You got it running, congrats, so what did you decide to do about UART? I am sorry I could not help you at that point!
From what I understood, one of the main advantages of UART would be the ability to control the motor current through software, using a lower current while the motors are idle and the required current while they are moving. This could help reduce power consumption and, more importantly, keep the motor temperatures lower.
Without UART, the current is essentially fixed by the driver adjustment. Since I tested the machine with the current I had configured and noticed that the motors were not getting significantly hot, I eventually decided to simply give up on UART. For my application, at least so far, standalone mode has been working well enough.
At the moment, the only issue I’m still having is getting the TinyBee to recognize the memory card. I’ve already tried more than one card, but I still haven’t been able to get it working properly.
I still want the photo. 
I found pictures here: Meine CNC – HaWiWe. 
hmm, i had no problem with card at all. It is not commented out in your yaml is it?
sdcard:
cs_pin: gpio.5
card_detect_pin: NO_PIN
Also make sure nothing else mistakenly was marked gpio.5
Things that would potentially help: Class 4 is better than the higher (faster) card classesfor most of our machine controllers. Less than 32Gb works better in most cases than larger size. The card must be formatted with FAT32.
Have you tried blowing out the SD card slot with compressed air to be sure there’s no FOD in it?
Thanks for the suggestions. I’m currently testing with a new 8 GB card formatted as FAT32. I also tried a 128 GB card before, and neither one was detected.
My YAML already has:
sdcard:
cs_pin: gpio.5
card_detect_pin: NO_PIN
I also checked that GPIO 5 isn’t being used anywhere else in the configuration.
I haven’t tried cleaning the SD slot with compressed air yet, so I’ll do that as well. At this point, since two different cards haven’t been recognized, I’m trying to figure out whether this is a configuration issue or possibly something with the TinyBee’s SD slot itself.
Thanks again for the help!
Hi everyone. Has anyone developed or used any kind of support for the dust collection hose on the LowRider 4?
In my setup, the hose comes from above, and I’m noticing that a lot of the load is concentrated in a single point on the gantry/Core. I’d like to add some kind of support closer to the router to help carry the hose weight and reduce that stress.
Ideally, I’m looking for something mounted to the Core/gantry itself, possibly with some freedom to rotate or pivot as the machine moves.
Has anyone made something like this, or seen a design/STL that could work?
Did you get the sd card working? I was just on discord and saw that on version 4.0.4 they started having sd and network bugs. Soooo if not working you could go back. I would need to look but mine is running 3.9 something and that may be why mine works and yours does not.
P.s you have an awesome setup! Congrats that table the space that is awesome!
Thanks for the tip! I’m still trying to solve the SD card issue. Right now I’m using FluidNC v4.1.0, and I’m also going to try a third SD card to rule that out.
I’ll also test an older FluidNC version for comparison.
Which Discord are you using? I’d like to join and follow the discussions about FluidNC and the TinyBee there as well.
Here it is the fluidnc discord
I’m also currently working on a boom arm. Will gladly share once done. I have to learn how parametrics work in fusion though, so people can adjust based on their table size.