Undefined function or variable 'I2Cdev'.

I am trying do a interface for mpu6050 . I have installed arduino support packages for matlab and simulink but , i have an error says

Undefined function or variable 'I2Cdev'.

Here is my code;

%% setup 
hold all
a=arduino;
mpu= I2Cdev (a,'0x68'); %mpu adress is normally 0x68
writeRegister(mpu, hex2dec('B6'), hex2dec('00'), 'int16'); %reset
data=zeros(10000,14,'int8'); %prelocating for the speed
j=1;
a1 = animatedline('Color',[1 0 0]); 
a2 = animatedline('Color',[0 1 0]);
a3 = animatedline('Color',[0 0 1]);
legend('Accel_x','Accel_y','Accel_z')

%% loop
while(true)
    x=1;
    for i=59:72 % 14 Data Registers for Accel,Temp,Gyro
        data(j,x)= readRegister(mpu, i, 'int8');
        x=x+1;
    end
    y=swapbytes(typecast(data(j,:), 'int16')) %if your system is big-endian remove the swapbytes function
    addpoints(a1,j,double(y(1)));
    addpoints(a2,j,double(y(2)));
    addpoints(a3,j,double(y(3)));
    j=j+1;
    drawnow limitrate
end

[WAN NOR NAZIRA MUSTAPA KAMAL]

I am facing with the same problem, did you find the solution?

[linani messaoud]

Change commands:

a=arduino;

mpu= I2Cdev (a,'0x68'); %mpu adress is normally 0x68

to commands:

a = arduino('COM4','Uno','Libraries','I2C');

mpu = device(a,'I2CAddress','0x68')

Answer 1

[Walter Roberson]

You are using arduino. The arduino interface does not use ic2dev . See https://www.mathworks.com/help/supportpkg/arduinoio/examples/measure-temperature-from-i2c-device-on-arduino-hardware.html

Answer 2

[madhan ravi]

https://www.mathworks.com/help/supportpkg/raspberrypiio/ref/i2cdev.i2cdev.html - matlab is case sensitive i2cdev lowercase letters

[Walter Roberson]

ic2dev used there is for Raspberry Pi, not arduino.

Answer 3

[Gayatri Menon]

The below link might help you in interfacing mpu6050 connected to arduino:

https://www.mathworks.com/help/supportpkg/arduinoio/ref/mpu6050-system-object.html

Thanks

Gayatri

Answer 4

[Gokarna Baskota]

I got the same problem while using R2020a.

But when I use R2018a than problem is solved.

Solution:

Try to run code in MatLab version lower than 2019 Or replace I2Cdev() by mpu6050()