Oh, I see. Sorry, I never connected an SD card to an Arduino this way. I only used SD card breakout boards like this one: https://www.waveshare.com/micro-sd-storage-board.htm So, I really can't say what are the possible scopes of error in your arrangement. Let's see if anyone else can suggest anyth...

E (15527) sdmmc_cmd: sdmmc_read_sectors_dma: sdmmc_send_cmd returned 0x109
E (15528) diskio_sdmmc: sdmmc_read_blocks failed (265)
E (15528) vfs_fat_sdmmc: mount_to_vfs failed (0xffffffff).
Card Mount Failed



Sometimes, it report error log like this. I don't even know why show a new kind error

@rpiloverbd

Have you tested the SD card breakout board separately? With an Arduino? Thank you for your advice. I use the SD Adapter and connect it with ESP32 like this, but it can not run SDMMC_Test successfully. I tried to change the connect way to use the SPI method and it can run SD_Test.ino successfully. C...

I use SPI and SD respectively according to some online example guidelines_ Connect my esp32 and SD card in MMC mode, and SD card can work normally in SPI mode_ Test program, but SD_ After MMC connection, "card mount failed" is always prompted. Then I try to pull up gpio2,4,12,13,15 and change it to ...

Question: When the program just starts running, pblescan - > start (0), even if the corresponding device cannot be found, it can run all the time without any error. However, after the corresponding device is found, if the device can be found continuously, it will not report an error. However, once t...

I added four timers to realize the timing of 1, 2, 3, and 4 seconds respectively, but it is obvious that Timer1 does not work. I want to know why. #include "esp_system.h" const int wdtTimeout = 1000; hw_timer_t *timer0 = NULL; hw_timer_t *timer1 = NULL; hw_timer_t *timer2 = NULL; hw_timer_t *timer3 ...

Gatt_client看了之后还是没搞明白 不清楚怎么可以往FF10Service中的FF11写数据 FF12读数据

尊敬的各位开发者 各位技术支持 各位技术大佬：
您好，我是一名初学者，最近几天研究了ESP-IDF的示例之后，还是对ble client的数据收发流程不太了解。 我需要向蓝牙服务器下FF10service中的FF11写入数据，从FF12读取数据，可是我没有看到相关教学（也极有可能是我水平太差没有完全理解），esp_ble_gattc_write_char()是否可以指定给FF11呢？读取数据一定要用notify的形式吗？
期待您能回答此问题，帮助我解决困难，实在感激不尽！非常感谢！

您好 对不起打扰您了 请问您是如何实现读和写的呢