const int voltagePin = A0;  // Voltage sensor pin
const int currentPin = A1;   // Current sensor pin
const float C = 100.0;       // Battery capacity in Ah
float SoC = 100.0;           // Initial State of Charge

// Define the resistances for the voltage divider
const float R1 = 10000.0;    // Resistance R1 in ohms
const float R2 = 10000.0;    // Resistance R2 in ohms

void setup() {
    Serial.begin(9600);       // Initialize serial communication
}

void loop() {
    // Read voltage and current values
    float voltage = analogRead(voltagePin) * (5.0 / 1023.0) * (R1 + R2) / R2;  // Voltage calculation
    float current = analogRead(currentPin) * (5.0 / 1023.0);                     // Current calculation

    // Calculate change in charge (Ah)
    float change_in_charge = current * (1.0 / 3600.0);  // Convert seconds to hours

    // Update SoC
    SoC += (change_in_charge / C) * 100;
    SoC = constrain(SoC, 0, 100);  // Clamp SoC between 0 and 100%

    // Print estimated SoC
    Serial.print("Estimated SoC: ");
    Serial.print(SoC);
    Serial.println("%");

    delay(1000);  // Delay for next reading
}