February 17, 2025, 05:25:29 AM

Recent posts

#71
A20 / setup olimage via UART with rp...
Last post by lobra2 - January 09, 2025, 03:53:23 PM
Hullo!
I am a open-computing enthusiast representing myself and i do this stuff entirely out of personal interest and as part neither of some commercial nor non-profit type venture.

I have a A20-olinuxino-LIME2 rev.L board.
I bought it in the freedombox package which comes with a pre-built debian/freedombox on a sd-card, but am at the moment attempting to setup
debian/olimage myself on a high endurance SD-card, as per the instructions in the guide: https://github.com/OLIMEX/OLINUXINO/blob/master/DOCUMENTS/OLIMAGE/Olimage-guide.pdf

For serial terminal emulation i use my pc which is a raspi 5 running debian/raspios, so i figured i wd use serial to serial instead of going via usb.
For this i use minicom.
This intermodule type communication is new to me so im going by what info i find and what basic copmmuting know-how i possess.
To setup the pi to communicate via serial0 i followed this tutorial: https://howtoraspberrypi.com/enable-port-serial-raspberry-pi/

However this to no effect, i boot the olinuxino w a olimage img clone on the sd and connected pin-to-pin with the pi running minicom on the port in question but no transmission.
Luckily i thought, i also have a olimex USB-4SERIAL that i bought thinking it might be of using interfacing with some old hardware i have laying around;
i connect with this instead, via the assigned bus designation under /dev and so on,
to the same non-effect.

Again, this inter-module type interaction is new to me, so i am probably doing something backwards in some way that is easy to fix, but i have no idea how.
Please if someone might help me sort this out?
#72
A64 / Re: SD card errors on A64-OLin...
Last post by ilario - January 09, 2025, 11:38:37 AM
Quote from: LubOlimex on January 08, 2025, 04:51:20 PMSo it get fixed by disabling trimming again?

Yes :)
Do you think it could depend on the SD card I am using?
I bought it from here (and supposedly it is a good one):
https://www.mouser.es/ProductDetail/524-SDCIT2-32GB

Quote from: LubOlimex on January 08, 2025, 04:51:20 PMAbout the error:

Do you boot from the eMMC or the card?

From the card. I find it more convenient, so that if I break something in the boot, I can plug it to the laptop and fix it.

Quote from: LubOlimex on January 08, 2025, 04:51:20 PMWhen does this error appear? Is it one time during and after boot or it repeats after a while?

After a while. I suppose it happens when the systemd decides to run fstrim.

Quote from: LubOlimex on January 08, 2025, 04:51:20 PMDoes the board recover from the problem or it hangs and needs a reboot?

Usually nothing bad happens. It happened once that I got that error during an apt upgrade, and the upgrade was interrupted. And when I was using RAID (bad idea, I stopped doing that) the RAID was de-synchronizing.

If you are interested in seeing the errors inside a full dmesg log, have a look at this one from November 2023. https://nextcloud.pangea.org/s/LZZTGtsgXPTJF36 You will see also RAID-related messages as back then I was still using it.
#73
ESP32 / Re: STP Loop Error
Last post by LubOlimex - January 09, 2025, 09:05:57 AM
Check this issue and solution maybe:

https://github.com/esphome/firmware/issues/228

If the issue remains maybe post in the issues at the esphome github explaining the problem in details, they'd know better.
#74
ESP32 / STP Loop Error
Last post by marksims - January 08, 2025, 05:01:38 PM
Hi -

I have recently installed the ESP Home Bluetooth Proxy on an ESP32-POE-ISO-EA-IND and when I connect the device to my Unifi POE switch I am receiving an STP loop error.

Has anyone encountered this error and if they have could the method to resolve be shared?

I have previously installed and connected a similar ESP32-POE-ISO-EA-IND to my Unifi POE switch without issue and connected successfully to Home Assistant.


#75
A64 / Re: SD card errors on A64-OLin...
Last post by LubOlimex - January 08, 2025, 04:51:20 PM
So it get fixed by disabling trimming again?

About the error:

Do you boot from the eMMC or the card?

When does this error appear? Is it one time during and after boot or it repeats after a while?

Does the board recover from the problem or it hangs and needs a reboot?

#76
A64 / Re: SD card errors on A64-OLin...
Last post by ilario - January 08, 2025, 03:43:05 PM
Updates:

After disabling the automatic trimming, no other errors appeared.

Now I set up another A64-OLinuXino A64-OLinuXino-2Ge16G-IND hardware revision G with a new SD card (SDCIT2/32GB Kingston Memory Cards 32GB microSDHC Industrial C10 A1 pSLC Card), freshly installed Debian Bullseye following the Olimex guide, no fancy partitions no RAID.
Before disabling the automatic trimming, I observed the same issues.


mmc_erase: group start error -110, status 0x0
sunxi-mmc 1c0f000.mmc: data error, sending stop command
sunxi-mmc 1c0f000.mmc: send stop command failed
#77
FPGA / Space Invaders run on Intel808...
Last post by olimex - January 08, 2025, 02:57:25 PM
Complete Intel8080 computer implemented on GateMateA1-EVB Open Source Hardware FPGA board runs Space Invaders Retro Game! Thanks Michael Schroeder for the amazing project https://olimex.wordpress.com/2025/01/08/space-inavders-retrogame-runs-on-gatematea1-evb/ #intel8080 #colognechip #gatemate #fpga #retrogaming
#78
PCB TECH / Re: Live-Neutral AC connectors...
Last post by ilario - January 08, 2025, 01:58:57 PM
OK!
Thanks!
I will try with the 5-to-3.3V converter first, and fall back to the 240V-to-3.3V one if I have problems with the first :)
#79
PCB TECH / Re: Live-Neutral AC connectors...
Last post by olimex - January 08, 2025, 01:49:54 PM
Hi,
There is no problem to switch L and N.
There is no dedicated connector this is module which people put on PCBs so standard header pins are used.
I recommend you to solder cable with plug if you intend to connect direcly to mains.
Be careful its High Voltage!
Tsvetan
#80
New Product Ideas / Re: RVPC improvement
Last post by olimex - January 08, 2025, 01:46:43 PM
Hi,
I think beside the 1 pin connection there is one more constrain - the available memory. This makes any extension more challenging, but anyway what is life without challenges?
Have fun!
Tsvetan