01 Dec 2015
So last Thursday (26th Nov 2015) the Raspberry Pi Zero was announced and made available that very day. Basically the Zero is a small and ultra cheap (£4) fully functioning Raspberry Pi, but it doesn't have any native networking and has only one USB port (which you need an OTG adapter to use).
In the UK I was lucky enough to be able to order two Pi Zero's and have them delivered the next day. The only problem was I didn't have an HDMI monitor or a USB hub to connect a keyboard and a WiFi adapter at the same time. My intended use for the Zero's is for them to be little headless Linux boxes that I can put into various electronic projects and program them over WiFi (Think IoT), so I didn't want to mess around with HDMI and GUI interfaces.
So here is a little guide showing you how to setup a Raspberry Pi Zero without an HDMI monitor or a keyboard / mouse. We will just use a USB WiFi adapter (connected to the OTG USB port) and a Linux machine to do the setup. If you don't have a Linux machine available, you could even use another Rasberry Pi with a card reader to set this up.
This should be possible to do on other platforms as well but you will need to be able to mount an Ext4 partition natively.
Step One - Install the Linux image
First you will need to install a copy of Raspbian Jessie onto your micro SD card. You can find the downloads here and the installation guides are on the same page as well. For Linux I will be using this guide.
Step Two - Mounting it locally
After you have copied the Raspbian image onto the SD card you will need to mount it to your system. The easiest way to do this is just unplug your card reader and plug it back in.
Once the drive has mounted to your system you will need to find where it has mounted. An easy way to do this is using the command
df -h. For example for me it returns:
I can see from this my 64GB SD card is the device /dev/sdc and the boot and main partition are mounted under
/run/media/davidmaitland/. Change directory into the main partition as root ready to edit the files. This is likely to be the same drive that was referenced during the image installation earlier.
Step Three - Configure your WiFi
Next we're going to configure the network interface. Edit the interfaces file
etc/network/interfaces. Pay attention to the path in the files I reference, there is no leading slash as you want to edit the files on your SD card and not the ones on your host system!
If you're not sure how to edit files on Linux, try
nano etc/network/interfaces then
Ctrl + x to save when done.
Find this block in the file:
Then change it to this:
If you want to have a static IP instead of using DHCP (easier to find once the Pi has come up on your network) then change it to this instead:
As pointed out by someone on Reddit, if you're using static networking you will want to setup your DNS servers as well. Edit
etc/resolv.conf and add the following:
Now let's setup the WiFi connection and passkey. Edit the file
Add this to the end:
Finally remove the SD card from your computer (you may wish to unmount it first) and place into your Zero.
Step Four - Boot the Pi Zero!
Now it's time to boot the Raspberry Pi Zero. Make sure you have your WiFi adapter plugged into the Zero and give it some power. For me it takes about 45 seconds to boot and connect to my WiFi network.
Now you can SSH directly into your Raspberry Pi Zero!
If you configured your Zero to use DHCP you will need to find it's IP address. There are a few ways you can do this:
- Most routers will tell you somewhere in their web interfaces what IP allocations they have assigned to devices.
- You could use nmap to scan the local network for devices running with port 22 open
sudo nmap -p22 -sV 192.168.0.0/24.
- From the comments Coder-256 pointed out the default hostname for a Raspberry Pi is
raspberrypiand on most networks you can SSH directly to this instead of the IP address
The default password is
After a new install there are a few things you're probably going to want to do.
First I would update the software running on your Zero:
If you're going to be using your Zero completely headlessly like me there are various things you can do to save energy and speed up the device.
Boot up into multi-user mode (disable GUI on boot)
sudo systemctl set-default multi-user.target.
To disable HDMI edit
/etc/rc.local and add the following line at the bottom above
exit 0 line:
You may want to run
sudo raspi-config to change other common Raspberry Pi settings as well.
Let me know below if this guide was useful or if you have any suggestions!