SparkFun Forums 

Where electronics enthusiasts find answers.

Discussions about processor boards have here!
User avatar
By glenredford
Just got a brand new Teensy 4.0 and 4.1. When I plug in the USB, "blink" runs and the LED flashes, but no comm port shows up. Pushing the button gives a blinking red LED ("no usb"?). On the same PC my UNO R3 works fine. A Teensy 4.1 has worked on this PC before (but I gave it away!). Tried:

several different USB cables (5)
several different PCs (3)
installing FTDI

still no comm port. Any hints?
User avatar
By YellowDog
I could be wrong but if I recall correctly Teensy 4.x won't generate a COM port unless it's running code that calls for one. Have you tried uploading code with the teensy loader application?
 Topic permissions

You can post new topics in this forum
You can reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum