Hello ,
I have a new project that I ned to use the INA219 .
For this project I'm using the Arduino Ethernet (No POE).
I have connected the INA219 as it should
INA219 -- Arduino
VCC - 3.3V
Gnd - GND
Scl - SCL
Dsa - DSA
using this sample code I found online:
#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);
}
but on the serial monitor I can't see nothing
only
"Hello!"
and I don't even get this line
Measuring voltage and current with INA219 ...
what could be the problem ?
I have try to use 3 more INA219 - in all of them I get the same resualt
I have also ise the i2c scanner code to see where is the problem
// --------------------------------------
// i2c_scanner
//
// Version 1
// This program (or code that looks like it)
// can be found in many places.
// For example on the Arduino.cc forum.
// The original author is not know.
// Version 2, Juni 2012, Using Arduino 1.0.1
// Adapted to be as simple as possible by Arduino.cc user Krodal
// Version 3, Feb 26 2013
// V3 by louarnold
// Version 4, March 3, 2013, Using Arduino 1.0.3
// by Arduino.cc user Krodal.
// Changes by louarnold removed.
// Scanning addresses changed from 0...127 to 1...119,
// according to the i2c scanner by Nick Gammon
// http://www.gammon.com.au/forum/?id=10896
// Version 5, March 28, 2013
// As version 4, but address scans now to 127.
// A sensor seems to use address 120.
// Version 6, Dec 29, 2013
// reduced size (RAM, Flash)
//
//
// This sketch tests the standard 7-bit addresses
// Devices with higher bit address might not be seen properly.
//
#include <Wire.h>
void PrintAddress(byte addr)
{
if ( addr < 16 )
{
Serial.print("0");
};
Serial.print(addr, HEX);
Serial.print(" (");
Serial.print(addr);
Serial.println(")");
};
void setup()
{
delay(2000); //wait for terminal to be open by user
Wire.begin();
Serial.begin(9600);
Serial.println(F("\nI2C Scanner\n"));
};
void loop()
{
byte error, address;
int nDevices;
Serial.println(F("Scanning...\n"));
nDevices = 0;
for ( address = 1; address < 127; address++ )
{
// The i2c_scanner uses the return value of
// the Write.endTransmisstion to see if
// a device did acknowledge to the address.
Wire.beginTransmission(address);
error = Wire.endTransmission();
if ( error == 0 )
{
Serial.print(F("I2C device found at address 0x"));
PrintAddress(address);
nDevices++;
}
else if ( error == 4 )
{
Serial.print(F("Unknown error at address 0x"));
PrintAddress(address);
};
};
if ( nDevices == 0 )
{
Serial.println(F("No I2C devices found\n"));
}
else
{
Serial.println("\nDone!\n");
};
delay(4000); // wait 15 seconds for next scan
};
I don't see the devices at all
but ifI took the INA219 and connect it to the PI and run the scanner command
sudo i2cdetect -y 1
I get a resualt :
sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- 45 -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
how could it be ?
Thanks,
