ansible-pi

Quickly setup your Raspberry Pi - particularly WIFI settings and NodeRED.

Requirements

Hardware

1. A Raspberry Pi w/ associated power supply and SD card. 8GB recommended but 4GB should work.
2. USB wifi adaptor. I recommend the TL-WN722N V2

Software

1. Ansible is required. The offical docs suggest using pip. I used Homebrew brew install ansible
2. Add an entry to your ~/.ssh/config file

Host anewpi
    Hostname raspberrypi.local
    User pi
    StrictHostKeyChecking no

3. Add entry to your ~/.ansible.cfg file

[defaults]
host_key_checking = False

Installation

1. Clone and setup the ansible script.

git clone https://github.com/chrowe/ansible-pi.git
cd ansible-pi
cp hosts.example hosts
cp wpa_supplicant.conf.example wpa_supplicant.conf

2. Edit the wpa_supplicant.conf

• Replace your_wifi_sid with the name of your wifi network
• Replace your_wifi_password with the password for your wifi network

Note: You can ping raspberrypi.local if you want to get the IP address of your pi.

Usage

Setting up an new Pi

1. Create new sd card

• I use Etcher w/ latest Raspian lite
• touch /Volumes/boot/ssh //Enables ssh

2. Configure ssh and hostname so Ansible can connect

• Run ./scripts/anewpi.sh to login to the new pi.
• Connect Pi to the network and power it up.
  • Note: If you get a message paramiko: The authenticity of host 'raspberrypi.local' can't be established. just type yes and hit enter to continue.
• Note: You should now be logged into the Pi
• Run sudo raspi-config and choose "2 Hostname" to set a new hostname for your Pi. You will be prompted to reboot.
• Add the new hostname to hosts. for example

  [newname]
  newhostname.local
  

• Test that everything is working
  • ssh ssh pi@newhostname.local
  • ansible ``

3. Set up Pagekite

   • cp pagekite_10_account.rc.example pagekite_10_account.rc
   • Change NAME and YOURSECRET to your desired values. See https://pagekite.net/home/

4. Run Ansible to setup everything else

• In playbook.yml change hosts to match the newname you just gave your Pi.
• ansible-playbook -i hosts playbook.yml

Using Pagekite

See http://pagekite.net/wiki/Howto/SshOverPageKite/ for how to set up ssh on your local machine.

Accessing NodeRED

View http://[newname]:1880/# to see Node Red

Using 1wire in NodeRED

1. Hamburger menu > Manage Palette > Install
2. Search for "1wire" and install node-red-contrib-1wire
3. ls /sys/bus/w1/devices/ | grep 28 should show you any devices you have connected

History

• Based on https://github.com/motdotla/ansible-pi
• Inspiration
  • https://opensource.com/life/16/2/cluster-computing-with-ansible-and-raspberry-pi
• Previous notes
  • https://gist.github.com/chrowe/fe8edd7553c678745f5f3ceff9a861a3