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My Teensy won't communicate via USB Serial

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TeensyUser edited this page Mar 21, 2020 · 2 revisions
  • Cables
    • Did you check your cable? There are a lot of charge only cables out there which have no communication lines. NOTE: good cables can go bad.
    • Teensy 4.x uses 480 Mbps USB unlike prior Teensys that work at 12 Mbps. So, cheap/bad cables which worked fine with a T3.x might fail with a T4.x.
  • Sketch
    • Did you wait for an established USB connection before sending data (see here for details)?

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