New build, installed uSD card reader incorrectly... Don't do what I did.

[h0ck3ystyx]

I was having issues with getting the ESP32 to boot. This is what I was getting from the serial terminal :

I (287) psram: This chip is ESP32-PICO-V3-02
I (287) spiram: Found 16MBit SPI RAM device
I (287) spiram: SPI RAM mode: flash 80m sram 80m
I (291) spiram: PSRAM initialized, cache is in low/high (2-core) mode.
I (298) cpu_start: Pro cpu up.
I (302) cpu_start: Starting app cpu, entry point is 0x40081c60
I (0) cpu_start: App cpu up.
I (557) spiram: SPI SRAM memory test OK
I (599) cpu_start: Pro cpu start user code
I (599) cpu_start: cpu freq: 240000000
I (600) cpu_start: Application information:
I (602) cpu_start: Project name: imsaisim_esp32
I (608) cpu_start: App version: V1.13.0
I (613) cpu_start: Compile time: Sep 1 2024 06:11:03
I (619) cpu_start: ELF file SHA256: a195df7f0fdfe351...
I (625) cpu_start: ESP-IDF: v4.4.4-1-gadda465dc3-dirty
I (632) heap_init: Initializing. RAM available for dynamic allocation:
I (639) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (645) heap_init: At 3FFBC570 len 00023A90 (142 KiB): DRAM
I (651) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (657) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (664) heap_init: At 4009DC98 len 00002368 (8 KiB): IRAM
I (670) spiram: Adding pool of 1581K of external SPI memory to heap allocator
I (678) spi_flash: detected chip: generic
I (682) spi_flash: flash io: qio
I (687) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
E (722) nvs: Error (ESP_ERR_NVS_NOT_FOUND) opening NVS handle!
W (722) nvs: Defaulting log level NVS_LOG_LEVEL = INFO
I (724) esp32_boot: Log Level set to INFO
I (729) esp32_hardware: Shell Running on Core#0
I (1214) esp32_hardware: CP-A Found - Power Switch 1
I (1214) esp32_hardware: DIP/MEM Switches: 00
I (1214) esp32_hardware: Initializing uSD card
I (1219) gpio: GPIO[13]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
E (1228) sdmmc_io: sdmmc_io_reset: unexpected return: 0x108
E (1234) vfs_fat_sdmmc: sdmmc_card_init failed (0x108).
E (1240) esp32_hardware: Failed to initialize the card. Unknown error (264: ESP_ERR_INVALID_RESPONSE).
W (1250) esp32_hardware: Check all soldering for the uSD card and RN1 resistor network.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! The uSD tests appear to have FAILED.
!
! Please take note of the above message(s) and review the state of the
! uSD card and/or your soldering.
!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

If I took the uSD card out of the reader, I got a different message, so I figured that was working correctly. During some debugging, I accidentally smoked my ESP32, so ordered more from Amazon, flashed with instructions and an assist from Dave. Still had the same boot issues. After using the schematics from v3.4.8 ( I have a v3.5 board ), i confimed I had good connectivity between the ESP32 and the uSD header. Using the schematic, i found that the ground on the header didn't go to the ground on the uSD card shroud. UGH - I INSTALLED THE BOARD UPSIDE DOWN!

This is what it SHOULD look like ( I need to clean up the flux ).

Hope my pain will help somebody :)

[rvsjimbo]

I did something similar with the headers (both of them) for the ESP32 - that was a right PITA to fix - but it all works now and I love it!