INA219 Current Sensor Integration with MATLAB

Hi There,

I am trying to use a INA219 current sensor to obtain the voltage and current and thus power from a Solar Panel. This chip works with an arduino. I have coded in arduino and got the values i require however when I try to read these values on MATLAB I cannot get it to work.

The Code that I have written is Here:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

clc clear all

a = arduino;

INA219 = '0x40';

INA219_ADC_CH0 = '40'; % getBusVoltage_V

INA219_ADC_CH1 = '41'; % getVoltage_mV

INA219_ADC_CH3 = '43'; % getCurrent_mA

i2c = i2cdev(a,INA219);

disp(['getBusVoltage_V ', 'getVoltage_mV', 'getCurrent_mA']);

while 1

getBusVoltage_V = read_adc(i2c,hex2dec(INA219_ADC_CH0));

pause(0.5);

getVoltage_mV = read_adc(i2c,hex2dec(INA219_ADC_CH1));

pause(0.5);

getCurrent_mA = read_adc(i2c,hex2dec(INA219_ADC_CH3));

pause(0.5);

disp([getBusVoltage_V,getVoltage_mV,getCurrent_mA]);

end

function adc = read_adc(dev,config)

write(dev,config);

read(dev, 3);

out = read(dev, 3);

adc = out;

end

~~~~~~~~~~~~~~~~~~~~~~~~~~~

Where the output is:

   60     0     0

    31     3     0

   255   255   255.

I was expecting an output of roughly:

2.46 0.03 0.07
*obtained from my arduino code.

I cannot seem to find where I've gone wrong, perhaps my limited knowledge in the area. Any help you could provide to rectify this would be great.

Regards,

Jayden

[Martin Blocher]

Hi there, I'm having the same problem, did you get it to work? If so, please let me know, thank you.

[Raul Ballesteros]

I have the same problem If find the solution Please share the vos es Thanks

[Gongyan Du]

I have the same problem

Answer 1

[Gongyan Du]

Have you solved this problem, can you share it?