Interfacing arduino and matlab

[abusid1170]

Hey guys!
I am trying to read the output voltage value of TGS822 sensor using arduino's analog pins.
through serial communication i wish to plot it in the MATLAB.(I want to see the variation of the sensor value as a plot).That's my objective.
But the problem is,
*multimeter and the arduno's serial monitor shows different readings.
*normally sensor output value fluctuates between say(0.67 and .68) and it goes to next value.it wouldn't remain in a constant value.
but i dont want this fluctuation to be seen in my plot.
*if arduino shows the reading correctly ,then interfacing with the matlab stands as an another problem.It plots different values.

thanks for reply in advance.
If u hav another idea ,please putforward

 

[pavans2510]

Hi,
Please have a look at the bit-rate, parity and byte length.


Thanks

 

[u7karsh]

In order to remove the fluctuation, you have two options.. one is u add a delay in ur arduino code to slow down the readings of adc.. or u could possibly use a software filter to filter out all those unnecesary fluctuations like by using a moving average filter etc..

also when u are transmitting the values from arduino, it is considered as a character stream.. u need to convert them back to integer or float..