TODO: Add description In my project, I have:

• Ultrasonic sensor TRIG on GPIO25, it needs a 10uS pulse to activate.
• Ultrasonic sensor ECHO on GPIO21, thats the :input pin.

How to run:

{trig, echo} = HelloNerves.UV.open()
pid = HelloNerves.UV.spawn_receiver(echo)
HelloNerves.UV.pulse()

Nerves applications produce images for hardware targets based on the MIX_TARGET environment variable. If MIX_TARGET is unset, mix builds an image that runs on the host (e.g., your laptop). This is useful for executing logic tests, running utilities, and debugging. Other targets are represented by a short name like rpi3 that maps to a Nerves system image for that platform. All of this logic is in the generated mix.exs and may be customized. For more information about targets see:

https://hexdocs.pm/nerves/supported-targets.html

To start your Nerves app:

• export MIX_TARGET=my_target or prefix every command with MIX_TARGET=my_target. For example, MIX_TARGET=rpi3
• Install dependencies with mix deps.get
• Create firmware with mix firmware
• Burn to an SD card with mix burn

For the Raspberry Pi Zero 2W, use the rpi3a target:

1. Install dependencies (only needed once):

   MIX_TARGET=rpi3a mix deps.get

2. Compile the project:

   MIX_TARGET=rpi3a mix compile

3. Build the firmware:

   MIX_TARGET=rpi3a mix firmware

4. Deploy to SD card or device:

   # For initial burn to SD card:
   MIX_TARGET=rpi3a mix burn
   
   # For updates over network:
   MIX_TARGET=rpi3a mix upload

Note: Always include MIX_TARGET=rpi3a before each command to ensure you're building for the correct target.

• Official docs: https://hexdocs.pm/nerves/getting-started.html
• Official website: https://nerves-project.org/
• Forum: https://elixirforum.com/c/nerves-forum
• Elixir Slack #nerves channel: https://elixir-slack.community/
• Elixir Discord #nerves channel: https://discord.gg/elixir
• Source: https://github.com/nerves-project/nerves