Sampling rate is not accurate (Arduino support package)

Hello everyone, I am using the Arduino Support package on Simulink to acquire an input signal and send the samples to workspace. The sampling rate specified in the 'analog-read' block is 0.01. This means that, when running the model for 20 seconds, I should expect 2000 data points (2000 X 1 vector in workspace). This is however not happening. It seems that Simulink is not collecting 100 samples per second. it would randomly collect a number of samples all of which are different than what is specified (0.01). Any ideas why this is happening? and how to solve it. Thank you. Here is a screenshot of my model.

Answer 1

[Madhu Govindarajan]

If these are the only blocks in your model, then two more things to notice are sampling time of Workspace blocks and the sampling time of your model itself