FTDI Chip develops innovative silicon solutions that enhance interaction with today’s technology. When a designer needs to add a USB port, rest assured that FTDI Chip has a full range of USB solutions to get the job done. Official reference can be found here.


You can configure debugging tool using debug_tool option in “platformio.ini” (Project Configuration File):

platform = ...
board = ...
debug_tool = ftdi

If you would like to use this tool for firmware uploading, please change upload protocol:

platform = ...
board = ...
debug_tool = ftdi
upload_protocol = ftdi

More options:



macOS contains default FTDIUSBSerialDriver driver which conflicts with debug tools which are based on this chip. FTDI Chip company recommends removing this default driver from a system. Everything should work after system rebooting. See detailed instruction in official application note (Page 16, Section 4: Uninstalling FTDI Drivers on OS X) AN134: FTDI Drivers Installation guide for MAC OS X


Please install “udev” rules 99-platformio-udev.rules. If you already installed them before, please check that your rules are up-to-date or repeat steps.


Name Description
Espressif 32 Espressif Systems is a privately held fabless semiconductor company. They provide wireless communications and Wi-Fi chips which are widely used in mobile devices and the Internet of Things applications.
RISC-V GAP GreenWaves GAP8 IoT application processor enables the cost-effective development, deployment and autonomous operation of intelligent sensing devices that capture, analyze, classify and act on the fusion of rich data sources such as images, sounds or vibrations.
Shakti Shakti is an open-source initiative by the RISE group at IIT-Madras, which is not only building open source, production grade processors, but also associated components like interconnect fabrics, verification tools, storage controllers, peripheral IPs and SOC tools.
SiFive SiFive brings the power of open source and software automation to the semiconductor industry, making it possible to develop new hardware faster and more affordably than ever before.


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
Espressif IoT Development Framework ESP-IDF is the official development framework for the ESP32 and ESP32-S Series SoCs.
FreeRTOS FreeRTOS is a real-time operating system kernel for embedded devices that has been ported to 40 microcontroller platforms
Freedom E SDK Open Source Software for Developing on the SiFive Freedom E Platform
Mbed Arm Mbed OS is an open source embedded operating system designed specifically for the ‘things’ in the Internet of Things. It includes all the features you need to develop a connected product based on an Arm Cortex-M microcontroller, including security, connectivity, an RTOS and drivers for sensors and I/O devices
PULP OS PULP is a silicon-proven Parallel Ultra Low Power platform targeting high energy efficiencies. The platform is organized in clusters of RISC-V cores that share a tightly-coupled data memory
Shakti SDK A software development kit for developing applications on Shakti class of processors
Simba Simba is an RTOS and build framework with aims to make embedded programming easy and portable
Zephyr RTOS The Zephyr Project is a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource constrained devices, and built with safety and security in mind



For more detailed board information please scroll tables below by horizontal.

Name Platform Debug MCU Frequency Flash RAM
Artix-7 35T Arty FPGA Evaluation Kit Shakti On-board E-CLASS 50MHz 0B 128KB
Arty A7-100: Artix-7 FPGA Development Board Shakti On-board C-CLASS 50MHz 0B 128MB
Arty FPGA Dev Kit SiFive On-board FE310 450MHz 16MB 256MB
Espressif ESP-WROVER-KIT Espressif 32 On-board ESP32 240MHz 4MB 320KB
GAPuino GAP8 RISC-V GAP On-board GAP8 250MHz 64MB 8MB
HiFive Unleashed SiFive On-board FU540 1500MHz 32MB 8GB
HiFive1 SiFive On-board FE310 320MHz 16MB 16KB
Parashu on Artix-7 100T Arty FPGA Evaluation Kit Shakti On-board E-CLASS 50MHz 0B 128KB
Pinaka on Artix-7 35T Arty FPGA Evaluation Kit Shakti On-board E-CLASS 50MHz 0B 128KB
Vajra on Arty A7-100: Artix-7 FPGA Development Board Shakti On-board C-CLASS 50MHz 0B 128MB