I am using esp-idf v3.1.3

I am using the ESP32 to read/write data from/to an SD card in the SPI mode. Occasionally, the file write operation freezes leading to the task getting stuck at that stage. Log file gathered in verbose mode is shown below:
Screen Shot 2019-04-05 at 4.11.20 PM.png
As shown above, the last write ...

Sorry the firmware version is v3.1.1.

Also, the issue wasn't fixed with the changes. I ran unit tests on the clock. For the cases where its not working properly, the unit tests show that the crystal is detected but the time measurement fails.Following are the results of the unit tests:
attempt #1/3 ...

https://github.com/espressif/esp-idf/issues/2101

https://github.com/espressif/esp-idf/commit/f7df532ec0dabfee89b26348e152c7f66fae576a


The issue was resolved by changing the clk.c file with the bugfix (https://github.com/espressif/esp-idf/commit/f7df532ec0dabfee89b26348e152c7f66fae576a)

Any ...

https://github.com/espressif/esp-idf/issues/2101

https://github.com/espressif/esp-idf/co ... f66fae576a

Hi,
I am using esp-idf v1.1.1 which already has the bug fix that was reported. I am still getting the failures in a few boards.

Does anyone have specifications regarding the crystal and the capacitance to use for the external 32.768kHz clock with the ESP32Wroom module?
I have tried using this crystal: https://www.digikey.com/product-detail/en/ecs-inc/ECS-.327-6-12-TR/XC1945CT-ND/3927445 .
with 12pF capacitors on both sides ...