Yes, but you have to check if it is 5V or 3.3V for both cable and device.
It is 5v both.
I bought an adapter cable and connected it to the PC, in the Device Manager section "Ports (COM & LPT)" driver created this text: "this is not prolific pl2303 contact supplier".
Turns out it is fake Chinese chip and the driver recognize that. After some searching I found old driver version from 2015 which works, (this driver people are using on Windows 11, because this USB serial converter chip PL2303TA with designation "TA" is not supported on Win 11 by manufacturer, but it works on Win 11 with this driver and it don't have the function to check if chip is not original), now in the Device Manager section "Ports (COM & LPT)" I see this:
Now I have no idea if it is working??? I pressed "SEND" button on Tenma thermometer and with the oscilloscope I can see that Tenma is sending data to the USB Serial adapter, but I have no idea if adapter is sending dada to the PC.
It is any way to check that?
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Update:
I think I got serial adapter working, it was some problems with the logic levels, I took apart adapter and desolder pull up resistor from RX input, now levels are ok.
About the functionality:
All functions, like start transmitting data and which data to transmit I can set on the thermometer itself, so thermometer not even need to receive any data (only commands it can receive is to start/stop transmitting).
What is needed is to somehow make TC to receive transmitted temperature values and correctly interpreter them.
Thermometer software recognize when thermometer is sending T1 temperature (probe 1 or channel 1), T2 temperature (probe 2 or channel 2), T1 minus T2 and Hi/Lo limits set on the devise for T1 and T2.
But thermometer can send only one temperature at the time, only T1 or T2 or T1 - T2.
So the thermometer is sending temperature values and designation of what channel it is T1, T2, or T1 - T2, plus Lo/Hi limit signals when in T1 or T2 mode (it also sending thermocouple type and probably the time H:M, which is counting at incorrect speed, but that is completely unimportant).