wsmoak / nerves-examples

A couple small examples to demonstrate using Nerves

Nerves Examples

Here are couple simple nerves examples. All of these projects should work on the following platforms:

• Raspberry Pi A+/B+
• Raspberry Pi 2 B
• Raspberry Pi Zero
• Beaglebone Black
• Lego EV3

For detailed information on how to build an example, see the README.md in each application's root directory.

blinky

"Hello World" for the embedded world... and a little more

• Boots to Elixir shell and blinks LEDs forever in background
• Uses Nerves.LED to manage named LEDs
• Custom per-target configuration via config/#{target}.exs
• Builds off-target with debug output via Logger

hello_network

Brings up network, makes it discoverable

• Uses Nerves.Networking to configure DHCP with ipv4LL fallback
• Demonstrates using Nerves.SSDP.Server for discovery via cell list

Configuring Build Environment

The examples currently support Raspberry Pi (rpi), Raspberry Pi 2 (rpi2), and Beaglebone Black (bbb) targets.

The following instructions assume rpi2, but you can substitute any of the supported target IDs below.

On OS X:

brew update
brew upgrade elixir   ## v1.2.4, BUT NOT HEAD!!
brew install coreutils fwup squashfs

On All Platforms:

mix local.hex # update hex
mix archive.install https://github.com/nerves-project/archives/raw/master/nerves_bootstrap.ez

Building with Mix

Note that NERVES_TARGET environment can set the platform you get. See mix.exs for the example to see how this works.

cd <example-project>
git pull
mix deps.get
mix firmware

Burning Using Mix

$ mix firmware.burn

Burning with fwup

$ fwup -a -i _images/rpi2/blinky.fw -t complete