Hello all,

When using Bluetooth or WiFi there is clicking noise in the recording. I have tried to install various capacitors on the modules between VCC and GND but no significant improvement was detected. When recording to SD CARD without wireless started, I do not see this kind of issues.

I am ...

I have the same problem, how do you reduce the speed of the SPI frequency?


Hello, I was not around for a while, but if it still helps I did it the following way:

static sdmmc_host_t host = SDSPI_HOST_DEFAULT();
...
host.max_freq_khz = 10000;
...
// Further initialization


Additional ...

Hello everyone.

I have audio samples at 8kHz sample rate and successfully send them to Android phone via Bluetooth SPP.

The issue I am facing is non constant send rate - but rather fluctuates from 1KBps to 44KBps and causes for playback to snap. I can solve or minimize this by increasing buffer ...

The reason i mentioned about 5V for this sd card module is because i am using exactly the same module and it was the issue i had with it. I found the same answer on arduino-esp32 github. Im not saying it is/was the issue in your case, but i thought its worth to mention.
This module is using ...

Tell me that you have checked the 3V / 5V comment?
That's an easy datasheet check.
You can get voltage level issues to 'work' when reducing MHz but you don't/should not use empirical results ahead of something as simple as a datasheet check (I'm not doing that check for you).
41Kbps is stupidly ...

Try a really, really slow SPI speed. Like 1MHz. This will help show that the issue is not hardware.


Thanks! Once I decreased frequency it started working. I get max write speed (1024 to 4096 bytes chunks) at 41KBps. This seams low, any hints on how to improve?


This is 5V SD card adapter ...

Hello!

I have created an application for ESP32 that uses I2S to sample built-in ADC and it works great. I use following IIS configuration:
i2s_config_t i2s_config = {
.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN | I2S_MODE_ADC_BUILT_IN),
.sample_rate ...

Try a really, really slow SPI speed. Like 1MHz. This will help show that the issue is not hardware.


Thanks! Once I decreased frequency it started working. I get max write speed (1024 to 4096 bytes chunks) at 41KBps. This seams low, any hints on how to improve?


This is 5V SD card adapter ...

Hello, I am trying to setup SD CARD on ESP32 DevKit V1 board using esp-idf for some time but without success.

When I use Arduino IDE, the card works without issues (SD_Test example sketch).

When using esp-idf example sd_card, i get the following error message:
I (347) example: Initializing SD ...