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Thread: Upload sketch to teensy via serial1 or any input besides the main input.

  1. #1
    Junior Member
    Join Date
    Aug 2017

    Upload sketch to teensy via serial1 or any input besides the main input.

    Is is possible to upload sketches, compiled code, or hex files to a teensy 3.2 via any input besides the designated input?

  2. #2
    Senior Member+ defragster's Avatar
    Join Date
    Feb 2015
    PJRC and the Teensy as shipped with bootloader on 2nd processor only support upload over the USB cable.

    There are posts { note dangers } around of others directly writing code to flash - but no supported alternative.

  3. #3
    Junior Member
    Join Date
    Dec 2015
    I have the same issue: programming Teensy 3.2s on the field (connected over CAN bus) without having to walk/climb etc. to each of them. OK, I understand, programming over the CAN bus is not a supported option, but:
    Could anybody suggest a bluetooth or any kind of radio bridge solution that would replace the usb cable without the two devices at the ends noticing it?

  4. #4
    Senior Member Epyon's Avatar
    Join Date
    Apr 2013
    Search the forum for 'Teensy OTA'. There are some makeshift solutions available, but non really recommended for production.

    My solution is to combine them with a Linux SBC, e.g. the very compact $9 NanoPi Neo, and use Teensy CLI through SSH to reflash the Teensy. This is probably something that could be automated through some shell scripting for larger deployments.

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