loop in realtime arduino reading

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I want to read a value of the variable each 0.02 seconds I write this code:
for i=2:100
actually I want to read the count of the encoder for the loop (i=2:100)
each 0.02 secound

Accepted Answer

Walter Roberson
Walter Roberson on 23 Mar 2019
Use a timer object with FixedRate . Be sure to pre-allocate c.
You might have some difficulty reaching 50 readings per second over the USB connection, unless you use a bit of code or a sketch on the arduino side to keep sending out the values instead of waiting for general commands. It is not uncommon for people to report they only get about 40 samples per second unless they run more dedicated code on the arduino.
john white
john white on 7 Apr 2019
any way, thank you so much Walter Roberson for your help

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