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raspberry_configuration.md

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Raspberry Configuration

This document explains how to configure a fresh raspberry in order to make it run the prototype.

Installation

Install the latest release of Raspberry Pi OS with Raspberry Pi Imager

Make sure to install the headless version

Set up

After you installed the OS onto the SD, we need to set up a few things.

SSH

In order to access the raspberry while we develop the prototype, we will use an SSH connection. To enable SSH, in the SD of raspberry, just create an empty file without extension called ssh

Make sure to place the ssh file in the boot partition

Now whenever the raspberry will boot, will be able to access it via terminal by typing:

ssh pi@raspberrypi

By default, the password will be raspberry. Make sure to change it using the passwd command.

Wi-Fi

In order to connect to a Wi-Fi network, we need to place another file in the boot partition of the SD. Create a wpa_supplicant.conf file in the boot partition, and add the following inside.

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=IT

network={
 ssid="SSID"
 psk="pass"
}

Make sure to replace SSID and pass with the name of the Wi-Fi network and the password

Serial connection

In order to connect the raspberry with the Flight Controller (FC from here), we need to enable the serial port.

Since Raspberry uses bluetooth on the serial port, let's disable it.

sudo systemctl disable hciuart

Then we need to append to variables in the raspberry configuration file. Let's open the configuration file by typing:

sudo nano /boot/config.txt

Paste at the end of the file these two lines:

dtoverlay=pi3-disable-bt
enable_uart=1

Finally, let's add a new environment variable that will be used by our prototype.

echo "ARDU_SERIAL_CONN=serial:///dev/ttyAMA0:57600" > ~/.bashrc

Now we can reboot with sudo shutdown -r now.

Software

There's a problem with Raspberry Pi Zero W, so need a workaround to make everything work.

pip3 uninstall grpcio && sudo apt-get install python3-grpcio

Then we can install the package so type:

pip3 install mavsdk --user~~~~