# Raspian

- Latest Jessie Light : https://downloads.raspberrypi.org/raspbian_lite_latest
- default login/pass : pi/raspberry
- Minibian : https://minibianpi.wordpress.com/features
- expand filsystem : `sudo resize2fs /dev/mmcblk0p2`
 
# JavaScript

- clean nvm setup : https://www.losant.com/blog/how-to-install-nodejs-on-raspberry-pi
- johnny-five : http://johnny-five.io/
- raspi-io pin infos : https://github.com/nebrius/raspi-io/wiki/Pin-Information
- NodeJS home automation framework https://pimatic.org/

# Audio

```sh
apt-get install alsa-utils
modprobe snd_bcm2835
amixer cset numid=3 1
amixer sset PCM,0 90%
```

add dtparam=audio=on to /boot/config.txt
add snd_bcm2835 to /etc/modules
numid: 0=auto, 1=headphones, 2=hdmi.

# Pinout

![](https://i.stack.imgur.com/RILry.png)

# CLI

Useful commands for OSX

## SD cards

#### write image

see disks : `diskutil list`

:warning: careful with the DISK parameter, it wipes the disk

```sh
IMAGE=/path/to/image.img
DISK=/dev/rdisk3
sudo dd if=$IMAGE of=$DISK bs=8m
```

also : `unzip -p sdcard.img.zip | sudo dd bs=1m of=<device>`

or use `./prepare-disk.sh /path/to/image.img`

- expand filsystem : `sudo resize2fs /dev/mmcblk0p2`

#### backup image

use `./backup-disk.sh

## network 

detect your rpi on the network : `sudo nmap -sS 192.168.0.1/24`

## GPIO
```sh
apt-get install wiringpi
gpio mode 7 out
gpio write 7 1
gpio write 7 0
```

## create a WiFi access point

https://frillip.com/using-your-raspberry-pi-3-as-a-wifi-access-point-with-hostapd/