I'm trying to download large(ish) files from my ESP32 over WiFi. A 100MB file is taking around 3 minutes which is very slow. I've run the example wifi/iperf test (default sdkconfig) and that produces: esp32> 0- 3 sec 28.22 Mbits/sec 3- 6 sec 34.60 Mbits/sec 6- 9 sec 34.69 Mbits/sec 9- 12 sec 34.82 M...

To answer my own question (for the benefit of others who might trip across this).

Using a semaphore around the SDCard/Display write code seems to work.

Sigh. It was all going so well :-( I'm using a Lolin D32 Pro with its inbuilt SDCard and native TFT display connector and esp-idf v3.2-dev-209-gbe81d2c1... well trying to :( Lolin/Wemos have designed the board with the SD Card and TFT sharing the same SPI bus with a different CS line (4 & 14 respect...

Thanks for that. I'd tried sync() but that doesn't seem to exist and not looked further for fsync.

Unfortunately I've hit a bigger issue now as it seems that one can't use an SD Card and a display on the Lolin D32 Pro (opened new thread).

The Pico doesn't have the CAN bus features (well mine doesn't!).

From my, very limited, ESP32 experience; a FAT filesystem is not at all happy about sudden shutdowns and gets corrupted.

Anyone got a journaling filesystem handy?

I'm trying to put together a CAN Bus + other sensors logger for a racing motorcycle with an ESP-32 (ESP-IDF v3.2-dev-209-gbe81d2c1-dirty) While all the Canbus stuff is working very well, recording data on the integral SD Card is causing me a right headache. Mounting the card works in SPI mode works ...

I'm using an ESP32 plus other bits to construct a logging system for a racing motorcycle (Can Bus, GPS, Linear position sensors etc) and hoping for some pointers on a couple of things. 1. What to use for storage? The onboard flash just isn't large enough to store the amount of data (could easily be ...