The issue turned out to be the BLE client which was connected to the ESP32 while it attempted to connect to the peripherals. Although the ESP32 is theoretically capable of supporting 6 simultaneous connections, for some reason things break when the client is connected during the connection to the pe...

ESP32S3, 16MB flash, ESP-IDF v4 with Arduino, Bluedroid My dual-mode BLE code should read MAC addresses sent by a BLE client, then form its own 5 BLE client connections to the given MAC addresses, which are MetaMotionS IMU devices. It finds the devices successfully. However, when trying to connect, ...

I did this, and I did eventually find where the memory leak was. However, it was tricky, as my app is multithreaded so it was hard to know whether a memory allocation happened during a section of code in one thread, or somewhere else in another. Obviously you could add logging to every thread, but u...

I'm using Arduino for ESP32, and the SD library. I cannot get the memory usage below 10KB (with max 1 file open). I found that this memory is allocated by esp_vfs_fat_register . Is there any way to reduce the amount of memory it uses? 10KB seems excessive for a single file. Unfortunately changing fi...

The latest release of ESP-IDF has a heap memory debugging hook feature*, that allows you to run a function every time memory allocation is performed and succeeds. However, this feature does not exist in v4.4, which means Arduino can't use it, since that requires ESP-IDF v4.4. My problem is that I ha...

I'm writing a log file to an SD card. Right now, each entry has a fixed length (16 bytes). 1 data point is generated every second, and they're appended to the file en masse every 30 seconds. My issue is that if the device is turned off during the SD write (which is not visible to the user), the data...

Great, thank you! Good to have confirmation

Nope. Still happening. Still no idea why. I've just been living with it for now.

I'm making an application that can be in one of two modes: BLE or WiFi. Since it will need to switch while running, I need to make sure that the WiFi functionality is really fully disabled, so it doesn't interfere with BLE (or cause security risks!). I use the WiFi library, and I turn it on and off ...

Thank you very much! I'll look into all of these options