Skip to content

Latest commit

 

History

History
31 lines (17 loc) · 1.97 KB

README.md

File metadata and controls

31 lines (17 loc) · 1.97 KB
Raw

Wifi

Wraps up Nerves.Network to conveniently provide WiFi. It provides the following services:

Connecting to the configured WiFi

The GenServer WiFi.NetworkWrapper starts the WiFi on startup and attempts to connect to that configured. This initial WiFi configuration needs to be done before creating your firmware image and can be done by

  1. Copying ./config/config.secret.example.exs to ./config/config.secret.exs
  2. Editing ./config/config.secret.exs to fill in you WiFi details.

Changing the WiFi details

Having to create a new firmware image just to change WiFi is (was) a royal pain, so this appliation supports not doing that:

  1. Connect to your (presumably) Pi. You can use with a keyboard with monitor but it's often easier to connect with Screen over USB: connect your PI's USB and `ls /dev/tty*. Note that one USB input on the Pi Zero is power-only; use the one on the outside to connect. Also many USB cables are for charging only; use one that is known to also support data.
  2. Wait a few seconds, and connect to the device that just appeared. (It's /dev/tty.usb[some number] on my MacBook Pro) like this: screen /dev/tty.usb<device> 115200. (for more details see the Nerves FAQ)
  3. Once connected you are on an Elixir prompt so you can run Wifi.set("your ssid", "your secret").

That's it. See lib/wifi.ex for more details.

Now this may be redundant with System.Registry - but ...

Knowing Wifi is set

Until Wifi is set, Nerves Networking is super chatty at Log level info so that's a clue. The logs scrolling past, when connected over screen (or picocom) will tell you what's going on.

Setting the time

Wifi.Ntp will use ntp to set the system time, once there is an Internet connection. This will bring your system out of the 1970s.