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padelt / temper-python

libusb/PyUSB-based driver to read TEMPer USB HID devices (USB ID 0c45:7401) and serve as a NetSNMP passpersist module
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New sensor type TEMPer2_M12_V1.3 #139

Open safrye opened 2 months ago

safrye commented 2 months ago

Hi, I got the warning about a new sensor type: WARNING:temperusb.temper:Unrecognised sensor type 'TEMPer2_M12_V1.3'. Trying to guess communication format. Please add the configuration to 'device_library.py' and submit to https://github.com/padelt/temper-python/issues to benefit other users. Lsusb showed: Bus 003 Device 002: ID 0c45:7401 Microdia TEMPer Temperature Sensor This is a metal body TEMPer2 with a TXT button.

Cheers.

davet2001 commented 2 months ago

Thanks @safrye! Did it connect ok and give a valid temperature reading?

safrye commented 2 months ago

It connected fine after I installed the USB permission and gave valid reading. Interestingly, also the old pcsensor program did not work before I installed the permissions, which was also the reason why I looked for a newer version. I use OpenSuse Tumbleweed and at least a year ago pcsensor didn't complain about not finding the device. Just to be complete here also the output of the TXT feature, without the external probe:

www.pcsensor.com
  type:fm75
   caps lock:on/off/++ fw:1.3
    num lock:Off/on/--  
    date    time    c   c   interval
            inside  outside
                    25.50   err 1
                            25.50   err 1
                                    25.63   err 1

Cheers and Thanks for the nice program.

P.S.: I recognized that temper-python only gives one decimal place for the temperature while pcsensor gives two. Any special reason for this?

davet2001 commented 2 months ago

@safrye Regarding the 1decimal place output, this is just how the output is formatted in the statement that prints the number to the screen, e.g. https://github.com/padelt/temper-python/blob/67d544dcf1bfa46726f88fe3cba2936cf7842029/temperusb/cli.py#L82

If you want more decimal places, you could import the library, create a TemperDevice() instance, then call get_temperature(). This will return a floating point value.

But do bear in mind the finite resolution, noise, measurement uncertainty and calibration error of these sensors if looking at the second decimal point.