Hello AtomVM NIF

A tiny AtomVM NIF written in C, called from an Elixir app on ESP32-S3.

What’s in this repo

• nifs/
  ESP-IDF component that registers a NIF: Elixir.SampleApp.Hello:hello/0 (returns 1234).

• examples/hello_nif_elixir/
  Elixir app that calls SampleApp.Hello.hello/0 and prints the result.

How it works

1. Add (or symlink) this repo under AtomVM’s ESP32 components directory: AtomVM/src/platforms/esp32/components/

2. Build + flash AtomVM firmware with the component included.

3. Build the Elixir app (mix atomvm.packbeam) and flash the generated sample_app.avm.

Expected output

Starting application...
NIF said: 1234
Return value: ok

This repo is meant to be a minimal reference for “custom NIF in AtomVM firmware + call it from Elixir”.