voltmeter script complete example

[sergiodorazio]

Hi , have you a complete example Voltmeter script ?

I have window Voltmeter that works well in run mode and it read 3.4 Volt.

I need a script that read the voltage value. I run this

 

if(!('Voltmeter' in this)) throw "Please open a Voltmeter";

var vPtt = 0;
var media = 0;

for(var i = 0; i < 10; i++){
    vPtt1 = Voltmeter.Input.Channel1.DC.value;
    media = media + vPtt;
    wait(0.1);
    print("vPtt: "+vPtt+" V");

}
media = media / 10;
var f = File("data.txt");
f.write(media+" voltPtt");

 

the value vPtt is always 0 , why ?

Have you an example ?

[attila]

Hi @sergiodorazio

Notice that you place the voltage reading to "vPtt1" and later used "vPtt"

The Voltmeter already performs averaging. The DC is calculated based on average of the specified Update rate.
If you want to average it further, use wait at least this amount of time, like:
wait(Voltmeter.State.Update.value)

Edited July 19, 2021 by attila

[sergiodorazio]

big Attila,

thank you, the problem is solved.

[sergiodorazio]

Hi, I have test better,

the script work only if I am running "Voltmeter" otherwise read the last value read and it not update the value.

How can I update the read value by script ?

Sergio

[attila]

Hi @sergiodorazio

Voltmeter.run()
wait(0.1)
for(var i = 0; i < 10 && wait(Voltmeter.State.Update.value); i++){
    print(Voltmeter.Input.Channel1.DC.value)
}

[sergiodorazio]

Hi Attila,

very good. Now it'work.

I have an other question : If I have 1 script, from windows command line I can run script by command : "WaveForm.exe myconf.dwf3work -runscript" . How I read in help documentation,  If I have 2 script ,  I use this commands : "WaveForm.exe myconf.dwf3work -script scriptname1" and "WaveForm.exe myconf.dwf3work -script scriptname2" but the script that run is the last script saved in the last configuration and not "scriptname1" or "scriptname2". Can you help me ?

Sergio.

Edited July 22, 2021 by sergiodorazio

[attila]

Hi @sergiodorazio

The selected script tab will be executed, as the workspace was saved.
Save separate workspace with each script.

[sergiodorazio]

Yes, but there is a bug ? The possibility of script selection not work ?

For my application is better to have a single configuration with different scripts.

Sergio.

[attila]

Hi @sergiodorazio

At the time when these arguments where added the Script had no tabs, only one script could exist.

The next WF version (3.16.31) will support selecting the tab, reusing the script argument to load a file, like: WaveForms mywork.dwf3work -script "tab 2"

Edited July 22, 2021 by attila