Hello All, I am trying to enable serial communication with the ROC-RK3328-CC (Renegade) board without any success. The following are the main things I have done in an attempt to get the UART working and the parameters I am using: Using Baudrate of 1,500,000 since many pieces of documentation onl…

First update your system. Then use the libretech-wiring-tool’s ldto command. It’s built into the images. Per libretech-wiring-tool/libre-computer/roc-rk3328-cc/dt at master · libre-computer-project/libretech-wiring-tool · GitHub , both UART 1 and UART 2 are supported. Make sure your serial cable sup…

When using the ldto command, the available overlays do not show a uart overlay. See picture below for the available overlays: [Screenshot 2023-04-21 at 10.27.54 PM] Any ideas why this is? I am using the ROC-RK3328-CC (Renegade) board. Thanks

Update your system as instructed.

Perhaps my understanding of updating the system is not what you intended. I am doing the following to update the system: sudo apt-get update sudo apt-get upgrade I even tried reinstalling the libretech-wiring-tool pakcage from git again through: git clone GitHub - libre-computer-project/librete…

Use sudo ./ldto list instead of the system one.

Where do I find a list of serial cables that are confirmed to support 1.5Mbps?

Libre Computer Hub

Enabling and using UART

Hardware

roc-rk3328-cc, raspbian

librecomputer November 13, 2023, 5:49am 8

Libre Computer Board Debug Serial UART Connection and Setup Guide Hardware

UART serial cables provide a means to get messages and errors from the board without having a graphical interface. It is critical for the debugging of errors that occur in early boot stages and in headless systems where graphics may not be available. A graphical stack or ssh connections might crash on an error so without this means of getting messages from the hardware, figuring out what went wrong becomes a difficult trial and error problem. Thankfully, UART serial cables are widely available …

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