#include <Wire.h>
#include "DFRobot_INA219.h"
DFRobot_INA219_IIC     ina219(&Wire, INA219_I2C_ADDRESS4);

// Revise the following two paramters according to actual reading of the INA219 and the multimeter
// for linearly calibration
float ina219Reading_mA = 1000;
float extMeterReading_mA = 1000;

void setup(void) 
{
    Serial.begin(115200);
    //Open the serial port
    while(!Serial);
    
    Serial.println();
    //Initialize the sensor
    while(ina219.begin() != true) {
        Serial.println("INA219 begin faild");
        delay(2000);
    }
    //Linear calibration
    ina219.linearCalibrate(/*The measured current before calibration*/ina219Reading_mA, /*The current measured by other current testers*/extMeterReading_mA);
    Serial.println();
}

void loop(void)
{
    Serial.print("BusVoltage:   ");
    Serial.print(ina219.getBusVoltage_V(), 2);
    Serial.println("V");
    Serial.print("Current:      ");
    Serial.print(ina219.getCurrent_mA(), 1);
    Serial.println("mA");
    Serial.print("Power:        ");
    Serial.print(ina219.getPower_mW(), 1);
    Serial.println("mW");
    Serial.println("");
    delay(1000);
}