02 Raspberry Pi Zero W.md

# Raspberry Pi Zero W

In this lab you will be configuring a Raspberry Pi Zero as a Bluetooth iBeacon.

Start by installing the [Raspbian Stretch Lite](https://www.raspberrypi.org/downloads/raspbian/) image and installing it on the SD card. Before we plug it into the Raspberry Pi we need to configure the network and enable ssh. Eject the SD card from your computer then plug in back in again to access the `boot` partition.

Create a file called `wpa_supplicant.conf` and insert the following code, subsitituting the SSID and password for your wireless network:

```
country=GB
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
       ssid="SSID"
       psk="PASSWORD"
       key_mgmt=WPA-PSK
    }
```

SSH is disabled by default, to enable this create a blank text file in the `boot` partition called `ssh`. If you eject the SD card you need to insert it into the RPi and boot it up. It will have the network name `raspberrypi`. You should be able to ssh using the username of `pi` and the password `raspberry`.

Once in you need to change the permissions to allow non-root users to use the `hcitool` and `hciconfig` commands.

```
sudo setcap 'cap_net_raw,cap_net_admin+eip' `which hcitool`
sudo setcap 'cap_net_raw,cap_net_admin+eip' `which hciconfig`
```

To set up the device as an iBeacon you should use the `PiBeacon.sh` shell script you will find in the `exercises/` directory, passing it your SSID, major and minor.

```
./PIBeacon.sh DCEF54A2-31EB-467F-AF8E-350FB641C97D 99 0
```

https://medium.com/@aallan/setting-up-a-headless-raspberry-pi-zero-3ded0b83f274

https://bbs.archlinux.org/viewtopic.php?id=215080

https://github.coventry.ac.uk/leej64/PIBeacon


# Camera

interfacing options to enable camera.

Simple shell script to take a photo:

```shell
#!/bin/bash

mkdir -p timelapse
raspistill -o timelapse/$(date +%Y%m%d-%H%M%S).jpg
```

Set up a crontab to run every 5 min, start by editing the crontab with `crontab -e`. Add the following line:

```

```

Tnen restart the crontab:

```shell
sudo systemctl restart cron
```

From a local machine, sync the photos:

```
mkdir -p timelapse
rsync -avzh USERNAME@HOSTNAME:/home/USERNAME/timelapse/* ~/Downloads/timelapse/
```