67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/**********************************************
|
|
* INA219 library example
|
|
* 9 January 2016 by Flavius Bindea
|
|
*
|
|
* this code is public domain.
|
|
**********************************************/
|
|
|
|
|
|
#include <Wire.h>
|
|
#include <INA219.h>
|
|
|
|
#define SHUNT_MAX_V 0.04 /* Rated max for our shunt is 75mv for 50 A current:
|
|
we will mesure only up to 20A so max is about 75mV*20/50 lets put some more*/
|
|
#define BUS_MAX_V 16.0 /* with 12v lead acid battery this should be enough*/
|
|
#define MAX_CURRENT 20 /* In our case this is enaugh even shunt is capable to 50 A*/
|
|
#define SHUNT_R 0.015 /* Shunt resistor in ohm */
|
|
|
|
INA219 monitor;
|
|
|
|
void setup()
|
|
{
|
|
Serial.begin(57600);
|
|
monitor.begin();
|
|
// setting up our configuration
|
|
// default values are RANGE_32V, GAIN_8_320MV, ADC_12BIT, ADC_12BIT, CONT_SH_BUS
|
|
monitor.configure(INA219::RANGE_16V, INA219::GAIN_2_80MV, INA219::ADC_64SAMP, INA219::ADC_64SAMP, INA219::CONT_SH_BUS);
|
|
|
|
// calibrate with our values
|
|
monitor.calibrate(SHUNT_R, SHUNT_MAX_V, BUS_MAX_V, MAX_CURRENT);
|
|
}
|
|
|
|
void loop()
|
|
{
|
|
Serial.println("******************");
|
|
|
|
Serial.print("raw shunt voltage: ");
|
|
Serial.println(monitor.shuntVoltageRaw());
|
|
|
|
Serial.print("raw bus voltage: ");
|
|
Serial.println(monitor.busVoltageRaw());
|
|
|
|
Serial.println("--");
|
|
|
|
Serial.print("shunt voltage: ");
|
|
Serial.print(monitor.shuntVoltage() * 1000, 4);
|
|
Serial.println(" mV");
|
|
|
|
Serial.print("shunt current: ");
|
|
Serial.print(monitor.shuntCurrent() * 1000, 4);
|
|
Serial.println(" mA");
|
|
|
|
Serial.print("bus voltage: ");
|
|
Serial.print(monitor.busVoltage(), 4);
|
|
Serial.println(" V");
|
|
|
|
Serial.print("bus power: ");
|
|
Serial.print(monitor.busPower() * 1000, 4);
|
|
Serial.println(" mW");
|
|
|
|
Serial.println(" ");
|
|
Serial.println(" ");
|
|
|
|
delay(1000);
|
|
}
|
|
|
|
|