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Dear jjdege.
How can you solve the error when you install the ethercat package by command "sudo apt install -y linux-headers-(uname -r) ethercat-master linuxcnc-ethercat?

I read your post and it took a while to sink in how well running the native RaspianOS with the 6.12 kernel for what I want to accomplish.  I'm guessing that 6.12+ might be a real game changer across the board but I remember discussions about certain run-time flags being used to determine if PREEMPT_RT was part of the build and people commented that some don't match up yet.

Do you think that might be a hurdle in the short / mid  term?

Do you think someone familiar with the run-time testing code might already be working on a fix to any of those problems?

I finally feel like my basic Pi5 (NVME boot) / Mesa 7i95T system is basically functional.

I used Rob's link to what I think is his Google Drive to get what I believe is a LinuxCNC 2.9.3 / Kernel 6.6 RT ISO.

Because of being new or very rusty on virtually every level, I wound up stumbling my way through that process relying on the gracious help from the community.

I will attach a number of files for anyone to glance at or comment on if they wish.

Since I know now that there are many choices I should do differently I ordered an inventory of NVME and SD cards to start over clean and also try out other combinations of options without abandoning what I have.

I have a few questions before I start over 'clean':

1) Is the Pi5 2.9.3 ISO that I downloaded (or a newer one) now attached to the link on the Downloads page or is the one I downloaded still the latest?

2) I installed NetworkManager because I was struggling getting my WiFi working for internet access while dedicating the cable Ethernet to the Mesa board. Would it be better for me to avoid NetworkManager this time around?

3) I installed the Raspberry KVM because I thought that it might be useful sometimes, but I have never really used it so far. I'm wondering if there might be some latency implications to its presence or use?

I also included a screen capture for the latency histogram if anyone is curious.

Thanks

I have never used EtherCat with Raspberry so I can't answer you.
However, I read on the forum that others have had a similar problem
(forum.linuxcnc.org/9-installing-linuxcnc...ectory-lib-modules-6 -1-0-25-rt-amd64#310761).
Maybe you can find some useful information there.

Dear elovalvo
Did you install successfully igh ethercat for Rasp 5?
I tried to install, but I got the error.
This error is " modprobe: FATAL: Module ec_master not found in directory /lib/modules/6.6.21-rpi999-rpi-2712"

Hi Scott,First, I want to thank you for your incredible work on the Remora firmware!Two weeks ago, I received my NVEM V5 board and started working on flashing it. Unfortunately, I couldn't find my STLink dongle (seems like I lost it), and I couldn't wait for a replacement. So, I decided to get creative and used what I had available. I flashed an STM32F103C8T6 using a Raspberry Pi Zero W with the "CMSIS-DAP" firmware you mentioned in one of your YouTube videos, using OpenOCD.As you described in the video, I then uploaded the "stm32f103xb_mimxrt1060_qspi_if.bin" to the mass storage device of the STM32F103C8T6, and it seemed to program itself as expected. I then connected it to my NVEM V5 board and dropped the firmware file onto it, but unfortunately, it didn't work.I spent the next three days troubleshooting but eventually gave up and purchased an STM32-Link, along with two CMSIS-DAP Probes (USB-A and USB-C). I received both of these items recently and tried again, but I’m still having issues.The CMSIS-DAP probes aren’t detected at all, neither by MCUxpresso IDE nor PyOCD. The STM32-Link is recognized by PyOCD, but I still can't get it to work as intended.Do you have any suggestions on where I should focus my efforts next? Any guidance would be greatly appreciated.Thanks again for all your help!

Nevermind