CH3 > Ibatt ( = IR1 + IR2 )
CH2 > IR1 ( = 12 / 220 ohm)
CH1 > IR2 ( = 12 / 330 ohm)
#include <Wire.h>
#include <INA3221.h>
#define SERIAL_SPEED 115200 // serial baud rate
#define PRINT_DEC_POINTS 3 // decimal points to print
// Set I2C address to 0x41 (A0 pin -> VCC)
INA3221 ina(INA3221_ADDR40_GND);
void current_measure_init() {
ina.begin(&Wire);
ina.reset();
ina.setShuntRes(10, 10, 10);
}
void setup() {
Serial.begin(SERIAL_SPEED);
current_measure_init();
while (!Serial) {
delay(1);
}
// Set shunt resistors to 10 mOhm for all channels
}
void loop() {
Serial.printf(
"Channel A:\n\r==========\n\r Current = %3.0fmA \t Voltage = %1.1fV \t ShuntVoltage = %1.1fV\r\n \r\n",
ina.getCurrent(INA3221_CH1) * 1000, ina.getVoltage(INA3221_CH1), ina.getShuntVoltage(INA3221_CH1));
Serial.printf(
"Channel B:\n\r==========\n\r Current = %3.0fmA \t Voltage = %1.1fV \t ShuntVoltage = %1.1fV\r\n \r\n",
ina.getCurrent(INA3221_CH2) * 1000, ina.getVoltage(INA3221_CH2), ina.getShuntVoltage(INA3221_CH2));
Serial.printf(
"Channel C:\n\r==========\n\r Current = %3.0fmA \t Voltage = %1.1fV \t ShuntVoltage = %1.1fV\r\n \r\n",
ina.getCurrent(INA3221_CH3) * 1000, ina.getVoltage(INA3221_CH3), ina.getShuntVoltage(INA3221_CH3));
Serial.printf(
"_______________________________________\r\n\r\n");
delay(2000);
}
ina3221.pdf