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.



v1.20.0 (2023-04-26) .hex [.bin] [Release notes] (latest)
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]

Nightly builds

v1.20.0-489-ga3862e726 (2023-09-20) .hex [.bin]
v1.20.0-488-gfa6852396 (2023-09-20) .hex [.bin]
v1.20.0-487-g00930b213 (2023-09-18) .hex [.bin]
v1.20.0-486-gb0e03b3e0 (2023-09-18) .hex [.bin]