Yurii SoldakWifiNINA Driver
This package provides a driver to use a separate connected WiFi processor ESP32 for TCP/UDP communication.
The way this driver works is by using the SPI interface of your microcontroller to communicate with the WiFi chip using the Arduino SPI command set.
Using the WiFiNINA Driver
For information on how to use this driver, please take a look at the examples located in the examples/wifinina directory.
nina-fw Firmware
PLEASE NOTE: New Adafruit Boards with WiFi and Arduino Nano33 IoT boards most likely already have a recent version of the nina-fw firmware pre-installed. You should not need to install the firmware yourself.
In order to use this driver, you must have the nina-fw firmware installed on the ESP32 chip. If it is already installed, you can just use it. You do not need to flash the firmware again. The following instructions are only for those who want or need to update the firmware on your board.
Installing esptool to flash nina-fw firmware
In order to flash the firmware, you need to use Python to install the esptool package.
pip install esptool
Once you have installed esptool you can follow the correct procedure for flashing your board.
Updating nina-fw on the Arduino Nano33 IoT
In the updater directory we have a precompiled binary of the "passthrough" code you will need to flash first, in order to update the ESP32 co-processor on your board.
This is what needs to be done. There is also a bash script that performs the same steps also located in the updater directory.
mkdir -p ../build
# reset board into bootloader mode using 1200 baud
stty -F /dev/ttyACM0 ispeed 1200 ospeed 1200
# flash the passthru binary to the SAMD21 using bossac
# code from https://github.com/arduino-libraries/WiFiNINA/blob/master/examples/Tools/SerialNINAPassthrough/SerialNINAPassthrough.ino
bossac -d -i -e -w -v -R --port=/dev/ttyACM0 --offset=0x2000 ./SerialNINAPassthrough.ino.nano_33_iot.bin
# download the nina-fw binary
wget -P ../build/ https://github.com/arduino/nina-fw/releases/download/1.4.5/NINA_W102-v1.4.5.bin
# flash the nina-fw binary to the ESP32 using esptool
esptool --port /dev/ttyACM0 --before default_reset --baud 115200 write_flash 0 ../build/NINA_W102-v1.4.5.bin
You only need to do this one time, and then the correct nina-fw firmware will be on the NINA ESP32 chip, and you can just flash the Arduino Nano33 IoT board using TinyGo.
Updating Adafruit ESP32 WiFi Boards
Adafruit provides very good instructions for updating their boards that provide a ESP32 WiFi-BLE co-processor. For more information, please see: