Hi
I have the INA219 I2C Bi-directional DC Current Power Supply Sensor Breakout Module. I’m trying to make it work. I made the right connections to my Arduino UNO R3 board.
On the other hand, I have another power circuit which powers a led. It is connected to a 9V power supply which generates a 5 Volt power using MB102 Breadboard Power Supply Module. When I run the default Adafruit_INA219 getcurrent application (see code bellow), all what I’m getting is constant numbers (zeros) for the voltage and the current. Basically, it is like the chip is not functioning.
I attached all the relevant pictures. Can anybody help with what wrong I’m doing?
Thanks in advance
Daher.
PS. The code that I’m using :
#include <Wire.h>
#include <Adafruit_INA219.h>
Adafruit_INA219 ina219;
void setup(void)
{
Serial.begin(115200);
while (!Serial) {
// will pause Zero, Leonardo, etc until serial console opens
delay(1);
}
uint32_t currentFrequency;
Serial.println(“Hello!”);
// Initialize the INA219.
// By default the initialization will use the largest range (32V, 2A). However
// you can call a setCalibration function to change this range (see comments).
ina219.begin();
// To use a slightly lower 32V, 1A range (higher precision on amps):
//ina219.setCalibration_32V_1A();
// Or to use a lower 16V, 400mA range (higher precision on volts and amps):
//ina219.setCalibration_16V_400mA();
Serial.println(“Measuring voltage and current with INA219 …”);
}
void loop(void)
{
float shuntvoltage = 0;
float busvoltage = 0;
float current_mA = 0;
float loadvoltage = 0;
float power_mW = 0;
shuntvoltage = ina219.getShuntVoltage_mV();
busvoltage = ina219.getBusVoltage_V();
current_mA = ina219.getCurrent_mA();
power_mW = ina219.getPower_mW();
loadvoltage = busvoltage + (shuntvoltage / 1000);
Serial.print(“Bus Voltage: “); Serial.print(busvoltage); Serial.println(” V”);
Serial.print(“Shunt Voltage: “); Serial.print(shuntvoltage); Serial.println(” mV”);
Serial.print(“Load Voltage: “); Serial.print(loadvoltage); Serial.println(” V”);
Serial.print(“Current: “); Serial.print(current_mA); Serial.println(” mA”);
Serial.print(“Power: “); Serial.print(power_mW); Serial.println(” mW”);
Serial.println("");
delay(2000);
}