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Adafruit fork of the Arduino NINA-W102 firmware

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This is the Adafruit fork of the Arduino NINA-W102 firmware. The original repository is located at

This firmware uses Espressif's IDF

Contributing to nina-fw

Please be aware that by contributing to this project you are agreeing to the Code of Conduct. Contributors who follow the Code of Conduct are welcome to submit pull requests and they will be promptly reviewed by project admins. Please join the Discord too.

The NINA firmware version needs to be updated in four places in this repo:

  1. CommandHandler.cpp
  3. Makefile


The firmware shipped in Adafruit's products is compiled following these instructions. These may differ from the instructions included in the original Arduino firmware repository.

  1. Download the ESP32 toolchain
  2. Extract it and add it to your PATH: export PATH=$PATH:<path/to/toolchain>/bin
  3. Clone v3.3.1 of the IDF: git clone --branch v3.3.1 --recursive
  4. Set the IDF_PATH environment variable: export IDF_PATH=<path/to/idf>
  5. Run make firmware to build the firmware (in the directory of this read me)
  6. You should have a file named NINA_W102-x.x.x.bin in the top directory
  7. Use appropriate tools (, appropriate pass-through firmware etc) to load this binary file onto your board. a. If you do not know how to do this, we have an excellent guide on the Adafruit Learning System for upgrading your ESP32's firmware


Copyright (c) 2018 Arduino SA. All rights reserved.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA


Firmware for u-blox NINA W102 WiFi/BT module


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