Arduino İle Batarya Seviye Testi

#include "U8glib.h"
#define MOSFET_Pin 2
#define Bat_Pin A0
#define Res_Pin A1
#define Buzzer_Pin 9
U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NONE); // I2C / TWI 
float Capacity = 0.0; // Capacity in mAh
float Res_Value = 10.0; // Resistor Value in Ohm
float Vcc = 4.64; // Voltage of Arduino 5V pin ( Mesured by Multimeter )
float Current = 0.0; // Current in Amp
float mA=0; // Current in mA
float Bat_Volt = 0.0; // Battery Voltage 
float Res_Volt = 0.0; // Voltage at lower end of the Resistor 
float Bat_High = 4.3; // Battery High Voltage
float Bat_Low = 2.9; // Discharge Cut Off Voltage
unsigned long previousMillis = 0; // Previous time in ms
unsigned long millisPassed = 0; // Current time in ms
float sample1 =0;
float sample2= 0;
int x = 0;
int row = 0;
 
//************************ OLED Display Draw Function *******************************************************
void draw(void) {
 u8g.setFont(u8g_font_fub14r); // select font
 if ( Bat_Volt < 1){
 u8g.setPrintPos(10,40); // set position
 u8g.println("No Battery!"); 
 }
 else if ( Bat_Volt > Bat_High){
 u8g.setPrintPos(25,40); // set position
 u8g.println("High-V!"); 
 }
 else if(Bat_Volt < Bat_Low){
 u8g.setPrintPos(25,40); // set position
 u8g.println("Low-V!"); 
 }
 else if(Bat_Volt >= Bat_Low && Bat_Volt < Bat_High ){
  
 u8g.drawStr(0, 20, "Volt: "); // put string of display at position X, Y
 u8g.drawStr(0, 40, "Curr: ");
 u8g.drawStr(0, 60, "mAh: ");
 u8g.setPrintPos(58,20); // set position
 u8g.print( Bat_Volt,2); // display Battery Voltage in Volt
 u8g.println("V"); 
 u8g.setPrintPos(58,40); // set position
 u8g.print( mA,0); // display current in mA
 u8g.println("mA"); 
 u8g.setPrintPos(58, 60); // set position
 u8g.print( Capacity ,1); // display capacity in mAh
  
}
}
//******************************Buzzer Beep Function *********************************************************
 
void beep(unsigned char delay_time){
 analogWrite(9, 20); // PWM signal to generate beep tone
 delay(delay_time); // wait for a delayms ms
 analogWrite(Buzzer_Pin, 0); // 0 turns it off
 delay(delay_time); // wait for a delayms ms
 
}
 
//*******************************Setup Function ***************************************************************
  
 void setup() {
 Serial.begin(9600);
 pinMode(MOSFET_Pin, OUTPUT);
 pinMode(Buzzer_Pin, OUTPUT);
 digitalWrite(MOSFET_Pin, LOW); // MOSFET is off during the start
 Serial.println("CLEARDATA");
 Serial.println("LABEL,Time,Bat_Volt,capacity");
  
 //Serial.println("Arduino Battery Capacity Tester v1.0");
 //Serial.println("BattVolt Current mAh");
 }
 //********************************Main Loop Function***********************************************************
 void loop() {
 // Vcc = readVcc()/1000.0; // Conevrrt mV to Volt
 
 // Voltage devider Out = Bat_Volt * R2/(R1+R2 ) // R1 =10K and R2 =10K 
  
 //************ Measuring Battery Voltage ***********
  
 for(int i=0;i< 100;i++)
 {
 sample1=sample1+analogRead(Bat_Pin); //read the voltage from the divider circuit
 delay (2);
 }
 sample1=sample1/100; 
 Bat_Volt = 2* sample1 *Vcc/ 1024.0;
 
// ********* Measuring Resistor Voltage ***********
 
for(int i=0;i< 100;i++)
 {
 sample2=sample2+analogRead(Res_Pin); //read the voltage from the divider circuit
 delay (2);
 }
 sample2=sample2/100;
 Res_Volt = 2* sample2 * Vcc/ 1024.0;
 
//********************* Checking the different conditions *************
  
 if ( Bat_Volt > Bat_High){
 digitalWrite(MOSFET_Pin, LOW); // Turned Off the MOSFET // No discharge 
 beep(200);
 Serial.println( "Warning High-V! ");
 delay(1000);
 }
  
 else if(Bat_Volt < Bat_Low){
 digitalWrite(MOSFET_Pin, LOW);
 beep(200);
 Serial.println( "Warning Low-V! ");
 delay(1000);
 }
 else if(Bat_Volt > Bat_Low && Bat_Volt < Bat_High ) { // Check if the battery voltage is within the safe limit
 digitalWrite(MOSFET_Pin, HIGH);
 millisPassed = millis() - previousMillis;
 Current = (Bat_Volt - Res_Volt) / Res_Value;
 mA = Current * 1000.0 ;
 Capacity = Capacity + mA * (millisPassed / 3600000.0); // 1 Hour = 3600000ms
 previousMillis = millis();
 Serial.print("DATA,TIME,"); Serial.print(Bat_Volt); Serial.print(","); Serial.println(Capacity);
 row++;
 x++;
 delay(4000); 
  
 }
  
 //**************************************************
 
u8g.firstPage(); 
 do {
 draw();
 } while( u8g.nextPage() );
  
 //*************************************************
 }