Battery Reading Code Rev 0

#include <Wire.h> //Needed to Use ADS1115 ADC - See Reference 12
#include <ADS1115_lite.h> //Needed to Use ADS1115 ADC - See Reference 12
ADS1115_lite ads(ADS1115_DEFAULT_ADDRESS); //0x48 addr pin connected to GND. Needed to Use ADS1115 ADC - See Reference 12
long raw1 = 0, raw2 = 0; //Needed to Use ADS1115 ADC - See Reference 12
double resolution=0; //Needed to Use ADS1115 ADC - See Reference 12
int batt1Analog = 0, batt2Analog=0; //Analog readings from batt1Pin and batt2Pin and then actual battery voltages
float batt1V=0, batt2V=0;
unsigned long previousMillis = 0;      // will store last time the battery voltages were read
const long interval = 10000;           // interval at which to read the battery voltage (milliseconds)
#define battCutOff 3.2 //Voltage to Cutoff Motors to Protect the Batteries

void setup()
{ //start of void setup()
  ads_config(); //Needed to Use ADS1115 ADC - See Reference 12
} //end of void setup()

void loop()
{ //start of void loop()

unsigned long currentMillis = millis(); //check to see if it's time to read the battery voltages; that is, if the difference between the current time and last time you read the battery voltages is bigger than the interval at which you want to read the battery voltages.

    if (currentMillis - previousMillis >= interval)
    { //Start of if (currentMillis - previousMillis >= interval)
        previousMillis = currentMillis; //save the last time you read the battery voltages before you read the battery voltages
        readBatts(); //Read the battery voltages
    } //End of if (currentMillis - previousMillis >= interval)

} //end of void loop()

void readBatts()
{ //Start of readBatts function definition
  raw1 = ads_read1(); //Reads A0 from ADS1115 - Reference 12
  resolution=4096.00/32752.00;
  delay(200);
  float result1=(raw1*resolution)/1000.00; //batt1 voltage + batt2 voltage
  raw2 = ads_read2(); //Reads A0 from ADS1115 - Reference 12
  delay(200);
  float result2=(raw2*resolution)/1000.00; //batt2 voltage alone
  batt1V = result1 - result2; //Assigns battery 1 voltage alone to batt1V variable
  batt1V = 11.03*batt1V;
  batt2V = result2; //Assigns result2 to the batt2V variable
  batt2V = 11.0*batt2V;

  //This section of code sends the battery voltages to the Android app
  SerialBT.print("|");  //Delimeter separating values which the receiving app is programmed to recognize
  SerialBT.print("W");  //Delimeter separating values which the receiving app is programmed to recognize
  SerialBT.print("|");  //Delimeter separating values which the receiving app is programmed to recognize
  SerialBT.print(batt1V);
  SerialBT.print("|");  //Delimeter separating values which the receiving app is programmed to recognize
  SerialBT.print("w");  //Delimeter separating values which the receiving app is programmed to recognize

  SerialBT.print("|");  //Delimeter separating values which the receiving app is programmed to recognize
  SerialBT.print("Z");  //Delimeter separating values which the receiving app is programmed to recognize
  SerialBT.print("|");  //Delimeter separating values which the receiving app is programmed to recognize
  SerialBT.print(batt2V);
  SerialBT.print("|");  //Delimeter separating values which the receiving app is programmed to recognize
  SerialBT.print("z");  //Delimeter separating values which the receiving app is programmed to recognize

  if (batt1V < battCutOff || batt2V < battCutOff) //If either battery drops below the cutoff voltage
  { //Start of if (batt1V < battCutOff || batt2V < battCutOff)
    stopVehicle(); //Stop Power to the Motors
    lightFState = 0; //Turns Off Front Lights
    lightBState = 0; //Turns Off Back Lights
    hornH(); //Turns horn on briefly
    delay(100);
    hornL();
   } //End of if (batt1V < battCutOff || batt2V < battCutOff)

} //End of readBatts function definition

void ads_config(){
  ads.setGain(ADS1115_REG_CONFIG_PGA_4_096V); // GAIN_ONE and resolution to ± 4.096V
  ads.setSampleRate(ADS1115_REG_CONFIG_DR_8SPS); // Set to the fastest MODE 860Samples per sec
}

int16_t ads_read1(){
  ads.setMux(ADS1115_REG_CONFIG_MUX_SINGLE_0);  // Single mode input on AIN0 (AIN0 - GND)
  ads.triggerConversion();  // Triggered mannually
  return ads.getConversion();  // returns int16_t value
}

int16_t ads_read2(){
  ads.setMux(ADS1115_REG_CONFIG_MUX_SINGLE_1);  // Single mode input on AIN1 (AIN1 - GND)
  ads.triggerConversion();  // Triggered mannually
  return ads.getConversion();  // returns int16_t value
}
//Reference 12- Reading Analog Voltages Using ADS1115 https://www.youtube.com/watch?v=u-1TRpLGH04