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This firmware usesEspressif's IDF

1. Download the ESP32 toolchain

2. Extract it and add it to yourPATH:export PATH=$PATH:<path/to/toolchain>/bin

3. Clonev3.3.1 of the IDF:git clone --branch v3.3.1 --recursive https://github.com/espressif/esp-idf.git

4. Set theIDF_PATH environment variable:export IDF_PATH=<path/to/idf>

5. Runmake to build the firmware (in the directory of this read me). You may want to add different depending on the target board.

   1. RELEASE=1 make for MKR WiFi 1010 and Nano 33 IoT
   2. RELEASE=1 NANO_RP2040_CONNECT=1 make for Nano RP2040 connect
   3. RELEASE=1 UNO_WIFI_REV2=1 make for UNO WiFi Rev2

6. Load theTools -> SerialNINAPassthrough example sketch on to the board

7. Useesptool to flash the compiled firmware

If updating the NINA firmware for anArduino UNO WiFi Rev. 2 orArduino Nano RP2040 board viaSerialNINAPassthrough sketch, then theesptool invocation needs to be changed slightly:

-  --baud 115200 --before default_reset+  --baud 115200 --before no_reset

Themake command produces a bunch of binary files that must be flashed at very precise locations, makingesptool commandline quite complicated.Instead, once the firmware has been compiled, you can invokecombine.py script to produce a monolithic binary that can be flashed at 0x0.

makepython combine.py

This producesNINA_W102.bin file (a different name can be specified as parameter). To flash this file you can usehttps://arduino.github.io/arduino-fwuploader/2.2/usage/#firmware-flashing

git clone https://android.googlesource.com/platform/system/ca-certificatescp nina-fw/tools/nina-fw-create-roots.sh ca-certificates/filescd ca-certificates/files./nina-fw-create-roots.shcp roots.pem ../../nina-fw/data/roots.pem

cd tools./sslcheck.sh -c ../data/roots.pem -l url_lists/url_list_moz.com.txt -e

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This library is free software; you can redistribute it and/ormodify it under the terms of the GNU Lesser General PublicLicense as published by the Free Software Foundation; eitherversion 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 ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNULesser General Public License for more details.

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