Bytes at serial port are unreadable?

[Carl Feller]

I am trying to communicate to an Omega HH42 Digital Thermometer. I receive Bytes at the port but they do not show up in the display. I have tried the codes disply, Hex etc..... Has anyone seen this before? I am not new to serial communication but this has me stumped.

[Brian_Beal]

I have seen this before. It reads bytes at the port, but nothing displays. I believe that I fixed it by changing the termination character with the port set-up VI. You can experiment with different characters, or tell it not to use termination characters.

[Carl Feller]

Thanks Brian! 🙂 I found a combination of Termination characters and timing of Writes and reads that seems to have done the trick.

[LindsWaite]

Hey Carl,

I'm trying to serially communicate with the HH42 as well.

Do you still know what combination of timing and termination characters that you had to use to read temperature?

Thanks

[Carl Feller]

If memory serves me correctly I used "DA" for the termination and I put in 1 second delays before I did any writing or reading.

You can probably shorten the delay if you need a faster response.