April 20, 2024, 11:28:47 PM

Recent posts

A20 / Re: Command to detect A20 LIME...
Last post by faraz - Today at 10:49:10 AM
olimex@a20-olinuxino:~$ sudo ./brd_info.py
Traceback (most recent call last):
  File "/home/olimex/./brd_info.py", line 8, in <module>
    block = bus.read_i2c_block_data(0x50, 0, 32);
  File "/usr/local/lib/python3.9/dist-packages/smbus2/smbus2.py", line 612, in read_i2c_block_data
    self._set_address(i2c_addr, force=force)
  File "/usr/local/lib/python3.9/dist-packages/smbus2/smbus2.py", line 354, in _set_address
    ioctl(self.fd, I2C_SLAVE, address)
OSError: [Errno 16] Device or resource busy

I get this error when I run the script.
I think its because the smbus has changed?

Is there a new version of this script? I want to see the board revision of a site that is not failing.

I can only get to the board via ssh sor similar.
ESP32 / Re: ESP32-POE2 details coming?
Last post by LubOlimex - April 19, 2024, 04:51:27 PM
Very soon. ESP32-POE2 is already tested and in the warehouse, we just have to put up the web-page to sell it (and all related resources).

It would work for your goals.

Yes, MOD-IO and MOD-IO2 can be powered by less than 12V to power everything except the relays.
ESP32 / Re: ESP32-POE2 details coming?
Last post by mihaiadrian - April 19, 2024, 02:39:18 PM
I wrote this to support@olimex.com but no replay so far...

Do you know when esp32-poe2 will be available for sell on the website ?

Also, could you please tell if will be compatible with
https://www.olimex.com/Products/USB-Modules/USB-ISO/ in order to allow galvanic isolation between remote computer and esp32-poe2 powered via Poe ? ( I am still in development phase and still debug and need usb connection to the board in order to debug it )

Also , maybe it is implied, but my plan is to use esp32-poe2 and power 




in order to avoid 12v additional power source ( and use the esp32-poe2 power )

Any ideea, the above MOD-IO / MOD-IO2 can be powered from 5v in order to use the additional GPIO's ( but without relays ) so I can speed up  environment development for now ( until esp32-poe2 is available and power normally from 12v  ) ?

ESP32 / Re: ESP32-C3-DevKit-Lipo USB S...
Last post by LubOlimex - April 19, 2024, 12:18:56 PM
Try with the development json in preferneces instead of the stable:


Follow the instructions here:


After the JSON update the package to 3.0.x and the board should show up.

The pull request for the board is here:


and then in this commit:


FPGA / Re: How to connect a serial co...
Last post by LubOlimex - April 19, 2024, 11:32:35 AM
There should already be debug uart pins, check GPIO12 and GPIO13 of the RPi. The DirtyJTAG software should enabled them already:



We haven't tested it, additional work might be needed on the RISC to output to those pins.
STMP1 / Re: Olimex STMP1 SOM - Error s...
Last post by LubOlimex - April 19, 2024, 09:40:50 AM
The boards with 100k resistor would be revision D1, indicated only on the box (the PCB marking would still says D). All boards purchased directly from our web-shop will be revision D1. If you purchase boards from our-web shop they will have the 100k resistor.

I will update the schematic later today.
STMP1 / Re: Olimex STMP1 SOM - Error s...
Last post by LubOlimex - April 19, 2024, 08:43:37 AM
Good catch, my bad! Proper diff files are now uploaded at the same location:


- Can you please provide a full list of lost capability due to disabling the AXP209 in software?  You said battery charging, low power states, and I think you said elsewhere that some video output capability would be lost.  Is that everything?  I just want to ensure I fully understand the possible effects of disabling the PMIC.

It is mainly the battery-related software functions. The HDMI should be fine for the SOM board (I mainly mentioned it if somebody performs similar removal of AXP support for the LIME or BASE SOM images). Not much should be lost from lack of it. We are not fully aware ourselves of all implications of removing AXP209 driver from the Linux, but on first and second look and tests so far it seems fine.

Drop me an e-mail at support@olimex.com to discuss the details about the affected boards and how to ensure future purchases have the hardware fix applied (and also to discuss returning the two boards that you sent back).
AgonLight / Re: Is everyone enjoying their...
Last post by LubOlimex - April 19, 2024, 08:34:53 AM
This seems like driver issue. Agon Origins uses different and more popular USB chip - CP2104 - it requires different driver (AgonLight2 uses CH340T). Drivers can be downloaded from the official silabs web-site here:


Download and install the Windows driver and new COM should appear, the rest of the procedure should be the same.

FPGA / How to connect a serial consol...
Last post by PhilTom - April 19, 2024, 05:37:12 AM
I'd like to be able to connect a serial terminal to this board so that I can run a RISC-V core and get serial data to/from it. How would I go about doing this?
FPGA / Re: ILA on GateMateA1-EVB
Last post by PhilTom - April 19, 2024, 05:26:42 AM

I don't have an answer for the ILA issues, but was wondering if you could tell me how you got VGA working? What VGA code did you use?