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Serial read only works in highlight execution mode

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Hi,

i am trying to read data from a Extech Rh520 temperature data logger. i can only get it working in highlight execution mode, i get that this is most likely a timing issue but i just cant figure it out.  i have created the most simplest version of the VI (attached) could someone please take a look and point me in the right direction.  i have tried putting delays everywhere and just cant get it to work.

just a bit of background info, this is a data logger and you can only download the data in one go.  To initiate this download you have to take DTR low then just read the data until it stops. it's at the point where DTR is taken low that doesn't work in full speed it doesn't read any data.

 

Thanks in advance for any help i receive.


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