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by lbernstone
Thu Jul 16, 2026 4:57 pm
Forum: Hardware
Topic: Use a real esp32 with a simulated
Replies: 1
Views: 38

Re: Use a real esp32 with a simulated

Wokwi simulates very specific displays (ILI9341 and GDEH029A1). It might be possible to program something to match your display, but that is likely far more complicated than just plugging it in IRL. You can use Wokwi to get some experience with how the library works overall, but every piece of ...
by lbernstone
Sun Jul 05, 2026 2:56 pm
Forum: ESP32 Arduino
Topic: 13 INTERNAL ERROR
Replies: 1
Views: 51

Re: 13 INTERNAL ERROR

What OS?
What version of Arduino IDE?
What version of arduino-esp32?
Are you directly following the directions and installing from the stable release link?
Explain a little better what happens when you click the install button. Does it start to download anything? It should download a series of files ...
by lbernstone
Sat Jul 04, 2026 6:10 am
Forum: ESP32 Arduino
Topic: Compile Error in IDE v6 Build of Arduino sketch
Replies: 4
Views: 91

Re: Compile Error in IDE v6 Build of Arduino sketch

I just have an idea of how a lot of this code is structured, and if the compiler complains that a function is not defined, but you can see where it is declared, and other functions in the same header work, then there is probably some config option blocking it out. 2 seconds browsing the code ...
by lbernstone
Fri Jul 03, 2026 2:49 pm
Forum: ESP32 Arduino
Topic: Compile Error in IDE v6 Build of Arduino sketch
Replies: 4
Views: 91

Re: Compile Error in IDE v6 Build of Arduino sketch

Looks like the function is only included if CONFIG_MBEDTLS_X509_REMOVE_INFO is disabled.
by lbernstone
Thu Jul 02, 2026 12:55 am
Forum: ESP32-S31
Topic: TWAI Channels ?
Replies: 1
Views: 81

Re: TWAI Channels ?

Doco says 2 TWAI channels that are CAN FD capable (but not yet certified).
by lbernstone
Fri Jun 26, 2026 1:39 am
Forum: Hardware
Topic: ESP32-PICO-V3-02 main CPU crystal oscillator
Replies: 7
Views: 156

Re: ESP32-PICO-V3-02 main CPU crystal oscillator

See the hardware design guidelines . The on-module primary crystal will be +-10ppm from 40MHz, but the RTC is fractional off that source, so will drift significantly if you are doing serious timekeeping.
You can add a 32.768kHz crystal (at an accuracy of your choosing) on gpio 32/33 to provide a ...
by lbernstone
Thu Jun 18, 2026 3:05 pm
Forum: ESP32 Arduino
Topic: Hardware integration with ESP32S3 Development board
Replies: 5
Views: 121

Re: Hardware integration with ESP32S3 Development board

The SD_Test example demonstrates how to set the pins for non-default configurations.
If you have all 4 data lines connected on the SD, I'd recommend using SD_MMC, as SDIO will be much more performant than SPI.
by lbernstone
Tue May 26, 2026 6:47 pm
Forum: ESP-IDF
Topic: Arduino's old esptool works (with DTR/RTS), IDF v6.0.1 esptool fails — plus RS-485 issue and broken IDF environment
Replies: 2
Views: 90

Re: Arduino's old esptool works (with DTR/RTS), IDF v6.0.1 esptool fails — plus RS-485 issue and broken IDF environment

Build a python virtual environment and test to see if the issue is directly in esptool. If so, post this issue at the esptool repo.

Code: Select all

python -m venv /tmp/esptool
source /tmp/esptool/bin/activate
pip3 install esptool
esptool erase-flash
by lbernstone
Tue May 12, 2026 4:57 pm
Forum: ESP-IDF
Topic: Bootloader offset
Replies: 1
Views: 87

Re: Bootloader offset

The location of the second stage bootloader varies depending on the variant (from boards.txt )
esp32c2.build.bootloader_addr=0x0
esp32c5.build.bootloader_addr=0x2000
esp32p4.build.bootloader_addr=0x2000
esp32h2.build.bootloader_addr=0x0
esp32c6.build.bootloader_addr=0x0
esp32c61.build.bootloader ...
by lbernstone
Sun May 10, 2026 2:37 am
Forum: ESP-IDF
Topic: ESP ENCRYPTED OTA HMAC PROBLEM
Replies: 6
Views: 218

Re: ESP ENCRYPTED OTA HMAC PROBLEM

Header says you need to set CONFIG_PRE_ENCRYPTED_OTA_USE_RSA.
Then, read your file containing a 3072 bit RSA private key in PEM format, and set the rsa_priv_key (and len) in cfg. You could also embed the key in your firmware as a literal string.

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