Change your
while (read_len > 0)
to
while (total_read == 0 || read_len > 0)

Also be worth adding a timeout clause in the do loop to exit after 5s for example if nothing has been received.

If the wires to your button are long, then the internal pull up may be too weak.
Disable the internal pull up and try an external 10k pull up instead.

I have a Heltec ESP32 with OLED.
Does anyone know of a project box for such a device with a cutout for the OLED and mounting posts?
I'd need to fit a standard battery holder with 2 * 1.5V AAA batteries inside too. But nothing else.
I can make my own, but the result won't look very professional!

Raspberry Pi 5. Running Bookworm.
Installed esp32 by Espressif Systems V2.0.11 using board manager.
Arduino IDE 1.8.19 (same on my Pi4's with Bullseye & Buster distros)

I select a Heltec Kit32 WiFi board. And compile but it cannot find pins_arduino.h.
I have to physically copy the file from the ...

In the .cpp file change
to
In the .h file change
to

Try adding a dummy return value to following function in IS31FL3733.cpp or better yet, make it a void :

uint8_t IS31FL3733::set_page(uint8_t page)
{
write_reg(0xFE, 0xC5);
write_reg(0xFD, page);
}

I had this exact same problem after moving to 2.0.11 ESP32 Arduino.

See https://esp32.com ...

I've just made a major leap in versions of the ESP32 libraries. And Arduino IDE (1.8.19) Raspberry Pi 64 bit Bullseye distro.
I linked my code to a library. In that library there was a function that was declared as returning a value.
However, there was a path in the code where a value was not ...

As it does not find any WAV files, wav is not initialised.
You then try and access it in loop().
I'm pretty sure this will cause the core panic.
As for why it's not seeing any files, I don't know the answer.

This is a very abbreviated form of the code I use. Hopefully it will show you what I am doing.
I don't know if this will compile. I've not got my system to hand. And it is MOST DEFINITELY NOT the most elegant of code.

#include <Arduino.h>
#include "SdFat.h"


SdFat _sd;
File _myFile;


#define MAX ...

I do something very similar. I log GPS/MEMS/BME/Bluetooth OBD/Timestamp every 100mS and store to an SD card.
I found that most writes to the SD card took <5mS. Sometimes however they took approx 320mS.
This is due to the way the blocks are written to the SD card at a low level and can't be changed ...