K30 sensor interface with MATLAB by using arduino board

HI, I am trying to read a data from K30 sensor with MATLAB by using arduino board. Here I am using I2C communication Before this I was able to read many sensor data with MATLAB by using arduino board with I2C communication. but for K30 sensor I am able to read the address and follow the data and write the required bytes, but when I read I am getting error "Failed to read 4 uint8 value(s) from the device." The code used is :

clear all
clc
a=arduino('com1', 'nano3', 'Libraries', 'I2C');
scanI2CBus(a);
dev = i2cdev(a,'0x68');
write(dev, hex2dec('D0'));
write(dev, hex2dec('22'));
write(dev, hex2dec('00'));
write(dev, hex2dec('08'));
write(dev, hex2dec('2A'));
pause(0.1);
write(dev, hex2dec('D1'));
out = read(dev,4,'uint8')

Please help to resolve this issue. I am using MATLAB 2015a

Thanks Mahadev

[Mahadevanna S]

hi all,

finally i made it work:

code is :

Below is the code which will work:

a=arduino('com1', 'nano3', 'Libraries', 'I2C');
scanI2CBus(a);
dev = i2cdev(a,'0x68');

mod_read=[34,0,8,42];%hex values converted to decimal
write(dev, mod_read);
pause(20e-3);
out = read(dev, 4,'uint8');

hope it is helpful to you all

Answer 1

[Mahadevanna S]

hi all, finally i made it work: code is :

Below is the code which will work:

a=arduino('com1', 'nano3', 'Libraries', 'I2C');
scanI2CBus(a);
dev = i2cdev(a,'0x68');

mod_read=[34,0,8,42];%hex values converted to decimal
write(dev, mod_read);
pause(20e-3);
out = read(dev, 4,'uint8');

hope it is helpful to you all

[Eyal Wurgaft]

Hi,

Thank you for posting the code. I tried running the code:

a=arduino('com13', 'uno', 'Libraries', 'I2C');
scanI2CBus(a);
dev = i2cdev(a,'0x68');
mod_read=[34,0,8,42];%hex values converted to decimal
write(dev, mod_read);
pause(20e-3);
out = read(dev, 4,'uint8');

but I got the following error:

Failed to read 4 uint8 value(s) from the device.

All the connections work well, I read CO2 values easily using Arduino IDE.

Will appreciate your help.

Eyal