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Thread: Processing + Teensy 4.0 - Serial, reprogramming issue.

  1. #1

    Processing + Teensy 4.0 - Serial, reprogramming issue.

    Please forgive me if this is an obvious issue that I should understand by now considering I have been working with teensy and arduino since teensy 2 came out.

    I am designing a led project around Teensy 4.0 which includes a bunch of led strips. I have cats, and they love to chase those moving lights! lol
    So I have created a virtual led visualizer in Processing that basically grabs the frames via serial, and it works great. Only issue is in order to reprogram the Teensy 4.0 I need to close the processing application down which is really irritating and slows down the development process.

    This is the error I get when I try to reprogram the sketch onto Teensy 4 while Processing app visualizer is running (Which is receiving and sending serial)
    "Unable to open /dev/cu.usbmodem67022801 for reboot request
    Teensy did not respond to a USB-based request to enter program mode.
    Please press the PROGRAM MODE BUTTON on your Teensy to upload your sketch.
    An error occurred while uploading the sketch"

    I know this is an issue from using the native serial ports on Teensy. Is there a simple solution around this"? Preferably bot having to use another microcontroller as a serial bridge?

  2. #2
    Teensy4 has multiple Serial, You may use another Serial say Serial1 for your App visualizer and use Native USB Serial interface for programming purpose.

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