As you can see, the LGPIO code is as simple as lgpio.i2c_open(1, addr) to open the I☬ device and lgpio.i2c_write_byte(, ) to send the data.Īfter connecting the fan and Raspberry Pi, run the following Python script to control the speed of the fan with PWM.
If run successfully, the built-in LED on the Arduino Uno will blink on and off for one second each. Lgpio.i2c_write_byte(h, 0x1) # switch it on Lgpio.i2c_write_byte(h, 0x0) # switch it off # Connects to Arduino via I2C and periodically blinks an LED # Uses lgpio library, compatible with kernel 5.11 To have the Raspberry Pi send instructions to the Arduino over I☬, run the following Python script: # Raspberry Pi Leader for Arduino Follower
If you are new to Arduino boards and are unfamiliar with how to compile and upload the sketch, click here for more information. If you see the 08 in the first row as above, the Arduino is awaiting instructions over I☬. To test that it is working properly, run i2cdetect -y 1 on your Raspberry Pi. This sketch joins the I☬ bus at address 8. In order to have the Arduino act as an I☬ follower, run the following sketch on it: #include A Raspberry 3 or 4 with Ubuntu 21.04 setup and installed.How to install and get started with GPIO pins on Ubuntu.Otherwise, please see how to install Ubuntu Server on your Raspberry Pi and make it 21.04. If you already have Ubuntu 21.04 or newer set up on a Raspberry Pi, you are ready for this tutorial. This tutorial covers some basic functionality of LGPIO, including examples using basic GPIO control, I☬, PWM, and SPI. But fear not, there is a new package in Ubuntu 21.04 called LGPIO that allows full control over the header pins with the latest kernel version. This post by Dave Jones (waveform) explains the reasons for the changes. This means packages such as RPi.GPIO no longer function properly with newer kernels. This tutorial originally appeared on William Wilson’s (jawn-smith) blog and was contributed and modified here with permission.Īs of Linux kernel 5.11, the old methods of communicating with header pins on the Raspberry Pi no longer work.
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