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#91
NXP / Re: Flash-eXXGs16M and iMX8MP-...
Last post by LubOlimex - May 28, 2025, 08:12:36 AMYes, the first one - if you wish to use the eMMC from the module with iMX8MP design you should desolder the SPI always.
The SPI memory of Flash-e32Gs16M won't work with iMX8MP-SOM-EVB-IND. The reason for the miss is that the module works fine with RK3328 and STMP designs but they are working at 3.3V (unlike the iMX8MP that works at 1.8V).
It is not very good practice to have a 3.3V memory to the 1.8V port of the iMX8, this might damage the main CPU. Or level shifting would be required.
The eMMC memory would work at 1.8V tho. If you wish to use that extension module for the eMMC, my advice would be to desolder the SPI memory.
Will see how things get done in next revisions.
The SPI memory of Flash-e32Gs16M won't work with iMX8MP-SOM-EVB-IND. The reason for the miss is that the module works fine with RK3328 and STMP designs but they are working at 3.3V (unlike the iMX8MP that works at 1.8V).
It is not very good practice to have a 3.3V memory to the 1.8V port of the iMX8, this might damage the main CPU. Or level shifting would be required.
The eMMC memory would work at 1.8V tho. If you wish to use that extension module for the eMMC, my advice would be to desolder the SPI memory.
Will see how things get done in next revisions.
#92
A64 / Re: Bookworm upgrade availabil...
Last post by ilario - May 27, 2025, 05:02:30 PMQuote from: jch on March 22, 2025, 09:25:44 PM> as A64 is already considered as "old" SOC probably no one is / will be working on this
In that case, what's the suggested replacement for the Olinuxino-A64?
No answer, so seems that so far (2025-05-27) there is no suggested replacement.
I just realized the existence of the System-on-Module (SOM) products line, and you could consider trying those products instead. The newest being iMX8MP-SOM-4GB-IND + iMX8MP-SOM-EVB-IND combination (and maybe including also Flash-e32Gs16M but check out this topic https://www.olimex.com/forum/index.php?topic=9808.0).
Not as convenient as a Single Board Computer, as it does not have a nice box, but it looks like a viable option to me.
#93
NXP / Flash-eXXGs16M and iMX8MP-SOM-...
Last post by ilario - May 27, 2025, 05:01:21 PMDear Olimex team,
I was checking into the iMX8MP-SOM-4GB-IND + iMX8MP-SOM-EVB-IND combo and specifically into its accessory Flash-e32Gs16M.
In the description page of the accessory, there is this eerie text:
What does it mean?
Should I desolder the 16 MB SPI memory in order to be able to use the 32 GB eMMC one?
Or can I just plug it in and use the eMMC one, with the SPI just not showing up?
I was checking into the iMX8MP-SOM-4GB-IND + iMX8MP-SOM-EVB-IND combo and specifically into its accessory Flash-e32Gs16M.
In the description page of the accessory, there is this eerie text:
QuoteFits iMX8MP-SOM-EVB-IND, but only eMMC would work out-of-the-box, there is voltage mismatch on the SPI flash lines (SPI flash should be desoldered).
What does it mean?
Should I desolder the 16 MB SPI memory in order to be able to use the 32 GB eMMC one?
Or can I just plug it in and use the eMMC one, with the SPI just not showing up?
#94
New Products release / T113-S3 IoT home server Hardwa...
Last post by olimex - May 27, 2025, 12:00:42 PMThe Open Source Hardware and Software €20 Smart Home Server Hardware development started. The board is 70x50 mm and have 100Mbit wired Ethernet, WiFi, BT, USB host, USB-OTG, Audio, SD card, LiPo UPS, PoE option. https://olimex.wordpress.com/2025/05/27/the-open-source-hardware-and-software-e20-smart-home-server-hardware-development-started/ #iot #smart #home #server
#95
ST / Re: Debugging the Lora-STM32WL...
