In this article, we will guide you through the process of enabling the i2c interface on a Raspberry Pi running Ubuntu 18.04 Server. This is a crucial step for those who wish to connect their Raspberry Pi to i2c devices, such as sensors, displays, or other microcontrollers.
To enable i2c on a Raspberry Pi running Ubuntu 18.04 Server, you can either use the
raspi-config utility or the
ubuntu-pi-flavour-makers repository. Both methods will allow you to enable the i2c interface and communicate with i2c devices.
What is i2c?
i2c (Inter-Integrated Circuit) is a synchronous, multi-master, multi-slave, packet-switched, single-ended, serial communication bus invented by Philips Semiconductor (now NXP Semiconductors). It is widely used for attaching lower-speed peripheral ICs to processors and microcontrollers in short-distance, intra-board communication.
Enabling i2c on Raspberry Pi
There are two main methods to enable i2c on your Raspberry Pi running Ubuntu 18.04 Server. The first one involves using the
raspi-config utility, while the second one uses the
Method 1: Using raspi-config
- Install raspi-config and dependencies
Run the following commands in your terminal to download and install
raspi-configand its dependencies:
These commands will download the
wget -4 https://archive.raspberrypi.org/debian/pool/main/r/raspi-config/raspi-config_20210604_all.deb -P /tmp apt-get install libnewt0.52 whiptail parted triggerhappy lua5.1 alsa-utils -y apt-get install -fy dpkg -i /tmp/raspi-config_20210604_all.deb
raspi-configpackage and install it along with its dependencies. The
-4option in the
wgetcommand forces the use of IPv4. The
-P /tmpoption specifies the download location as the
- Mount the boot partition
Run the following command to mount the boot partition:
This command mounts the first partition of the SD card (mmcblk0p1) to the /boot directory.
sudo mount /dev/mmcblk0p1 /boot
- Enable i2c
sudo raspi-configand navigate to
Interfacing Options -> I2Cto enable the i2c interface.
- Verify i2c is enabled
ls /dev/i2c*in your terminal. If i2c is enabled, it should respond with
- Detect i2c devices
sudo i2cdetect -y 1to detect any i2c devices connected to your Raspberry Pi. The
-yoption skips the user confirmation, and
1is the i2c bus number.
Method 2: Using the ubuntu-pi-flavour-makers repository
This method uses a repository specifically tailored for Ubuntu on Raspberry Pi.
- Add the repository
Run the following command to add the
sudo add-apt-repository ppa:ubuntu-pi-flavour-makers/ppa
- Edit the repository file
Open the repository file in a text editor with the following command:
sudo nano /etc/apt/sources.list.d/ubuntu-pi-flavour-makers-ubuntu-ppa-eoan.list
bionicin the file. Uncomment the line starting with
deb-srcif you want the source code repository.
- Update the package list
sudo apt updateto update the package list.
- Install raspi-config
sudo apt install raspi-configto install the
Now you should be able to enable i2c using the
raspi-config utility as described in Method 1.
Enabling i2c on your Raspberry Pi running Ubuntu 18.04 Server can be achieved by following the steps described in this article. Whether you choose to use the
raspi-config utility or the
ubuntu-pi-flavour-makers repository, the end result should be the same: a Raspberry Pi ready to communicate with i2c devices.
Yes, you can enable i2c on a Raspberry Pi running Ubuntu 18.04 Server by following the steps mentioned in this article.
Enabling i2c allows you to connect your Raspberry Pi to i2c devices such as sensors, displays, or other microcontrollers for communication and data transfer.
Method 1 involves using the
raspi-config utility, which is a more traditional method. Method 2 utilizes the
ubuntu-pi-flavour-makers repository, specifically tailored for Ubuntu on Raspberry Pi.
Yes, you need to install the dependencies for
raspi-config by running the specified commands in the article.
You can run the command
ls /dev/i2c* in the terminal. If i2c is enabled, it should respond with
You can use the command
sudo i2cdetect -y 1 in the terminal to detect any i2c devices connected to your Raspberry Pi. The
-y option skips the user confirmation, and
1 is the i2c bus number.
No, Method 2 requires adding the
ubuntu-pi-flavour-makers repository to your system to access the
Yes, you need to mount the boot partition to access the necessary files for enabling i2c using
Yes, i2c can be enabled on other operating systems for Raspberry Pi as well, but the specific steps may vary depending on the OS.