suggestion for serial communication thermometer with ASCII commands (for teaching purposes)

[Minions]

The manual only comes with the purchased unit and is not as complete as what has already been provided in this thread.  There was quite a bit of trial and error in order to determine what worked and what did not work with this instrument.

[clappertown]

Hi, 

I tried serial monitor watching the output of CL3515R while communicating it using its own windows software. I did see the software sending commands, e.g., %001UC and %001P+000372 to the unit when I set 37.2C output in the software. I tried in python by opening the serial port and directly sending these commands to the unit but got no response. Have you tried communicating it by yourself?

[clappertown]

Ok, I figured out the problem was the serial port setting. It should be parity_even and 2 stop bit. Now it works...

[Minions]

Those are the only changes to the default connection settings.  You may also want to make sure that you have a timeout of at least 1 second.