UPDATE DATA every 5 sec

I have a ekg sensor attached which reads the heart rate and i have written the code to display Beats per minute based on it. How can add code so that it reads data every 5 seconds and save BPM.

[mbvoyager]

I do not really understand your issue.

But a very quick and very very dirty solution could be to use a for or while loop and input the function pause or wait.

As seen in: function wait

This is far from exact in timing but it can limit the readings of your data to a certain coarse interval.

In general it might be a good idea if you look into the usage of timers. Can be found in: timer class.

[Eeman Fatima]

I have this code which reads the data from the sensor and then calculates beat per minuts is there anyway i can make so that it automatically updates data every5 seconds and save the bpm for each time.

Answer 1

[mbvoyager]

Look into the examples of

timer class.

With the timer class it is possible to call a function in certain time intervals.

Here is a minimal working example exactly from the help page of the timer class:

t = timer;
t.StartFcn = @(~,thisEvent)disp([thisEvent.Type ' executed '...
    datestr(thisEvent.Data.time,'dd-mmm-yyyy HH:MM:SS.FFF')]);
t.TimerFcn = @(~,thisEvent)disp([thisEvent.Type ' executed '...
     datestr(thisEvent.Data.time,'dd-mmm-yyyy HH:MM:SS.FFF')]);
t.StopFcn = @(~,thisEvent)disp([thisEvent.Type ' executed '...
    datestr(thisEvent.Data.time,'dd-mmm-yyyy HH:MM:SS.FFF')]);
t.Period = 5;                                                    % 5 seconds interval executing TimerFcn 
t.TasksToExecute = 3;                                            % 3 total calls excecuting TimerFcn
t.ExecutionMode = 'fixedRate';
start(t)

The output will be:

StartFcn executed 06-Sep-2018 14:15:03.161
TimerFcn executed 06-Sep-2018 14:15:03.161
TimerFcn executed 06-Sep-2018 14:15:05.162
TimerFcn executed 06-Sep-2018 14:15:07.161
StopFcn executed 06-Sep-2018 14:15:07.168

After that to delete the timer object

delete(t)

I hope this can help you.