ESPHome 16MB flash bug blocking T-Eth-Lite build #209
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this bug was opened with 2025.8.1 and is blocking builds for boards with 16MB flash: esphome/esphome#10454 Are there any recommendations to get this up and running on a T-Eth-Lite before the bug gets closed? I tried manually building the configs locally in ESPHome and removed all the remote references to bypass some of the esp32: settings in the Software/ESPHome/6chan_common_ethernet.yaml that were causing issues but I'm not an expert on this, could use some help. |
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Replies: 3 comments 6 replies
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Specifically, what are you seeing when trying to build ESPHome? 6chan_common_ethernet.yaml doesn't specify the flash_size |
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Yes, and the Lilygo T-Eth-Lite is a 16MB flash board while the esp32-s3-devkitc-1 defaults to 8MB flash, and specifying the 16MB flash is broken so it's either building a 8MB file that won't boot, fails loading the app with a bad header error. I'm having to work around the issues with flash_size to get it to build a 16MB file. Trying with just the YAML from Software/ESPHome/6chan_energy_meter_main_ethernet.yaml I get an 8MB flash file: If I add the platformio section to specify 16MB like this: It still tries to build a 8MB image. If I add the flash size to the esp32: section it does the same: So I'm trying to hack together a YAML that will build a 16MB image so I can boot the t-eth-lite, given that it looks like ESPHome is not respecting the flash_size value. |
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I'm honestly not sure why it's not building a 16MB flash partition, but I don't think this is the issue. It should build the 8MB partition. Is there anything else added or changed to the default common config file? Can you post your full config? What happens if you try to load a pre-compiled config? |
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Using the pre-built " CircuitSetup 6 Channel Energy Meter Ethernet" from https://circuitsetup.github.io/ESPWebInstaller/ it flashes ok but on boot just gives: Building and compiling in ESPHome locally, using the stock config it builds fine: The package flashes ok: But still on boot, all i get is: I've got the chip info as well, if that helps: Let me know what else I can try, or what other info you need to assist. Thanks |
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I used the test firmware from https://github.com/Xinyuan-LilyGO/LilyGO-T-ETH-Series/blob/master/firmware/T-ETH-Lite-ESP32S3_UnitTestExample_250604.bin and confirmed the device physically works. I tried the ESPHome YAML from their project at https://github.com/Xinyuan-LilyGO/LilyGO-T-ETH-Series/blob/master/esphome/lilygo-eth-lite-esp32s3.yaml and got a bootable image built. I tried using "esp32s3box" as the board type in your default YAML and it flashed fine. Not sure if there is something in the newer versions of the boards but this is now working for me. Thanks for the feedback and support, I'm looking forward to getting everything deployed now. |
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Hello @mohammad-vivian-SPOOKY, i'm in the same pit you were, however i'm unable to move forward getting ESPHome flashed to my own T-ETH-Lite (exact same 'ESP-ROM ... entry 0x403c890c' messages). Would you be able to paste your complete (redacted) ESPHome YAML (and other tips if you have them) for me to try and replicate your success ? I have tried a bazinga amount of permutations, without luck, on 6 different T-ETH-Lite's. I've also tried replicating the used esp-idf / platform.io versions you've been using based on your posted log output, to no avail (see related snippet here below). ESPhome 2025.11.2 YAML snippetesphome:
name: energy-meter
friendly_name: energy-meter
platformio_options:
board_build.flash_mode: dio
board_build.flash_size: 16MB
esp32:
board: esp32s3box
flash_size: 16MB
framework:
platform_version: 54.03.21-2
sdkconfig_options:
CONFIG_ESPTOOLPY_FLASHSIZE_16MB: "y"
type: esp-idf
version: 5.4.2 |
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After you get that message, check if the WebUI is up... I didn't add that detail to my thread, apologies. After a successful flash it would stop at that step in the terminal but I saw activity LEDs on the board so i checked the webui and it was up. I guess the code as provided doesn't log much to the terminal perhaps? In case it helps here is the relevant parts of my current yaml. the most important part is that the esp32 block is at the bottom (so that it overwrites the values from the merged yaml in github): |
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Thank you for your answer. I found the issue, it was sitting on my chair. The reason log output stops is because i'm (we're) using a USB2TTL adapter to interface with the LilyGO. By default ESPhome logs to Cheers ! |
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I've added to the default ethernet config. Thanks for pointing this out! |
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Thank you for your answer. I found the issue, it was sitting on my chair.
The reason log output stops is because i'm (we're) using a USB2TTL adapter to interface with the LilyGO. By default ESPhome logs to
USB_SERIAL_JTAGfor the ESP32-S3 variant (https://esphome.io/components/logger/#default-hardware-interfaces). The logger component should be set to output logs onUART0(usinghardware_uartkey) in order to be able to see ESPHome log output on the serial console if connected using a USB2TTL adapter.Cheers !