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Install teensy_loader_cli with Homebrew, apt, Nix, pacman

Command-line integration for Teensy USB development boards. Version 2.3 via Homebrew; verified from local package data. Also installable with debian: sudo apt install teensy-loader-cli.

Install commandSecurity notes

install

Additional install commands

macOS

Homebrewverified · 100%
brew install teensy_loader_cli

local Homebrew formula metadata

Linux

Debian aptverified · 92%
sudo apt install teensy-loader-cli

Debian stable package indexes · teensy-loader-cli · source: deb.debian.org

Nixverified · 92%
nix profile install nixpkgs#teensy-loader-cli

nixpkgs package indexes · pkgs/by-name/te/teensy-loader-cli/package.nix · source: api.github.com

Arch Linux pacmanverified · 92%
sudo pacman -S teensy_loader_cli

Arch Linux sync databases · teensy_loader_cli · source: geo.mirror.pkgbuild.com

overview

Package summary

Command-line integration for Teensy USB development boards

Commands and aliases

  • teensy_loader_cli

history

Project history and usage

Teensy Loader CLI is the command-line loader for PJRC Teensy development boards. It exists for advanced users who want to automate firmware programming from Makefiles, scripts, CI jobs, or other non-GUI workflows.

Project history

PJRC documents the CLI as the command-line counterpart to the graphical Teensy Loader. The official page says it is for advanced users who want to automate programming, typically with a Makefile, while the GUI in automatic mode is easier for most use.

The README and PJRC page preserve an older cross-platform development history: version 2.0 was tested on Ubuntu 9.04, Mac OS X 10.5, Windows XP, FreeBSD 8.0, OpenBSD snapshots, and NetBSD 5.0.1. Later version 2.1 added Teensy 3.5 and 3.6 support and Windows support for all Teensy boards, while the Git tags show releases through 2.3.

Adoption history

The tool was adopted by embedded developers who needed to flash Teensy boards without opening the desktop loader. Its package-manager presence matters because headless or scripted development environments need a reliable `teensy_loader_cli` binary plus platform setup such as Linux udev rules.

The README also records automation patterns beyond local Makefiles, including a hard reboot option using a second Teensy and a note that PlatformIO includes support for loading via `teensy_loader`.

How it is used

Typical usage is invoking `teensy_loader_cli --mcu=<target> -w firmware.hex` after building a `.hex` file. Users select the target MCU or logical Teensy board, optionally wait for a board to appear, reboot or avoid rebooting, and use verbose output for troubleshooting.

Package users care because it turns physical board programming into a scriptable post-build step. It is especially useful for command-line-only setups, repeatable firmware workflows, and build systems that already know the board's MCU name.

Why package nerds care

Teensy Loader CLI is a small but important hardware-adjacent package: it bridges package-managed build tools and an actual USB bootloader. Its significance is not breadth but reliability at the final step of embedded development, where a script must put bytes onto a board.

Timeline

  • 2010: Version 2.0-era documentation lists testing on Ubuntu 9.04, Mac OS X 10.5, Windows XP, FreeBSD 8.0, OpenBSD, and NetBSD.
  • Version 2.1: Added Teensy 3.5 and 3.6 support plus Windows support for all Teensy boards.
  • Version 2.3: Latest tag shown in the official Git repository.

Related projects

  • Related projects include Teensyduino, the graphical Teensy Loader, PlatformIO, AVR/ARM Makefile workflows, and PJRC Teensy hardware boards.

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

  • narrow executable package without higher-risk signals

Signals

  • metadata:no-higher-risk-signals

Install behavior

  • No Homebrew bottle metadata was recorded.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

CommandKindExposureNote
teensy_loader_cliexecutableindexed executableDiscovered from the local executable index.

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-08-03
manager version2.3
manager updated
local dataunknown
upstreamnot available
latest detectednot detected
  • okNo freshness warnings were generated.

install metadata

Package metadata

Package keybrew:teensy_loader_cli
Version2.3
Package managerHomebrew
Homepagehttps://www.pjrc.com/teensy/loader_cli.html
Repositoryhttps://github.com/PaulStoffregen/teensy_loader_cli
Bottlenot recorded
Servicenone declared

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Debian apt95%

teensy-loader-cli 2.2-1.1

load and run programs onto your Teensy micro controller

https://www.pjrc.com/teensy/loader_cli.html

sudo apt install teensy-loader-cli
  • Section: devel
  • Architecture: amd64
  • 2 dependencies
  • normalized package name match
  • Matched by: Teensy Loader Cli
Debian stable package indexes · deb.debian.org · Debian stable package indexes: teensy-loader-cli from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Nix95%

teensy-loader-cli

nix profile install nixpkgs#teensy-loader-cli
  • normalized package name match
  • Matched by: Teensy Loader Cli
nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/te/teensy-loader-cli/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
Ubuntu apt95%

teensy-loader-cli 2.2-1

load and run programs onto your Teensy micro controller

https://www.pjrc.com/teensy/loader_cli.html

sudo apt install teensy-loader-cli
  • Section: universe/devel
  • Architecture: amd64
  • 2 dependencies
  • normalized package name match
  • Matched by: Teensy Loader Cli
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: teensy-loader-cli from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz
pacman95%

teensy_loader_cli 2.3-1

Command line loader for the teensy microprocessor boards

https://www.pjrc.com/teensy/loader_cli.html

sudo pacman -S teensy_loader_cli
  • License: GPL-3.0-only
  • Architecture: x86_64
  • 1 dependencies
  • 1 provides
  • normalized package name match
  • Matched by: Teensy Loader Cli
Arch Linux sync databases · geo.mirror.pkgbuild.com · Arch Linux sync databases: teensy_loader_cli from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Used sources

  • Geiger risk classifier
  • cross-ecosystem install command graph
  • curated package history
  • external package-manager database matches
  • pkg.so package database
  • pkgdb category and tag curation