WLAN fluctuations

[christianhcm]

Hardware

ESP32

Firmware version

v2.4.6

Application version

v2.4.6

What happened? What did you expect to happen?

I am observing Wi-Fi fluctuations even to the point of of loss of connection. It started on 23.06.2025 .This also occours with a second identical ESP 32.Swapping cable and power source and disabling roaming hasn't changed anything. This renders all automations inoperable, as the WI-Fi connection drops during execution.

How to reproduce it (step by step)

1. Go to...
2. Click on...
...

Logs

[sitexw]

Hi,

Thanks for sharing the details of your problem. I’ve been following similar reports and in some cases the issue might not be purely Wi-Fi related, but rather connected to memory limitations on certain ESP32 boards (running out of RAM can sometimes trigger resets or unstable behavior).

To help compare experiences, could you share the exact specifications of the boards you tested (model, amount of RAM/PSRAM, flash size, etc.)? That would make it easier to see whether these Wi-Fi drops are linked to hardware limitations or if something else is going on.

Thanks!

[cg089]

Confirmed for 2.4.6 and 2.4.7. Downgraded to 2.3.3, all works good.

Detecting chip type... ESP32 Chip is ESP32-D0WD-V3 (revision 3) Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None Crystal is 40MHz MAC: e0:5a:1b:60:xx:xx Uploading stub... Running stub... Stub running... Configuring flash size... Auto-detected Flash size: 4MB

[sitexw]

Thanks for the feedback, that’s interesting. I’ll try to do the same operation by downgrading to 2.3.3.

Out of curiosity, the ESP32 you have — are you able to check its configuration? Or share the link where you bought it, and whether you know how much RAM or PSRAM it has?

Thanks.

[cg089]

Sorry, I don't have a clue where I bought them, I have so many ;-) I tried with both the USB-C and the Micro USB devkit, I think the USB-C variant was this order here: https://de.aliexpress.com/item/1005006456519790.html?gatewayAdapt=glo2deu

[cg089]

I just realized in my screenshot on the ping responses there are different TTL in the tcp/ip stack, firmware 2.4.6 seems to have 64 whereas 2.3.3 has 255, if that helps.

[abaghbani]

Hello, I have this esp32-s3: https://www.wemos.cc/en/latest/s3/s3_pro.html based ESP32-S3-WROOM-1 16MB Flash (Quad SPI) 8MB PSRAM (Octal SPI)

and just try rev 2.4.7 (latest) and got this error:

load:0x3c0e0020,len:0x33e0c load:0x3fc945c0,len:0x577c load:0x40374000,len:0x6a60 load:0x42000020,len:0xd5574 load:0x4037aa60,len:0x9b5c SHA-256 comparison failed: Calculated: 968eb62d9cd86529a9b1c33173605786d532790e5af79ef654c7a27941920b95 Expected: 4c52da676c17c56754d6fd02776e5a04d0ea4b9f794007e24c84b229ff3d636a Attempting to boot anyway... entry 0x40377440 ESP-ROM:esp32s3-20210327 Build:Mar 27 2021 rst:0x7 (TG0WDT_SYS_RST),boot:0x8 (SPI_FAST_FLASH_BOOT) Saved PC:0x403743c0 SPIWP:0xee mode:DIO, clock div:1 load:0x3c0e0020,len:0x33e0c load:0x3fc945c0,len:0x577c load:0x40374000,len:0x6a60 load:0x42000020,len:0xd5574

I also tested with ver2.3.3, similar issue:

load:0x4037af84,len:0xa450 load:0x4037af84,len:0xa450 SHA-256 comparison failed: Calculated: 63deb6dcb0087bd1a33bb88bc1dbc4567779655daca36ecc23155882c23cbb4b Expected: 0328425b7288d1f02b4a4efa865d964bb54dc11db855be422c0dfb15efb86cea Attempting to boot anyway... entry 0x40377470 ESP-ROM:esp32s3-20210327 Build:Mar 27 2021 rst:0x7 (TG0WDT_SYS_RST),boot:0x8 (SPI_FAST_FLASH_BOOT) Saved PC:0x40379adb SPIWP:0xee mode:DIO, clock div:1 load:0x3c0e0020,len:0x33988 load:0x3fc953e0,len:0x56dc load:0x40374000,len:0x6f84 load:0x42000020,len:0xd2028

not sure is it related to flash/ram size issue or not