I am putting together a pressure and temperature calibration system. We need to control an oven, a pressure pump, and also read data from a PICO 104 temperature logger, and a pressure standard as well as communicate with the product under test, which is a 3v3 serial interface.
while developing the code in Keysight VEE i had issues with the pico logger not being closed and had to pull the USB out and plug it back in again to get it to start again. On one occasion i did this and the serial communications to the product stopped working and have not returned.
I presume this is clash between the FTDI VI serial ports and the virtual serial port used by the pico logger.
I am about to strip the PC back to the bone and re-install everything, possibly re-install windows.
Anyone come across this before?