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Ensure that the 5V power supply is stable and within the specified range for the board. Fluctuations or insufficient power can cause boot issues. Check the connection between the SDRAM and the AM3352-SOM. Ensure there are no loose connections, damaged traces, or other hardware issues. The problem might be due to incorrect memory initialization settings. Verify the SDRAM parameters in the U-Boot configuration. Sometimes, incorrect timings or parameters can cause the boot process to hang. If possible, try using a different U-Boot version to see if the issue persists. Sometimes, a different version might have better compatibility with your board. Cat likes to eat

#34

ESP32 / Re: ESP32-C3 Dev Kit LiPo can...

Last post by LubOlimex - April 22, 2024, 12:30:48 PM

QuoteI'm using Arduino IDE
Latest 'additional boards manager with the correct board listed.

What is the version of the ESP32 package as listed in "Additional boards maanger"?

What is the board selected (as written in the list)?

Did you try with developer json, instead of the stable one? I've explained it here:

https://www.olimex.com/forum/index.php?topic=9453.msg39523#msg39523

#35

ESP32 / Re: Olimex ESP32-PoE-ISO

Last post by LubOlimex - April 22, 2024, 08:30:30 AM

Maybe check here: https://www.olimex.com/forum/index.php?topic=8688.0

#36

ESP32 / ESP32-C3 Dev Kit LiPo can't u...

Last post by 38Super - April 21, 2024, 10:41:48 PM

Hi
I can't upload my sketch to either of my ESP32-C3 Dev Kit LiPo boards. I get:-

esptool.py v4.6
Serial port COM6
Connecting...
Chip is ESP32-C3 (revision v0.3)
Features: WiFi, BLE
Crystal is 40MHz
MAC: a0:76:4e:79:a9:60
Uploading stub...
Running stub...
Stub running...

A fatal error occurred: Unable to verify flash chip connection (No serial data received.).
Failed uploading: uploading error: exit status 2

Sometimes it it just says:-
A fatal error occurred: No serial data received.
Failed uploading: uploading error: exit status 2

I'm using Arduino IDE
Latest 'additional boards manager with the correct board listed.
Recognised as the correct board on Com6
but
"Get board info" says:-
BN:Lolin S3
VID : 0x303a
PID : 0x1001
SN : NULL

I've tried different cables and USB ports but no luck.

Laptop running Windows 11.
The board is recognised when I plug it in and the 'charging' LED comes on the board lights up.
When I first plugged them in the boards uploaded ok but not again.

Any help much appreciated.
I'm very new to this so if more info is needed please let me know.

Thanks

#37

A20 / Re: Command to detect A20 LIME...

Last post by faraz - April 20, 2024, 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.

#38

ESP32 / Olimex ESP32-PoE-ISO

Last post by folkert - April 19, 2024, 10:00:50 PM

Hi,

How can I use the SD card reader on the Olimex ESP32-PoE-ISO?
Do I require a specific type of SD card?

#39

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.

#40

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

https://www.olimex.com/Products/Modules/IO/MOD-IO/open-source-hardware

and

https://www.olimex.com/Products/Modules/IO/MOD-IO2/open-source-hardware

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 ) ?

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