Recent posts

#1

New Products release / FOSDEM 2026

Last post by olimex - Today at 10:26:00 AM

FOSDEM: Where Open Hardware and Open Source Minds Meet. Last weekend the largest open hardware and open software conference, took place in Brussels. We ran RVPC Soldering workshop and talk about EUR 20 OSHW IoT Smart Home Server https://olimex.wordpress.com/2026/02/05/fosdem-2026-the-biggest-open-source-hardware-and-software-event-in-europe/ #iot #smart #home #server

#2

ESP32 / Re: ESP32-PoE

Last post by LubOlimex - January 26, 2026, 04:41:10 PM

It builds without issues here.

Using library Ethernet at version 3.3.5 in folder: C:\Users\olimex\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.5\libraries\Ethernet
Using library Network at version 3.3.5 in folder: C:\Users\olimex\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.5\libraries\Network
Using library SPI at version 3.3.5 in folder: C:\Users\olimex\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.5\libraries\SPI
"C:\\Users\\olimex\\AppData\\Local\\Arduino15\\packages\\esp32\\tools\\esp-x32\\2511/bin/xtensa-esp32-elf-size" -A "C:\\Users\\olimex\\AppData\\Local\\Temp\\arduino_build_53441/external-power-sense.ino.elf"
Sketch uses 506247 bytes (38%) of program storage space. Maximum is 1310720 bytes.
Global variables use 25864 bytes (7%) of dynamic memory, leaving 301816 bytes for local variables. Maximum is 327680 bytes.

Maybe use the 3.3.5 version of the ESP32 library like me or re-install it.

#3

ESP32 / Re: New ESP32-POE-ISO - was I ...

Last post by LubOlimex - January 26, 2026, 08:34:16 AM

Probably U7 died. Maybe try replacing U7 which is TPS62A02ADRLR(SOT-563-6) and see if it'd work. It is not the easiest soldering job but not the hardest either. Hopefully it is the only component that died.

#4

ARDUINO / Re: Shield LCD16x2 with Arduin...

Last post by Dan - January 25, 2026, 02:14:04 PM

I got it to work with Nano 33 BLE. By including this line: #include <avr/dtostrf.h>, in LCD16x2.cpp file.

#5

ESP32 / Re: New ESP32-POE-ISO - was I ...

Last post by chrismacp - January 23, 2026, 04:49:08 PM

Thanks for the response, happy to hear I don't have to send it back

For the 12v issue, I applied it to the 5v pin, no other power would have been applied from usb or ethernet.

#6

ESP32 / Re: New ESP32-POE-ISO - was I ...

Last post by LubOlimex - January 23, 2026, 03:26:37 PM

Where did you apply 12V to? Maybe it can be fixed by changing a component or two.

#7

ESP32 / Re: New ESP32-POE-ISO - was I ...

Last post by LubOlimex - January 23, 2026, 03:18:09 PM

No, you are good. This is a factory patch applied in hardware revision M1. It is mentioned in the hardware revision changes:

https://github.com/OLIMEX/ESP32-POE-ISO/blob/master/HARDWARE/Hardware-changes-log.txt

#8

ESP32 / New ESP32-POE-ISO - was I sold...

Last post by chrismacp - January 23, 2026, 12:36:28 PM

Hi,

I recently had to buy a new ESP32-POE-ISO as I mistakenly applied 12v to my previous one for a few seconds and it no longer functions (although LEDs do come on).

After unpacking the new unit I noticed it had an extra component ("570F KE") connecting capacitor C26+ to the black box component (DCDC1 I think). I couldn't find a match online to the extra component "570F KE".

I was wondering if this component was to be expected or if I should return this unit? I don't really want something that someone has modified.

Some images (don't seem to open using [img] tags)

https://drive.google.com/file/d/1ccucp0A1oC0FB8-1nU1VaNSfdpXIjaSX/view?usp=sharing

https://drive.google.com/file/d/1Ahccl6cMLyJu11ljA_Rqvy3IGnk5gCB4/view?usp=sharing

https://drive.google.com/file/d/1dgueAAM4adKMQBRIsOjPSFV30N7dl61-/view?usp=sharing


Note: I didn't purchase directly from Olimex, but another store, in Germany.

#9

ESP32 / Re: ESP32-PoE

Last post by Seawolf - January 23, 2026, 04:19:26 AM

I tried running the exact code from tomdom - December 10, 2024, 02:04:02 PM

But that came up with the following error:

 In function 'void setup()':
C:\Users\hefin\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.3\variants\esp32-poe/pins_arduino.h:7:23: error: invalid conversion from 'int' to 'eth_phy_type_t' [-fpermissive]

#10

ESP32 / Re: ESP32-POE-ISO-WROVER rev L...

Last post by LubOlimex - January 12, 2026, 09:44:44 AM

Try with this code (download the whole repo):

https://github.com/OLIMEX/MOD-LCD2.8RTP/tree/master/SOFTWARE/Arduino/graphicstest_olimex_NS2009

Make sure PSRAM is enabled in your board selection options (this is specific for WROVER boards).