Automatic sensor calibration in simulink

Hi all, i'm reading data from a sensor attached to an arduino mega using a s-function to get the data directly from arduino to simulink ... but when the sensor is not moving it give me a value around zero so in every execution of the model i must calibrate the sensor .. So i was wondering if i can set automatic calibration in simulink to calibrate automatically the sensor , for example in the first 5 minutes so that i will not need to set the offset every time

thanks a lot

[chfakht chfakht]

[Daniel Berger]

Is the Problem now solved? I have the same problem. How can i calibrate the Sensor, when i start the program?