Can someone please please help? I combined arduino and MCC DAQ? Problem reading analog voltage (see attached VI)

[GRCK5000]

I am using arduino to output the PWM and MCC DAQ to read the update analog voltage. It was working at some point. So every time I would change PWM, the analog voltage would change accordingly. Now, the voltage is not updating anymore when I change the PWM. 

So for 100% duty cycle - I am expecting 0.095. I don't have any problem with this. The only problem that I am having is when I changed it to lower duty cycle, I kept getting 0.095 as you can see. I tried to throw an invoke node to reinitialize values, but it's not working. 

Good  analog value

Wrong analog value

[GerdW · Accepted solution]

Hi GRCK,

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@GRCK5000 wrote:

I am using arduino to output the PWM and MCC DAQ to read the update analog voltage. It was working at some point. So every time I would change PWM, the analog voltage would change accordingly. Now, the voltage is not updating anymore when I change the PWM. 

So for 100% duty cycle - I am expecting 0.095. I don't have any problem with this. The only problem that I am having is when I changed it to lower duty cycle, I kept getting 0.095 as you can see. I tried to throw an invoke node to reinitialize values, but it's not working. 

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Do you get any errors? Did you debug your VI (using probes or additional indicators)?

Keep in mind: we don't have your hardware, neither your Arduino, no ULx device and not your UUT!

You need to provide a lot more information to expect/get any usable help…

What's the point of setting the DutyCycle increment property so often?

Why don't you place PWM output and AI reading into just one loop?

[GRCK5000]

Hi GerdW,

Yes, sorry about the duty cycle increment. I really don't need it. 

Thanks a lot! it worked.  when I tried to put them in one loop last time, it didn't. So I thought it was because I was using two different libraries. Now, it's working fine as expected. You are awesome!!!! You deserve a 1000 kudos.