Teensy 3.0


Platform Teensy: Teensy is a complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects. All programming is done via the USB port. No special programmer is needed, only a standard USB cable and a PC or Macintosh with a USB port.

Microcontroller MK20DX128
Frequency 48MHz
Flash 128KB
Vendor Teensy


Please use teensy30 ID for board option in “platformio.ini” (Project Configuration File):

platform = teensy
board = teensy30

You can override default Teensy 3.0 settings per build environment using board_*** option, where *** is a JSON object path from board manifest teensy30.json. For example, board_build.mcu, board_build.f_cpu, etc.

platform = teensy
board = teensy30

; change microcontroller
board_build.mcu = mk20dx128

; change MCU frequency
board_build.f_cpu = 48000000L


Teensy 3.0 supports the next uploading protocols:

  • teensy-cli
  • teensy-gui

Default protocol is teensy-gui

You can change upload protocol using upload_protocol option:

platform = teensy
board = teensy30

upload_protocol = teensy-gui


PIO Unified Debugger currently does not support Teensy 3.0 board.


Name Description
Arduino Arduino Wiring-based Framework allows writing cross-platform software to control devices attached to a wide range of Arduino boards to create all kinds of creative coding, interactive objects, spaces or physical experiences.