But still no joy when I try to write data to the USB serial port, it seems stacked or in timeout. The upgrade to Parallels desktop version 17.1.1 partially solved the issue, because I am now able to read data at USB serial port. The serial communication seems to be stacked, even if the Teensy 4.0 is recognized by Windows OS and I am able to program the board using Arduino IDE, which is weird. The Raspberry Pi is a very cheap computer that runs Linux, but it also provides a set of GPIO (general purpose input/output) pins, allowing you to control. My setup is: MacOS Monterey 12.0.1, Win 10 OS and upgrade to Parallels desktop version 17.1.1, the new release available here If you want to do it all in the terminal, open the download directory and use tar -zxvf arduino-1.8.16-linu圆4.tar.gz - though that command will obviously change when the version changes. But I'm quite sure this difference is not relevant for the issue we are encountered. Teens 4.0 is recognized as a COM port (Windows) or serial device (Mac, Linux). This board does not use FTDI chip for serial communication, the micro has an embedded USB peripheral. I am trying to use Teensy 4.0 dev board using Arduino IDE. I played in the past with Arduino / ESP32 esptool.py and I agree with you it seems a parallels/mac/usb virtualization problem. Hi l3xh2k, I guess we have a similar issue.
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