Program to fetch datas from YC-7x7 dataloggers from YCT

We needed a datalogger, we found one. But the supplied VB6 program was very crappy, really unusable, even on old XP machines. So I did mine, able to run under windows and linux. All the fun was to reverse the (binary) RS232 protocol. Our is a YC-727D with 2 thermocouple inputs, but the protocol is the same for 1, 2, 3 or 4 inputs models (YC-717, YC-727, YC-737, YC-747). Bytes orders needs to be checked for 3th and 4nd channels tough.

Our datalogger is using a easy to build non-standard serial cable:

[male 3.5mm stereo jack]              [female DE-9]
         Tip  ---- PC to datalogger ----- Pin 3
        Ring  ---- Datalogger to PC ----- Pin 2
       Sleeve -------- Ground ----------- Pin 5


                         ----------
        ----------------/          \
       /  T |   R |   S |           |---------//
       \    |     |     |           |---------//
        ----------------\          /
                         ----------
          3     2     5
         RX    TX    GND