Raspberry Pi 2 setup

Some scratch notes on setting up the rpi2 for some docker-based experiments.

I got the one with an SD Card already flashed with the NOOBS software, so starting it up was pretty easy.

Make sure the power supply is 5V 2A. I happened to have an old Samsung one for some other device laying around, so I used that with the micro usb cable.

Started off with wired ethernet connection, did a sudo apt-get update and sudo apt-get upgrade for the raspbian OS that came on the card.

WIFI

Used a Tenda W311MI Wireless USB Adapter. After inserting it (and removing ethernet), then I used lsusb to confirm the device was visible.

Then in /etc/wpa_supplicant/wpa_supplicant.conf, added this to the bottom of the file:

network={
  ssid="YOUR_NETWORK_SSID"
  psk="YOUR_NETWORK_PASSWORD"
}

Then: sudo ifdown wlan0 && sudo ifup wlan0

These steps were found via this blog post.

Sound

I eventually want to use speakers connected to audio out to play sound, try a text to speech experiment.

• Switched to the audio out instead of HDMI

Headphones now work (a bit of noise on the line), but the desktop speakers do not. Forcing to HDMI does not seem to work, at least with those same speakers.

Docker SD card image

Now to prep an SD card for the rpi2 that is geared to just doing docker stuff. I used this link:

http://blog.hypriot.com/getting-started-with-docker-and-mac-on-the-raspberry-pi/

Used hypriot-rpi-20151115-132854.img.zip.

I used a secondary SD card instead of the one that had the NOOBS image, just in case I wanted to get back to it later.

Placed the SD card and booted up, connected to HDMI display. Plugged in ethernet after boot.

During boot, saw messages about cfg80211: Calling CRDA to update world regulatory domain, followed a recommendation here to do:

sudo apt-get install crda

but this failed with some "Could not resolve 'mirrordirector.raspbian.org'" errors, so skipping that for now. Will be using docker for new images anyway.

For wifi, had to create wpa_supplicant.conf and set it up with the network info.

Did a apt-get install make since the speakerbot project uses a make file.

Docker stuff

See speakerbot repo. Once got a Dockerfile set up:

docker build -t speakerbot .

docker run -it speakerbot

Node for rpi2:

• eliperelman: arm7 download from https://nodejs.org/en/download/
• tbranyen: arch linux via pacman
• eliperelman: Nodesource installer for Raspian (Debian) works well too: https://nodejs.org/en/download/package-manager/

Unix commands

For shutdown: sudo poweroff For restart: sudo reboot