Raspberry Pi Debug Probe: Connecting a Raspberry Pi 5 or 4 to a PC Using UART to USB
📡 In this video, I will show you how to set up USB-to-UART serial communication between your laptop (PC) and a Raspberry Pi 5 or Raspberry Pi 4 using the Raspberry Pi Debug Probe. The Raspberry Pi Debug Probe is a powerful all-in-one USB-to-debug kit that provides a simple, solderless way to connect your Raspberry Pi to your PC for serial communication. The Raspberry Pi Debug probe supports USB to UART bridge as well as USB to two-wire serial debug bridge (Arm Serial Wire Debug supported by default). With its USB-to-UART interface, the Debug Probe makes it easy to debug and program your Raspberry Pi directly from your computer. On the Raspberry Pi 5, UART is enabled by default, so you won’t need to make any changes to the configuration files. This makes the setup process even easier for the latest Raspberry Pi model. 🚀
🔧 When working with the Raspberry Pi 4, you'll need to manually enable UART communication by modifying two key configuration files: config.txt and cmdline.txt. The config.txt file is located in the boot partition of your Raspberry Pi and is used to configure various system settings before Linux starts. To enable UART on the Raspberry Pi 4, you need to add the line enable_uart=1 to config.txt and also modify cmdline.txt to include console=serial0,115200. This setup ensures that the Raspberry Pi will output kernel boot messages through the serial console, which can be accessed via GPIO pins 14 and 15 (pins 8 and 10 on the 40-pin header). This step is essential for establishing serial communication with your Raspberry Pi 4. ⚙️
🐧 I'm an open source enthusiast so for the demonstrations in the video I used Raspberry Pi OS and Ubuntu 24.04 on my laptop. On Linux distributions you can use the screen command line (CLI) application for serial communication. The default baud rate for Raspberry Pi 5 and older model is 115200. For example on Ubuntu execute:
sudo screen /dev/ttyACM0 115200
In this command /dev/ttyACM0 is the device assigned for the Raspberry Pi Debug Probe on the computer. The baud rate is 115200. On Ubuntu the command has to be executed with sudo have access to the device. 🕹️
📺 There are many different applications for serial communication like screen so you use something else. The screen command is available on macOS by default. For example MS Windows users can try PuTTY or minicom (via WSL). 🪟
🔌 UART stands for universal asynchronous receiver-transmitter. When connecting the wires you have to cross RX and TX. For example, as you can see in the video, RX on Raspberry Pi 4 goes to TX on the Raspberry Pi Debug Probe and TX on Raspberry Pi 4 goes to RX on Raspberry Pi Debug Probe. ground (GND) connects to Ground (GND). 🔄
🖥️ By the end of this tutorial, you'll have a complete understanding of how to configure your Raspberry Pi for USB-to-UART communication. Whether you’re using a Raspberry Pi 5, which doesn’t require manual UART enabling, or a Raspberry Pi 4, where the enable_uart=1 line is necessary, you’ll be able to easily debug, program, and interact with your Raspberry Pi through a serial terminal. This setup is ideal for developers and hobbyists looking to simplify their workflow and gain full control over their Raspberry Pi projects. ⭐
📚 Useful Links:
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https://www.raspberrypi.com/products/...
https://www.raspberrypi.com/documenta...
https://anavi.org/article/292/
💡 The video also features my open source hardware add-on board for Raspberry Pi called ANAVI Infrared pHAT. If you are interested in learning more and buying it follow the links below:
Crowd Supply: https://www.crowdsupply.com/anavi-tec...
Mouser: https://mou.sr/4iN4OFF
The Pi Hut: https://thepihut.com/products/anavi-i...
Tindie: https://www.tindie.com/products/anavi...
Lectronz: https://lectronz.com/products/anavi-i...
https://anavi.technology/
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