Last post by LubOlimex - May 27, 2025, 10:18:02 AMNo real progress had been made. I managed to run it through the STM32CubeIDE like you, thanks for this I didn't know it is possible, but unfortunately haven't found a solution. It is quite likely that the problem is in some compatibility between the CMSIS firmware and OpenOCD. I am not sure when it occurred since I've tested it in the past and it worked just fine. I will also test with IAR EW and see if it works there.
It is not as useful as it should be since the real-time debugging doesn't seem to work reliably (here it works sometimes, sometimes it fails) but it is not useless either - it still can be used relatively well for programming (albeit slow without the flash loader). Just make sure to reduce the work area in the stm32wlx.cfg config.
Yet, LoRa-STM32WL-DevKit is open-source hardware project and the firmware it runs is also open-source (modified dap42 https://github.com/devanlai/dap42), so even if we can't solve it, it is possible to try to fix it yourself.
Edit: I found some old revision boards and they behave similarly to the latest revision so it is not due a change in hardware.
It is not as useful as it should be since the real-time debugging doesn't seem to work reliably (here it works sometimes, sometimes it fails) but it is not useless either - it still can be used relatively well for programming (albeit slow without the flash loader). Just make sure to reduce the work area in the stm32wlx.cfg config.
Yet, LoRa-STM32WL-DevKit is open-source hardware project and the firmware it runs is also open-source (modified dap42 https://github.com/devanlai/dap42), so even if we can't solve it, it is possible to try to fix it yourself.
Edit: I found some old revision boards and they behave similarly to the latest revision so it is not due a change in hardware.
#96
A20 / Re: Problem with Ethernet inte...
Last post by LubOlimex - May 26, 2025, 03:09:26 PMThanks for reporting back maybe it will help another person with similar issue. Interesting find indeed. Glad you got it sorted.
#97
A20 / Re: Problem with Ethernet inte...
Last post by zapparello - May 26, 2025, 03:01:46 PMThank you very much for suggestions!
As it turned out, the entry DC-DC was fried. Perhaps it was powered from 6V or something like that.
Replacing the DC-DC ic fixed the Ethernet. What's most surprising, the PHY didnt get damaged from 5V, just didn't work properly.
As it turned out, the entry DC-DC was fried. Perhaps it was powered from 6V or something like that.
Replacing the DC-DC ic fixed the Ethernet. What's most surprising, the PHY didnt get damaged from 5V, just didn't work properly.
#98
New Products release / ESP32-P4-DevKit project
Last post by olimex - May 26, 2025, 02:27:54 PMMore projects run on Open Source Hardware ESP32-P4-DevKit EUR 16 board with Espressif Dual Core RISC-V SOC https://www.youtube.com/shorts/PqLHHtLoO7w #esp32 #iot #espressif #riscv
#99
ESP32 / Re: Using Passive PoE with ESP...
Last post by LubOlimex - May 26, 2025, 10:49:07 AMIt depends on the exact hardware of the specific board, and especially on the chip that handles the PoE. What is the PoE chip in the board that you mentioned? Check its user's manual or datasheet.
#100
ESP32 / Using Passive PoE with ESP32 f...
Last post by losting - May 26, 2025, 09:34:56 AMHi everyone,
I've been working on a project using an ESP32 board with passive PoE for industrial applications. It's powering a low-consumption sensor node, and so far, it's been running quite stably on a 12V PoE injector.
I'm aware that passive PoE doesn't involve negotiation like active PoE (802.3af/at), but in this setup it's working well since our system is isolated and voltage-controlled.
Has anyone here used passive PoE with ESP32 in a similar industrial environment?
Thanks!
I've been working on a project using an ESP32 board with passive PoE for industrial applications. It's powering a low-consumption sensor node, and so far, it's been running quite stably on a 12V PoE injector.
I'm aware that passive PoE doesn't involve negotiation like active PoE (802.3af/at), but in this setup it's working well since our system is isolated and voltage-controlled.
Has anyone here used passive PoE with ESP32 in a similar industrial environment?
Thanks!