Teensy 4.1

Vendor: PJRC
Features: Ethernet, External Flash, USB, microSD
Source on GitHub: mimxrt/TEENSY41
More info: Website

Installation instructions

For deploying the firmware use the Teensy Loader tool provided by PJRC on their web site. PJRC provides both a graphical and command line version for Windows, OS X and Linux. With the command line version, run the command:

teensy_loader_cli --mcu=imxrt1062 -v -w TEENSY40-<date_version_tag>.hex

or for Teensy 4.1:

teensy_loader_cli --mcu=imxrt1062 -v -w TEENSY41-<date_version_tag>.hex

Instead of imxrt1062 with the --mcu option, you can as well use the board specific names TEENSY40, TEENSY41 or TEENSY_MICROMOD. When loading the firmware the PJRC boot loader will erase the board file system.

Note: If the Teensy board is equipped with Teensy bootloader v1.07 and up, the first attempt to upload the firmware may fail. In that case try again.



v1.23.0 (2024-06-02) .hex / [.bin] / [Release notes] (latest)
v1.22.2 (2024-02-22) .hex / [.bin] / [Release notes]
v1.22.1 (2024-01-05) .hex / [.bin] / [Release notes]
v1.22.0 (2023-12-27) .hex / [.bin] / [Release notes]
v1.21.0 (2023-10-05) .hex / [.bin] / [Release notes]
v1.20.0 (2023-04-26) .hex / [.bin] / [Release notes]
v1.19.1 (2022-06-18) .hex / [.bin] / [Release notes]
v1.18 (2022-01-17) .hex / [.bin] / [Release notes]
v1.17 (2021-09-02) .hex / [Release notes]

Preview builds

v1.24.0-preview.133.g7fe8f030e (2024-07-24) .hex / [.bin]
v1.24.0-preview.132.gba9853345 (2024-07-23) .hex / [.bin]
v1.24.0-preview.130.ge1ecc232d (2024-07-23) .hex / [.bin]
v1.24.0-preview.122.g390390ec3 (2024-07-23) .hex / [.bin]
v1.23.0-5.g3613ad962 (2024-05-31) .hex / [.bin]
(These are automatic builds of the development branch for the next release)