/*
 * Arduino code to control DFRobot Power shield
 * Using this code you can turn ON or turn OFF output power on DFRobot Power shield
 * 
 * Written by Ahmad Shamshiri for Robojax.com on Sep 01, 2018 at 11:07 in Ajax, Ontario, Canada
 * Watch a video instruction for this code:
 * 
 * This code has been downloaded from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 * 
 */

const float vFactor = 5.0; //  (30000+7500)/7500 = 5
void setup() {

  pinMode(13,OUTPUT);// pin to control power Chip On or OFF
  digitalWrite(13, LOW);// initially turn it ON
  Serial.begin(9600);

}

void loop() {
  delay(4000);
  digitalWrite(13, LOW);// turn the output power ON
    Serial.println("Power ON");
  delay(3000);// off for 3 seconds
  digitalWrite(13, HIGH);//turn it OFF
    Serial.println("Power OFF");
  
 
}

/*
 * Arduino code to control DF Robot Power shield
 * Using this code you can turn ON or turn OFF the output power of the shield
 * and also the voltage is sensed at A0 pin and displayed in the serial monitor
 * 
 * Written by Ahmad Shamshiri for Robojax.com on Sep 01, 2018 at 11:07 in Ajax, Ontario, Canada
 * Watch video instructions for this code: https://youtu.be/WUeLbif-6YQ
 * 
 * This code has been downloaded from Robojax.com
 * Get Arduino Code and watch videos at Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 * 
 */

const float vFactor = 5.0; //  (30000+7500)/7500 = 5 // see watch video for full details
void setup() {

  pinMode(13,OUTPUT);// pin to control power Chip On or OFF
  digitalWrite(13, LOW);// initially turn it ON
  Serial.begin(9600);

}

void loop() {
   digitalWrite(13,LOW);// turn ON the power
   int voltageRaw = analogRead(A0); // read A0 voltage

   float voltage = voltageRaw *(5.0/1023.0) * vFactor; // convert RAW value to actual voltage
   Serial.print("Voltage: ");
   Serial.print(voltage, 3);
   Serial.println("V");
   delay(300);
   if(voltage > 11.5)
   {
     digitalWrite(13,HIGH);// turn OFF the power
     Serial.println("Voltage limit reached ");
     delay(5000);
   }else{
     digitalWrite(13,LOW);// turn ON the power
   }
   
   delay(500);
   Serial.println("=======");
}

/*
 * Arduino code to control DF Robot Power shield
 * Using this code you can turn ON or turn OFF output power
 * and display output voltage on LCD1602 as a voltmeter
 * 
 * Written by Ahmad Shamshiri for Robojax.com on Sep 01, 2018 at 11:07 in Ajax, Ontario, Canada
 * Watch video instruction for this code:https://youtu.be/WUeLbif-6YQ
 * 
 * This code has been downloaded from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 * 
 */

const float vFactor = 5.0; //  (30000+7500)/7500 = 5

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {

  pinMode(13,OUTPUT);// pin to control power Chip On or OFF
  digitalWrite(13, LOW);// initially turn it ON
  Serial.begin(9600);


  // initialize the LCD, 
  lcd.begin();
  // Turn on the backlight and print a message.
  lcd.backlight();
  lcd.clear();
   lcd.setCursor (0,0); //
   lcd.print("Robojax DF Robot"); 
   lcd.setCursor (0,1); //   
 
}

void loop() {
   digitalWrite(13,LOW);// turn ON the power
   int voltageRaw = analogRead(A0); // read A0 voltage

   float voltage = voltageRaw *(5.0/1023.0) * vFactor; // convert RAW value to actual voltage
  lcd.clear();// clear previous values from screen
  lcd.setCursor (0,0); //character zero, line 1
  lcd.print("Robojax V meter"); // print text  
  
  lcd.setCursor (0,1); //character zero, line 1
  lcd.print("Voltage:"); // print text  
  lcd.setCursor (9,1); //character 9, line 1
  lcd.print(voltage); // print voltage 
  lcd.setCursor (14,1); //character 14, line 1
  lcd.print("V"); // print V
    
  delay(500);    
}