Recent posts

#1

ESP32 / Re: Olimax Esp32-POE-ISO

Last post by Klooid - October 20, 2026, 11:24:26 PM

Hi, I tried to running the Guithub code that initializes the Ethernet, and it didn't work and the serial monitor and debug note is as follows:

21:32:10.677 -> ETH MAC: 00:00:00:00:00:00, IPv4: 0.0.0.0

Open On-Chip Debugger v0.12.0-esp32-20260424 (2026-04-24-15:13)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
DEPRECATED! use 'gdb port', not 'gdb_port'
DEPRECATED! use 'tcl port' not 'tcl_port'
DEPRECATED! use 'telnet port', not 'telnet_port'
CDRTOSConfigure
Info : Listening on port 50001 for tcl connections
Info : Listening on port 50002 for telnet connections
Error: unable to open ftdi device with description '*', serial '*' at bus location '*'

#2

ESP32 / Re: Olimax Esp32-POE-ISO

Last post by LubOlimex - October 20, 2026, 04:22:17 PM

The ESP32-POE-ISO still has LINK and ACK LEDs but boards come empty, you need to first download code that initializes the Ethernet. Try with one of the Ethernet demos, like this one for Arduino IDE:

https://github.com/OLIMEX/ESP32-POE/blob/master/SOFTWARE/ARDUINO/ESP32_PoE_Ethernet_Arduino/ESP32_PoE_Ethernet_Arduino.ino

#3

ESP32 / Olimax Esp32-POE-ISO

Last post by Klooid - October 20, 2026, 03:15:35 PM

Hi, I initially purchased a Esp32-Poe and with this device when I connected to the Ethernet cable (apart from the power on led) two led lights came on. Being impressed with the device I have now upgraded to the "ISO" version and when connecting this to the Ethernet cable the power on leds come on but no additional leds to indicate that I am connected to the internet.

Therefore, can you please provide me with some guidance in how I can check if I am connected to the network/ internet. Thanks

#4

New Products release / ESP32-P4-PC now have GSM LTE 4...

Last post by olimex - October 20, 2026, 01:49:55 PM

Two new demos: Connecting ESP32-P4-PC with GSM 4G LTE modem and ESP32-P4-PC peripheral test https://olimex.wordpress.com/2026/10/20/esp32-p4-pc-got-two-new-software-demos-gsm-lte-connectivity-and-full-hardware-features-check/ #esp32p4 #espressif #esp32 #embedded #iot #lte #arduino #OSHW

#5

A20 / Re: Wich board to correctly mo...

Last post by LubOlimex - October 20, 2026, 10:01:32 AM

Hm... I find that hard to believe since the A20 boot sequence tries the primary SD interface before SPI NOR.

Try re-running the olinuxino-sd-to-sata script, what does it say?

#6

ESP32 / Re: ESP32-P4-PC: USB-JTAG inst...

Last post by LubOlimex - October 20, 2026, 08:58:05 AM

First it is worth testing with our code and see if the same thing exists with it. I specifically recommend testing with this demo that I published like two weeks ago (since it changes a lot of settings and timings around the HDMI):

https://github.com/OLIMEX/ESP32-P4-PC/tree/main/SOFTWARE/ESP-IDF/p4_board_demo

If you don't want to build it you can simply use the binary at 0x0. See if one or both the issues remain.

This hardware revision is pretty good it hugely improved start up issues that occurred with older hardware releases, due to different regulator and logic. Some boards from older hardware revisions had bigger issues especially when ESP32-P4 chip is erased. It is described somewhere in the forum (but for ESP32-P4-DevKit). So this is probably related to either the software or the way Linux handles DTR and RTS or there is silicon bug in the ESP32 chip itself, maybe check the errata sheet for ESP32-P4 v1.3 (the module your board uses), and specifically this issue:

https://docs.espressif.com/projects/esp-chip-errata/en/latest/esp32p4/03-errata-description/esp32p4/unauthorized-ahb-access-may-block-subsequent-psram-or-flash-transactions.html

If the issues remain with the code above, let me know how you test exactly (e.g. step by step) so I can reproduce and test it myself here.

#7

ESP32 / Re: ESP32-P4-PC: USB-JTAG inst...

Last post by Rochus - October 19, 2026, 04:44:18 PM

As noted, Rev. C. I bought them on 19.02.2026, order W-RK180226. What other information do you need?

#8

New Products release / BB-LVL-SHIFT and UEXT-LVL-SHIF...

Last post by olimex - October 19, 2026, 03:27:42 PM

Two new Open Source Hardware boards in stock BB-LVL-SHIFT and UEXT-LVL-SHIFT allow 3.3V targets to tlk to 1.65V-5.5V sensors and targets https://olimex.wordpress.com/2026/10/19/two-new-open-source-hardware-level-shifters-bb-lvl-shift-and-uext-lvl-shift/ #oshw #embedded #esp32 #stm32 #arduino #raspberryrpi #maker #olimex

#9

Neo6502 / Re: Problems Getting Started

Last post by LubOlimex - October 19, 2026, 09:04:22 AM

Do you use the left side connector initially? Only switch to the connector at the back after successfully downloading the firmware.

#10

ESP32 / Re: ESP32-P4-PC: USB-JTAG inst...

Last post by LubOlimex - October 19, 2026, 08:59:41 AM

What is the hardware revision of the board that you use?