#include <Wire.h>
#include <Adafruit_INA219.h>
#include <OneWire.h>
#include <DallasTemperature.h>

/* -------- PIN DEFINITIONS -------- */
#define ONE_WIRE_BUS 4        // DS18B20 DATA pin
#define SDA_PIN 21
#define SCL_PIN 22

/* -------- OBJECTS -------- */
Adafruit_INA219 ina219;
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

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

  // I2C for INA219
  Wire.begin(SDA_PIN, SCL_PIN);

  // Initialize sensors
  ina219.begin();
  sensors.begin();

  Serial.println("Battery / Adapter Monitoring System Started");
  Serial.println("12V Adapter assumed -> LM2596 -> 3.3V");
}

void loop() {
  // Read voltage & current from INA219
  float busVoltage = ina219.getBusVoltage_V();     // Simulated voltage
  float current_mA = ina219.getCurrent_mA();       // Current through load

  // Read temperature from DS18B20
  sensors.requestTemperatures();
  float temperatureC = sensors.getTempCByIndex(0);

  Serial.println("-------- STATUS --------");
  Serial.print("Voltage      : ");
  Serial.print(busVoltage);
  Serial.println(" V");

  Serial.print("Current      : ");
  Serial.print(current_mA);
  Serial.println(" mA");

  Serial.print("Temperature  : ");
  Serial.print(temperatureC);
  Serial.println(" °C");
  Serial.println();

  delay(2000);
}