arduino INA226

arduino INA226

#include <Wire.h>
#include <INA226_WE.h>   
#define I2C_ADDRESS 0x40
 
INA226_WE ina226 = INA226_WE(I2C_ADDRESS);
 
void setup() 
{
  Serial.begin(9600);
  while (!Serial); // wait until serial comes up on Arduino Leonardo or MKR WiFi 1010
  Wire.begin();
  ina226.init();
 
  /* Set Number of measurements for shunt and bus voltage which shall be averaged
    Mode *     * Number of samples
    AVERAGE_1            1 (default)
    AVERAGE_4            4
    AVERAGE_16          16
    AVERAGE_64          64
    AVERAGE_128        128
    AVERAGE_256        256
    AVERAGE_512        512
    AVERAGE_1024      1024*/
 
  //ina226.setAverage(AVERAGE_16); // choose mode and uncomment for change of default
 
  /* Set conversion time in microseconds
     One set of shunt and bus voltage conversion will take:
     number of samples to be averaged x conversion time x 2
 
       Mode *         * conversion time
     CONV_TIME_140          140 µs
     CONV_TIME_204          204 µs
     CONV_TIME_332          332 µs
     CONV_TIME_588          588 µs
     CONV_TIME_1100         1.1 ms (default)
     CONV_TIME_2116       2.116 ms
     CONV_TIME_4156       4.156 ms
     CONV_TIME_8244       8.244 ms  */
 
  //ina226.setConversionTime(CONV_TIME_1100); //choose conversion time and uncomment for change of default
 
  /* Set measure mode
    POWER_DOWN - INA226 switched off
    TRIGGERED  - measurement on demand
    CONTINUOUS  - continuous measurements (default)*/
 
  //ina226.setMeasureMode(CONTINUOUS); // choose mode and uncomment for change of default
 
  /* Set Resistor and Current Range
     if resistor is 5.0 mOhm, current range is up to 10.0 A
     default is 100 mOhm and about 1.3 A*/
 
  ina226.setResistorRange(0.1, 1.3); // choose resistor 0.1 Ohm and gain range up to 1.3A
 
  /* If the current values delivered by the INA226 differ by a constant factor
     from values obtained with calibrated equipment you can define a correction factor.
     Correction factor = current delivered from calibrated equipment / current delivered by INA226*/
 
  ina226.setCorrectionFactor(0.93);
 
  Serial.println("INA226 Current Sensor Example Sketch - Continuous");
 
  ina226.waitUntilConversionCompleted(); //if you comment this line the first data might be zero
}
 
void loop()
{
  float shuntVoltage_mV = 0.0;
  float loadVoltage_V = 0.0;
  float busVoltage_V = 0.0;
  float current_mA = 0.0;
  float power_mW = 0.0;
 
  ina226.readAndClearFlags();
  shuntVoltage_mV = ina226.getShuntVoltage_mV();
  busVoltage_V = ina226.getBusVoltage_V();
  current_mA = ina226.getCurrent_mA();
  power_mW = ina226.getBusPower();
  loadVoltage_V  = busVoltage_V + (shuntVoltage_mV / 1000);
 
  Serial.print("Shunt Voltage [mV]: "); Serial.println(shuntVoltage_mV);
  Serial.print("Bus Voltage [V]: "); Serial.println(busVoltage_V);
  Serial.print("Load Voltage [V]: "); Serial.println(loadVoltage_V);
  Serial.print("Current[mA]: "); Serial.println(current_mA);
  Serial.print("Bus Power [mW]: "); Serial.println(power_mW);
  if (!ina226.overflow)
  {
    Serial.println("Values OK - no overflow");
  }
  else
  {
    Serial.println("Overflow! Choose higher current range");
  }
  Serial.println();
 
  delay(3000);
}