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Raspberry Pi configuration

Download preconfigured Raspberry Pi OS image​

Navio requires a preconfigured Raspbian to run. We provide a unified SD card image for Raspberry Pi 2, 3 and 4. The OS is headless, i.e. it comes without GUI as it is not required for drone applications.

Download SD card image with the latest Raspbian release (Buster)[XZ, 685 MB], (md5)

Writing image to SD card​

  • Get the latest Emlid Raspbian Image.
  • Download, extract and run Etcher with administrator rights.
  • Select the archive file with image and sd card drive letter.
  • Click “Flash!”. The process may take a few minutes.

More detailed instructions are available here.

Configuring Wi-Fi access​

Raspberry Pi 3 and 4 have an internal Wi-Fi module, while Raspberry Pi 2 requires an external USB Wi-Fi dongle. An extensive list of supported dongles is available here.

Wi-Fi networks can be configured by editing the wpa_supplicant.conf file located on SD card (/boot partition). To add your network simply add the following lines to it:

network={
  ssid="yourssid"
  psk="yourpasskey"
  key_mgmt=WPA-PSK
}

To get access to this file use one of the following methods:

Edit configuration on SD card​

Simply plug an SD card in your computer. After getting access to SD card contents, open wpa_supplicant.conf located on /boot partition (with root privileges on Linux) and edit the file as described above.

Use monitor and keyboard​

Connect HDMI monitor and USB keyboard to your Raspberry, power it up and you will get access to the console, where you can use text editor to modify wpa_supplicant.

note

Use the default username pi and the default password raspberry to get access to your RPi.

After logging into the system, type:

sudo nano /boot/wpa_supplicant.conf

Modify the file as described above, save it and reboot. This method may be problematic because some keyboards are not compatible with this kernel. If your keyboard does not work, try another one or use another method.

Use Ethernet​

You can connect to Raspberry Pi over Ethernet by plugging it using Ethernet cable to a switch, router or directly to your computer.

Trying to connect using Zeroconf​

There's a pretty good chance you'll be able to ssh into your Raspberry Pi using Zeroconf.

You can try either ssh pi@navio.local on Mac or Linux or type navio.local in Putty on Windows.

If that doesn't work out for you, read a section below.

Finding an IP address​

To find an IP address of your Raspberry Pi use nmap utility.

It can be run from the console on your desktop: nmap -sn 192.168.1.*

You can use it with a GUI such as Zenmap or Fing application on your phone.

Look for the hostname ”navio”.

wpa_passphrase on Linux​

If you edit the file on a Raspberry or on a Linux computer you can populate wpa_supplicant.conf with a utility called wpa_passphrase like this:

sudo bash -c "wpa_passphrase SSID password" >> /boot/wpa_supplicant.conf

Upgrading​

If required you can now upgrade your system by running:

sudo apt-get update && sudo apt-get dist-upgrade

Expanding rootfs​

note

Emlid Raspbian Buster makes auto-expanding on a first boot.

By default when Emlid Raspbian for the Rapsberry Pi is installed the file system will only expand to occupy 3GB of storage. If you don’t have space left on yor device, you should expand your file system. To do so, just type

sudo raspi-config --expand-rootfs

and reboot.