On the ESP32-ADF from Olimex the SPI Port for SD Card has GPIO12 as MISO, which has two issues: a) GPIO12 is a strapping Pin, which means, resetting during a read can cause GPIO12 to stay High, choosing 1.8V flash voltage instead of 3.3V and reboot fails. Can be avoided by efusing this pin, so it is...

Running the ESP32-audioI2S library example, everthing works fine:

https://github.com/schreibfaul1/ESP32-a ... P32_ES8388

So suspect some wrong settings of the environment like said by the warning.

mfg winfried

Hello, On an Lyrat V4.3 like board, Olimex ESP-ADF, I tried playing wav file with the 'pipeline_equalizer' example.c. using IDF-5.1.1 and latest ESP-ADF library (installed by PlatformIO IDF extension) and default configuration. The difference to LyraT SD-card uses SPI and other Pinout, so a did a cu...

Thank you very much for the explanation, it helps much, we will try another FET or FET-driver. I'm actually not sure why this difference is. The ESP-IDF implementation seems more simpler and the Arduino one a bit more complicated; perhaps the Arduino code has some side effect that makes this work. I...

Thank you for the hint, now I understand: The output is always still an input, so we have to use the "input characteristics" for outputs and therefore there are no output characteristics in the data sheets, which are superseded by them. open drain is implemented to realize buses with common pull ups...

Thank you very much for the advice. With the `pinMode(...)` I already did this on en ESP32 quite a time now (a year). ... the ESD protection will limit your GPIO voltage to a bit above 3.3V ... I could measure 4,85V with my oscilloscope, see snapshot: - Rpu=10 kOhm on GPIO33 on an ESP32S2 (Olimex bo...

.... Can you explain why you want to have open drain outputs in this specific case? Since I want to use PWM to drive a FET with more than 3.3V on input, in this case Vg=5V: * * +-----+---> + Vcc * | | * Diode _ 3 * A 3 solenoid * Vg <-+ | 3 * | | | * R +----- * | _| * GPIO__+__||_ (MOS)-FET/Transis...

What is the best practice to set open drain output ( GPIO_MODE_OUTPUT_OD ) on an LEDC channel ? Using ESP-IDF framework and trying to set it before or after configure the cledc hannel with "ledc_channel_config()" does not work. for example after configuration of ledc channel #include <driver/ledc.h>...

A link to the project would be fine,
also trying a streaming with the ESP32-POE-ISO (Olimex).

mfg winfried