Library to read from the HC_SR04 ultrasonic distance sensor in an Elixir Nerves project.
You always need to set the correct target first, so the C files are cross-compiled with the correct target.
Add the dependency { :nerves_hcsr04, "~> 0.1.3" } to your mix.exs, then run mix deps.get && mix deps.compile.
Afterwards build and upload the firmware to the device.
More detailed usage instructions are in the file lib/nerves_hcsr04.ex as code comments.