N2K Backpack

An ESP32 powered N2K wifi client, designed to broadcast a wifi NMEA source to displays or other devices.

Installing

Requires micropython to install to an esp32:

Install latest Python 3.x e.g

echo "python 3.9.7" > .tool-versions
asdf install

Install esptool

pip install esptool
Download latest micropython kernel from: https://github.com/micropython/micropython/releases
Use esptool.py to program the esp32.
- On the first time use:
  
  esptool.py --chip esp32 --port /dev/ttyUSB0 erase_flash
- After that program the firmware starting at address 0x1000:
  
  esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 460800 write_flash -z 0x1000 esp32-20190125-v1.10.bin
  
  Firmware is provided using either ESP-IDF v3.x or v4.x. If in doubt use v4.x.