == "on13"){digitalWrite(LED13, HIGH);}
          if (palabra == "off13"){digitalWrite(LED13, LOW);}
     
         if (palabra == "consulta"){consulta();}
         if (palabra.indexOf("lcd") != -1)
      {
      palabra = palabra.substring(3,palabra.length());
      escribe_lcd();
       }

} // Fin de available.
} // Fin de loop.

// Consulta el estado de los elementos.
void consulta(){
   if(digitalRead(LED12) == HIGH) {d12 = "LED12 encendido.";} else {d12 = "LED12 apagado.";}
   if(digitalRead(LED13) == HIGH) {d13 = "LED13 encendido.";} else {d13 = "LED13 apagado.";}
 valor16 = digitalRead(pulsa16);
   if (valor16 == HIGH) {p16 = "Pulsador16 PULSADO";} else {p16 = "Pulsador16 NO pulsado";}
 valor17 = digitalRead(pulsa17);
   if (valor17 == HIGH) {p17 = "Pulsador17 PULSADO";} else {p17 = "Pulsador17 NO pulsado";}
  
   todos = d12 + "," + d13 + "," + p16 + "," + p17 + "\n";
   SerialBT.print(todos);
   delay(10);
}

// Pantalla LCD
void escribe_lcd(){
  lcd.clear(); // Borra pantalla.
  lcd.setCursor(0, 0); // Inicio del cursor
  lcd.print(palabra);
  lcd.setCursor(0,1); // Siguiente renglón.
  lcd.print("KIO4.COM");
  Serial.println(palabra);
}

// Juan A. Villalpando.
// KIO4.COM
// Pone los LED4 en alto o bajo.
// Consulta el estado del LED4.

#include "BluetoothSerial.h"
#define LED4 4

BluetoothSerial SerialBT;

void setup() {
  Serial.begin(115200);
  initBT();
  pinMode(LED4, OUTPUT);
}

void initBT(){
  if(!SerialBT.begin("ESP32CAM-CLASSIC-BT")){
    Serial.println("An error occurred initializing Bluetooth");
    ESP.restart();
  }else{
    Serial.println("Bluetooth initialized");
  }

  SerialBT.register_callback(btCallback);
  Serial.println("The device started, now you can pair it with bluetooth");
}

void btCallback(esp_spp_cb_event_t event, esp_spp_cb_param_t *param){
  if(event == ESP_SPP_SRV_OPEN_EVT){
    Serial.println("Client Connected!");
  }else if(event == ESP_SPP_DATA_IND_EVT){
    Serial.printf("ESP_SPP_DATA_IND_EVT len=%d, handle=%d\n\n", param->data_ind.len, param->data_ind.handle);
        String stringRead = String(*param->data_ind.data);
        int paramInt = stringRead.toInt() - 48;
        Serial.printf("paramInt: %d\n", paramInt);
        if(paramInt == 1){digitalWrite(LED4, HIGH); writeSerialBT("LED 4 is ON.");}
        if(paramInt == 0){digitalWrite(LED4, LOW); writeSerialBT("LED 4 is OFF.");}
        if(paramInt == 3){
          if(digitalRead(LED4)){writeSerialBT("LED 4 now is ON.");}
          else {writeSerialBT("LED 4 now is OFF.");}
        }
    }
}

void writeSerialBT(String respuesta){
  SerialBT.println(respuesta);
  SerialBT.flush();
}

void loop() { }

// Juan A. Villalpando.
// KIO4.COM
// Pone el LED4 en alto o bajo.
// Consulta el estado del LED4.
// Recibe un texto.

#include "BluetoothSerial.h"
#define LED4 4

BluetoothSerial SerialBT;

void setup() {
  Serial.begin(115200);
  initBT();
  pinMode(LED4, OUTPUT);
}

void initBT(){
  if(!SerialBT.begin("ESP32CAM-CLASSIC-BT")){
    Serial.println("An error occurred initializing Bluetooth");
    ESP.restart();
  }else{
    Serial.println("Bluetooth initialized");
  }

  SerialBT.register_callback(btCallback);
  Serial.println("The device started, now you can pair it with bluetooth");
}

void btCallback(esp_spp_cb_event_t event, esp_spp_cb_param_t *param){
  if(event == ESP_SPP_SRV_OPEN_EVT){
    Serial.println("Client Connected!");
  }else if(event == ESP_SPP_DATA_IND_EVT){
    Serial.printf("ESP_SPP_DATA_IND_EVT len=%d, handle=%d\n\n", param->data_ind.len, param->data_ind.handle);
        String received = bluetoothReadLine();
        Serial.println(received);
        if(received.indexOf("Set LED4 ON") != -1){digitalWrite(LED4, HIGH); writeSerialBT("LED 4 is ON.");}
        else if(received.indexOf("Set LED4 OFF") != -1){digitalWrite(LED4, LOW); writeSerialBT("LED 4 is OFF.");}
        else if(received.indexOf("How are you?") != -1){
          if(digitalRead(LED4)){writeSerialBT("LED 4 now is ON.");}
          else {writeSerialBT("LED 4 now is OFF.");}
        }
        else {writeSerialBT("Message received: " + received);}
    }
}

String bluetoothReadLine(){
    String text_received = "";
    while(SerialBT.available())
    {
        byte r = SerialBT.read();
        if(r!=13 && r!=10 && char(r)!='\0')
            text_received = text_received + char(r);
    }
    return text_received;      
}


void writeSerialBT(String respuesta){
  SerialBT.println(respuesta);
  SerialBT.flush();
}


void loop() { }

// Juan A. Villalpando.
// KIO4.COM
// El doble de tres números.

#include "BluetoothSerial.h"

BluetoothSerial SerialBT;

void setup() {
  Serial.begin(115200);
  initBT();
}

void initBT(){
  if(!SerialBT.begin("ESP32CAM-CLASSIC-BT")){
    Serial.println("An error occurred initializing Bluetooth");
    ESP.restart();
  }else{
    Serial.println("Bluetooth initialized");
  }

  SerialBT.register_callback(btCallback);
  Serial.println("The device started, now you can pair it with bluetooth");
}

void btCallback(esp_spp_cb_event_t event, esp_spp_cb_param_t *param){
  if(event == ESP_SPP_SRV_OPEN_EVT){
    Serial.println("Client Connected!");
  }else if(event == ESP_SPP_DATA_IND_EVT){
        while(SerialBT.available())
             {
              String a =  SerialBT.readStringUntil(',');
              String b =  SerialBT.readStringUntil(',');
              String c =  SerialBT.readStringUntil('\n');
              String retorno = (String)(2 * a.toInt()) +","+ (String)(2 * b.toInt()) +","+ (String)(2 * c.toInt());
              SerialBT.println(retorno);
            } 
    }
}

void loop() { }

// Juan A. Villalpando.
// http://kio4.com/arduino/180_Wemos_Bluetooth_LED_Pulsadores.htm

#include "BluetoothSerial.h"

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth no activado! Activa la conexion Bluetooth.
#endif

BluetoothSerial SerialBT;

int alea_1;
int alea_2;
unsigned long tiempo_actual_1 = 0;
unsigned long tiempo_actual_2 = 0;

void setup() {
  Serial.begin(9600);
  SerialBT.begin("ESP32test");
}
 
void loop() {
 if((millis()-tiempo_actual_1)>= 200){
    int alea_1 = random(0,100);
    int alea_2 = random(0,1000);
    tiempo_actual_1 = millis();
    SerialBT.println(String(alea_1) + "," + String(alea_2));
  }
}