And again someone who has problems with esp32 and sd cards

[kearins]

At last, after days of experiments, hours of disappointments, I did it! I've got 3Mb/s write speed in fat file system with 4-line mode:

Code: Select all

I (178) MAIN: Initializing SD card
I (178) MAIN: Using SDMMC peripheral
I (3185) MAIN: host.slot=1 host.max_freq_khz=50000
I (3185) MAIN: Mounting FAT...
I (3247) MAIN: esp_vfs_fat_sdmmc_mount() ret=0
Name: RUNSD
Type: SDHC/SDXC
Speed: high speed
Size: 30672MB
CSD: ver=1, sector_size=512, capacity=62816256 read_bl_len=9
SCR: sd_spec=2, bus_width=5
I (3253) MAIN: card->csd.tr_speed=50000000
I (3257) MAIN: Opening file
I (6368) MAIN: (  0) File written in 3107ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (9347) MAIN: (  1) File written in 2978ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (12630) MAIN: (  2) File written in 3283ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (15412) MAIN: (  3) File written in 2782ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (18676) MAIN: (  4) File written in 3264ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (21967) MAIN: (  5) File written in 3291ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (24726) MAIN: (  6) File written in 2759ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (28000) MAIN: (  7) File written in 3274ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (31049) MAIN: (  8) File written in 3049ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (34052) MAIN: (  9) File written in 3002ms, bytesWritten=10485760 (10.00Mb) cntWrites=640
I (37333) MAIN: ( 10) File written in 3279ms, bytesWritten=10485760 (10.00Mb) cntWrites=640

[ESP_krzychb]

Congratulations!
Nice "Manhattan style" wiring.

[hans_mueller]

It seems that I am having the same problem. I followed your steps, which made it all work in 1Bit mode. Have you figured out how to use 4Bit mode? Thanks.

[ShaniAkalanka]

May I know if two esp32 can be connected to one sd card? If so, how to connect it? Please help me know about it.