schrockwell/metar_map_nerves

METAR map visualization driven by a Raspberry Pi and WS281x LEDs

🗺 METAR Map

This is a Nerves project to display the weather conditions at local airports using LEDs. Here's a photo gallery.

It was designed to run on a Raspberry Pi Zero W with a string of WS2811 LEDs.

Prerequisites

• asdf installs of:
  • Elixir 1.13.1
  • Erlang 24.1.7
• Nerves installation
• direnv (optional)

Building the firmware

1. Copy an existing map config file, e.g. config/maps/ny_rpi0.exs, and modify.

2. Copy .envrc-example to .envrc and modify the environment variables.

3. Set up the environment.

   direnv allow
   brew install fwup squashfs coreutils xz pkg-config
   asdf install
   mix archive.install hex nerves_bootstrap 1.11.5
   mix deps.get

4. Build and upload the firmware.

   mix firmware
   
   # Burn to an SD card
   mix burn
   
   # -OR- upload to an existing Pi
   mix upload metar-map.local

Testing locally on the host machine

MIX_TARGET=host iex -S mix phx.server